2^nd International Conference and Expo on Ceramics and Composite Materials July 25-26, 2016 Berlin, Germany

Biography:

Thomas D Benen started his scientific career as a Researcher in Molecular Biology at University Clinics Regensburg, Germany. He completed his MSc in Bioinformatics and Business Administration from the University of Regensburg and PhD in Virology from the University of Hamburg. He worked as a Marketing Representative for the biotech incubator BioPark Regensburg until 2011. In 2012, he joined NanoSight Ltd as Technical Sales Engineer. In 2013, he became Application Specialist for Nanometrics at Malvern Instruments and in 2014 Territory Manager. Since 2015, he is the Sales Manager for Microtrac GmbH for Germany, Austria and Switzerland (D-A-CH).

Abstract:

Both laser diffraction and dynamic image analysis are proven and widely used tools to monitor particle size distributions. Laser diffraction as an ensemble technique can cover a broad range of particle sizes from as low as 10 nanometer to 2-3 millimeter. Dynamic image analysis typically starts at 1 micrometer and goes up to several millimeters, and can also measure particle numbers in a quantitative way. Furthermore, image analysis allows for the assessment of over 30 optical parameters to reveal morphology and particle identity. Traditionally, these methods are used separately and need their own sample preparation. However, after combining newest tri-laser diffraction technology with state-of-the-art image analysis, it is possible to incorporate these 2 measurement methods in a single device, with just one sample preparation for both methods. This reduces work time and operational cost and cost for equipment acquisition up to 40%. We show examples of simultaneous employment of laser diffraction and dynamic image analysis for several kinds of applications in ceramics and filtration.

Biography:

Alex Dommann is heading the Department « Materials meet Life » at Empa since 2013. He received his PhD in Solid State Physics in 1988 from ETH, Zurich in Switzerland. His research concentrates on the surface analysis, bio surface interactions, structuring, coating and characterization of thin films and MEMS structures. He is member of different national and international committees and teaches Materials for Medtech, Crystallography and MEMS technology at different Swiss universities and has published more than 130 papers in the fields of thin films, coatings, MEMS, reliability and material characterization. He is also member of the Swiss Academy of Engineering Science (SATW) and in 2016 he was appointed adjunct professor at the University of Berne.

Abstract:

Composite materials have been attracting increasing attention as materials for tooth reconstruction. In medical technology the ceramic reinforced polymers offer a wide range of opportunities. Specific advantages of this composite materials are their robustness, properties for biocompatibility which make them so appealing for tooth reconstruction. For tooth reconstruction, however, not only new manufacturing processes but also appropriate non-destructive testing and characterization tools are required. The presentation concentrates on a novel technique that has demonstrated great potential for non-destructive testing (NDT) and non-destructive evaluation (NDE). This method uses the Talbot-Lau grating interferometer principle. It enables X-ray insights extended by two additional contrast mechanisms: X-ray Phase Contrast Imaging (XPCI) and Scatter Dark Field Imaging (SDFI) [1-3]. Conventional radiographic systems, based on the absorption of x-rays in the sample, have limited contrast for light materials such as polymers and biological tissues. XPCI, on the other hand, is able to reveal subtle changes in the microstructure of the samples, such as micro-cracks in composite.

Biography:

R A Shakoor is currently working as Assistant Professor in the Center for Advanced Materials (CAM), Qatar University, Doha, Qatar. He holds a PhD degree in Materials Engineering. His area of research focuses on the synthesis and characterization of advance materials for various applications. He has been awarded with several academic and professional awards because of his outstanding academic, industrial and research achievements. His research work has been published in high impact factor international journals like JACS, Adv. Functional Mater. etc., with decent number of citations. He likes to share his important findings with local and international research community.

Abstract:

Significant advancement in the processing technology has enbaled to synthesize homogenous metal matrix nanocomposites having uniformly distributed nanoreinforcements. As a result, remarkable enhnacement in the properties of metal matrix nanocomposites has been claimed. In present work, Si3N4 nanoparticles reinforced aluminium matrix composites (Al/Si3N4) containing different volume fractions (0.3, 0.6, 0.9 and 1.2 vol.%) of Si3N4 were fabricated using microwave sintering process. The Powders of Al and Si3N4 with exact stoichiometry ratios were intimately mixed through high energy ball milling (200 rpm, 2 hours) and were consolidated at room temperature (450 MPa for 2 min). The compacted cylindrical billets (diameter-30mm) were then sintered (550°C) using microwave sintering approach. Thereafter, the developed Al-Si3N4 nanocomposites were extruded (350°C) into rods (diameter-8mm) and their physical, structural, thermal and mechanical properties were investigated. In addition, the effect of Si3N4 volume fraction on the properties of Al/Si3N4 nanocomposites was also studied.

Biography:

Frédéric Aguesse received his PhD degree from Imperial College London in 2012, where he worked on functional ceramics and thin films. In February 2012, he started as a Post-doctoral Researcher, and then Associate Researcher (2015), at CIC EnergiGUNE (Spain) on ceramic materials for all-solid state batteries and post-mortem analysis of battery packs and full cell level. He works in developing all-solid state batteries and dedicates his skills for the development of ceramic materials with highly conductive Li-ions properties and their implementation in electrochemical devices.

Abstract:

The next generation of energy storage devices will rely on safe systems with increased energy density for stationary and mobility applications. An adequate combination of electrode materials with solid electrolyte in an all-solid-state battery could challenge the current technology. However, significant issues such as reliability and performances at high current rates still need to be overcome for practical application. Ceramic electrolytes such as Li-stuffed garnet materials are a good electrolyte candidates as they offer some of the highest Li-ion conductivities among solid electrolytes and good chemical compatibility with Li metal and oxide based electrode materials. We will report on the high Li-ion mobility of Ga-doped Li7-La3Zr2O12 ceramic electrolyte, whose properties are strongly dependent on its synthesis route and processing. This material exists in two polymorphs: a tetragonal phase with low ionic conductivity (10-6 S/cm) but thermodynamically stable and a cubic phase presenting higher ionic mobility (10-4 S/cm). Partial substitution of Li+ by aliovalent dopants such Ga3+ forces the disordering of Li+ and ensures stabilization of the cubic phase. Additionally, a good control of the processing environment (ultra dry O2) is crucial to obtain dense ceramics with the fastest conductivity reported so far (10-3 S/cm). The suitability of the developed Li-stuffed garnets as electrolytes for Li-ion batteries will be discussed. Battery applicability requires multi-component compatibility. Using a full device structure, the stability of the garnet electrolyte with Li metal electrode will be analysed and the limitations of the ceramics in an all-solid-state battery will be discussed.

Biography:

Saied Elghazaly has completed his PhD from the department of metallurgy and materials, University of Miskolc, Hungary, 1983. He is now Emeritus Prof. and expert in steel alloys and composites in CMRDI. He has more than 53 publications in reputed journals and conferences.

Abstract:

Good combinations between strength and toughness are always the aim of all researchers working in the field of material science. Unfortunately strength and toughness of materials are alloys counter acting properties. However; carbon contents in the steel define to a great extent its strength and toughness. In this research an effort is paid to produce steel alloy composites that can give higher strength together with good toughness without alloying with carbon. The mechanism of strengthening in Fe-Mo-W and Fe-Co-W composite systems is studied; however variations in Co and W contents in these alloys are investigated. The fracture toughness, axial fatigue and strength are measured for all alloy composites under investigation. The changes in microstructures after heat treatment are emphasized using SEM and TEM microscopy.

Biography:

Kausar Javed Khan has completed her PhD from Lahore College for Women University, Jail Road, Lahore, Pakistan. During PhD studies, she has prepared magnetic garnet series. She has done her MPhil in Solid State Physics from Centre of Excellence at Punjab University, Lahore, Pakistan. She currently holds the position of Assistant Professor at Gulberg College for Women, Lahore. She is also a visiting Professor at FCC Chartered University, Lahore, Pakistan. She has also done Master’s in English Literature from University of Punjab, along with a Master’s in Educational Planning and Management.

Abstract:

YIG (Yttrium Iron Garnet) is magnetic ferrite having chemical formula Y3Fe5O12 and high resistivity. Substituted YIGs have formula RexY3-x Fe5O12, where R represents rare earth elements. Polycrystalline cylindrical (13 mm x 3.3 mm) six samples of Holmium substituted YIG (HoxY3-xFe5 O12) were prepared by Conventional Ceramic Technique. Powder samples were annealed at 1000◦C (1 hour) and these were called green powders. The crystalline structure and dielectric properties of samples were studied by D8 Discover X-Ray Diffractometer and Wayne Kerr Impedance Analyzer. Microstructural properties like crystallite size, dislocation density, micro-strain were calculated using XRD data. Dielectric parameters were studied with reference to changing Holmium composition and changing frequency comprehensively. Both dielectric constant (Ɛ’) and Dielectric Loss (Ɛ’’ ) decreased sharply with the increase of frequency at Room Temperature (300k).The decreasing trend in Dielectric Parameters was observed with the increase in Holmium contents . This series of Substituted YIG having small dielectric constant, low dielectric Loss and negligible Tangent Loss can play the most vital role in many electronic devices in microwave region. Small dielectric parameters exhibited by these prepared magnetic garnets make them highly useful in telecommunication and defense industry.

Biography:

B Stawiszynski worked as a Research Engineer at the Institute for Machine Tools and Factory Management in Berlin, Germany. In the gruop of tool technology he focuses on PVD coatings for hard machining and the use of diamond coated ceramics for the machining of CFRP.

Abstract:

Chemical Vapor Deposition (CVD) diamond coated tools are currently successfully used in many applications, for example in the cutting of thin foils, paper and textiles, machining of non-ferrous materials and pressure forming. With the use of cemented carbide as a substrate for diamond synthesis it has to be ensured that the cobalt does not initiate a catalytic reaction of diamond to graphite, this requires a time-intensive and costly pre-treatment process. Because of their chemical composition ceramics do not have these disadvantages and as such possess large potential as substrate materials for diamond coatings. Silicon based ceramics have a high hardness and heat resistance combined with good toughness and thermal shock properties. Currently, there are few scientific studies that investigate the tribological wear resistance of diamond coated silicon nitride ceramics. In this contribution conventional cemented carbide and diamond coated silicon nitrides are studied in model wear and machining tests. Their wear resistance to abrasive and adhesive wear is compared to coated cemented carbides. In addition, the grindability of the ceramics is examined in order to determine which substrates are suitable for a reliable production process for cutting tools. After evaluating the results of plane ceramic samples, milling tools were manufactured, coated with CVD diamond and tested in the machining of fibre reinforced components.

Biography:

Yu Chen has completed his PhD from Sichuan University (SCU) of China. At present, he is a Lecturer and a Post-doctor in the School of Aeronautics and Astronautics at SCU. He has published more than 15 papers with respect to function ceramics and their composite materials in reputed journals and has been serving as a reviewer of Materials Research Bulletin.

Abstract:

In order to protect carbon/carbon (C/C) composites from oxidation at high temperature, a nano SiC-MoSi2 (SiCn-MoSi2) coating on SiC pre-coated C/C composites was prepared by a novel hydrothermal electrophoretic deposition process. The phase composition, surface and cross-section microstructure, anti-oxidation and thermal shock properties of the as-prepared SiCn-MoSi2/SiC coating were investigated. The as-prepared multilayer coatings exhibit excellent oxidation resistance and thermal shock resistance, which can efficiently protect C/C composites from oxidation at 1773 K in air for 270 h and undergo at least 40 thermal cycles between 1773 K and room temperature. The failure of the coating is observed firstly happen at the interface of the multilayer coating and C/C matrix after oxidation at 1773 K for 300 h.

Biography:

M Shabani is a PhD candidate of Materials Science & Engineering at University of Aveiro in Portugal. He has studied about metal matrix composite materials processing and characterizing for structural applications during his MSc at Shiraz University in Iran. After his MSc, he worked in oil and gas industry as welding and corrosion engineer for the pipelines. Prior to starting his PhD, he worked on nanocrystalline ceramic coatings on Ti–based alloys for biomedical applications. His current research interests during his PhD focus on development of nanocrystalline superhard coatings on ceramic materials for heavy duty machining of hard materials.

Abstract:

In the present work, pure Cu and Cu/SiCp metal matrix composites were prepared by sintering and sinter–forging processes. The tribological behaviour of copper and Cu/SiCp composites was studied using a pin–on–disk tester. The influence of SiC particles and fabrication type on the tribological behaviour of pure Cu and Cu/SiCp metal matrix composites were studied. Dry sliding wear tests represented that the composites with 60 vol. % SiC exhibits a lower wear loss compared to other compacts. This was due to the reinforcing SiC particulates being effective to reduce the extent of wear deformation in subsurface region during sliding. Moreover, the results indicated that applying external compressive force during the sintering process of Cu and Cu/SiCp compacts has an important effect on reducing and eliminating porosities and reach to a high final density. Therefore, wear loss of the samples produced through sinter–forging process was improved significantly compared to conventionally sintered samples.

Biography:

Dr Angéline Poulon is an associate professor at the University of Bordeaux and ICMCB. She has a long experience in the correlation between process parameters, microstructure and properties of structural and functional materials. Her current interests range from the search for innovative multifunctional coatings more exactly hard coatings, for applications in energy, aerospace and aeronautical industries. She is a specialist in fine characterisation with an extended recognized experience in electronic microscopy and physico-chemical techniques. She has co-authored 27 peer-reviewed articles, 33 oral presentations, 9 invited conferences and 3 patents.

Abstract:

Biphased thin film coatings of silicon and titanium dioxide are investigated to combine optical properties of transparency and mechanical properties of hardness. The aim is to obtain a composite material with properties similar to vitreous silica and with the photocatalytic properties of titanium dioxide. We explore the opportunity to employ different innovative processes: a co-sputtering technique working in DC reactive pulsed sputtering and a supercritical fluid deposition technique. The optical, mechanical properties and microstructures are estimated and compared with those of coatings presenting the same composition but elaborated using conventional magnetron sputtering process. Our results bringing new insights on the DC reactive pulsed sputtering and supercritical fluid deposition processes that could lead to significant advances on surface treatment and coating of industrial glass.

Biography:

Dr. Chiung-Fen Chang is a professor in department of environmental science and engineering. Her interests focus on the development of nano-composite as electrodes and magentic materials as sorbents and photocatalysts. In addition, she also devotes herself to exploring the occurrence and fate of emerging contaminants in surface waters as well as the advanced treatment of polluted waters. Zih-Jyun Chen is a graduate student and making an electrochemical research in Tunghai University. The field of research involving the synthesis of promising electrode materials, and the application in treatment processes of organic pollutants via direct electrochemical oxidation.

Abstract:

Electrochemical oxidation involving hydroxl radical generation is a greener way to remove bioresistant organics in aqueous solution. The removal process does not need auxiliary agents if the used electrode is effective. The activity of the electrode is principally dominated by the electrode materials. In this study, a novel composite based on the carbon nanotubes was synthesized and further applied on the degradation of organic compound of phenol. The growth step of carbon nanotubes on carbon fiber (CF) was via catalytic chemical vapor deposition (C-CVD) to obtain a base electrode (CNTs/CF). CNTs/CF material further prepared with alloy RuPt catalyst to synthesize RuPt-CNTs/CF electrode. The properties of RuPt catalyst and PtRu-CNTs/CF electrodes was determined by transmission electron microscopy (TEM), X-ray diffraction (XRD) and Cyclic Voltammetry (CV). TEM morphology pictures proved that the synthesized catalysts and CNTs belonged to nanoscale. XRD patterns displayed crystal characteristics of electrocatalysts. The heating rate was used to investigate the dispersion of PtRu nano-particles. The results of CV indicated that PtRu-CNTs/CF possessed higher capacitance of 2.48×10-2 F cm-2. The electrochemical oxidation of phenol was conducted in sulfuric acid media. The oxidation efficiency of phenol increased when concentration of electrolyte decreased. Mineralization efficiency of phenol was also detected during oxidation processes. The highest rate constant of 0.0419 min-1 by means of pseudo-first-order equation was obtained in 0.01 M H2SO4 electrolyte. This study gave evidence that CNTs supported electrode were successfully synthesized and PtRu-CNTs/CF was promising electrode materials for phenol treatment in electrochemical process.

Biography:

Wenbo Yu has completed his PhD from Universite de Poitiers and did Post-doctoral studies in Tsinghua University School of Material Science and Engineering. He has published more than 9 papers in reputed journals. He mainly works on MAX phases and SiCf reinforced composite.

Abstract:

In this work, as the biotoxicity of vanadium element in TC4 has limited it biomedical applications. Recently, nanolaminate ternary MAX phases (M for early transition metal, A for A-group element, and X for either carbon or nitrogen), combining metal-like and ceramic-like properties are able to restore mechanical damages by crack healing similarly to a biological healing process. In other words, at relatively high temperatures, the outward diffusion of A-element from MAX phases could heal millimeter-sized cracks through the formation of intermediate solid phases resulting from the oxidation of the diffused A-element. Ti2SnC, as one of MAX phases, was successfully welded to Ti6Al4V (TC4) through Cu interlayer in Ar atmosphere at low temperature 750ºC during 1h under an applied mechanical pressure 10MPa. Until now, this adopted temperature is lowest in the published diffusion bonding work of MAX phases. The results indicated that the outward diffusion of Sn from Ti2SnC played a critical role in the chemical composition of joints. With the increasing processing time, Sn atoms migrated and accumulated adjacent to TC4 side as diffusion of Ti into Cu-Sn is effective to decrease the activity of Sn. After 60 mins, the reaction layers consisted of five zones: interleaved β-Cu(Sn) and α-Cu(Sn) zone zone (V), enriched Sn and CuTi0.5Sn0.5 intermetallic phase (IV), poor Sn, Ti and rich Cu zone (III), Ti3Cu4 intermetallic (II) and β-Ti (Cu) phase (I). Shear test results showed that the average shear strength reached 85.7±10 MPa. Corresponding fractographs indicated that the crack mainly propagated along Ti2SnC substrate adjacent to the bonding zone, accompanied with an intergranular fracture mode.

Biography:

Yan Huang is a Senior Lecturer in Materials Science at Brunel University London. He obtained his PhD degree in 1990, and served till 1996 as a Lecturer/Associate Professor in Northeastern University, China. Before joining Brunel in 2010, he worked as a Technical Director at Confae Technology Ltd., from 2004 to 2010 and as a Research Associate/Fellow at the University of Manchester from 1996 to 2004. He has extensive experience in physical metallurgy and metallic biomaterials and published over 100 peer reviewed journal papers and conference proceedings.

Abstract:

Mg and its alloy have shown great potential for orthopaedic and cardiovascular applications due to their excellent biocompatibility and biodegradability. However, they corrode too quickly in vivo, which limits their clinical use. Hydroxyapatite (HA) is a natural bone component and the addition of HA into Mg alloys has been demonstrated to enhance corrosion resistance. In the present work, Mg/HA nanocomposites were designed based on a new concept of corrosion protection mechanism and fabricated by a novel casting-deformation route, which combined high shear solidification and severe plastic deformation. High purity Mg-2Zn-0.1Mn-0.5Ca (wt%) was used as the matrix alloy and HA nanoparticles of 30-50 nm in diameter were added into the matrix melt by using a rotor stator mixer, which rotated at 5,000-20,000 rpm during mixing. Cylindrical composite ingots (60×100 mm) were cast in a steel mould at a mixing and pouring temperature of ~670ï‚°C. The as-cast composite ingots were then extruded at 350ï‚°C into a square bar with a cross-section of 15×15 mm, which were further deformed by equal channel angular extrusion (ECAE). Optical and electron microscopy was carried out to characterize the microstructure of the fabricated Mg/HA nanocomposites. Mechanical properties were tested by uniaxial compression tests at room temperature. Polarization and immersion tests were conducted in the Hank solution at 37ï‚°C, according to ASTM-G31-T2, to study the in vitro corrosion behaviour of the material. The fabricated Mg/HA nanocomposites exhibited a fine grain structure and uniform global HA particle distribution with largely enhanced both mechanical properties and corrosion resistance.

Biography:

Sheng Lu is a Professor of Jiangsu Universit of Science and Technology (China) and the dean of School of Materials Science and Engineering.He completed his PhD from Southeast University (China) and postdoctoral studies from McMaster University (Canada). Current work involves synthesis and characterization of novel ceramic coatings, friction stir wilding and electronic packing. He has published more than 100 papers in reputed journals.

Abstract:

Micro-arc oxidation (MAO) surface treatment technology is able to in-situ form ceramic coatings on the surfaces of aluminum, magnesium, titanium and their alloys by a plasma electrochemical method to enhance surface properties, such as strength, hardness, wear and corrosion resistance. In the present work, MAO coatings on ZK60 magnesium alloys were formed in a self-developed dual electrolyte composed of sodium silicate and phosphate under two–step decreasing current mode. Micro-structure morphology, element and phase structure of MAO coatings were investigated using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), confocal laser scanning microscopy (CLSM), X-ray photoelectron spectroscope (XPS) and X-ray diffraction (XRD). Furthermore, immersion test and friction wear test were employed to evaluate corrosion and abrasion resistance, as well as surface roughness and hardness of the coatings. The in-depth investigation was also focused on the inward and outward growth process, forming mechanism of micro-pores and distribution feature of dense layer and loose layer to achieve a comprehensive understanding on the growth mechanism of MAO coating.

Biography:

Hans J Seifert is the Head of the Institute for Applied Materials (IAM-AWP) at the Karlsruhe Institute of Technology (KIT) and Professor of Material Science and Engineering since 2011. He received his PhD in Material Science from University of Stuttgart, Germany, in 1993. He then served as a Research Group Leader at MPI for Metals Research, Stuttgart. From 2001 to 2003, he worked as a Senior Coating Expert for Alstom and from 2003 to 2006 as an Associate Professor at the MSE Department of the University of Florida. In July 2006, he was appointed as Professor by TU Freiberg, Germany.

Abstract:

For next generation power plants and gas turbines, Si-based Ceramic Matrix Composites (CMCs) are promising structural materials for the hot sections. However, the presence of water vapor in e.g. combustion gases may lead to the formation of gaseous hydroxides which cause the volatilization of protective SiO2 scale. The resulting severe material recession necessitates the application of environmental barrier coatings (EBC). In this regard, combinations of yttrium silicates and yttrium oxide or silicon dioxide are most promising EBC materials, and it is necessary to understand their behavior at high-temperature and in O2/H2O containing combustion atmospheres. In this work, the CALPHAD (CALculation of PHAse Diagrams) method in combination with key experiments was used to develop a thermodynamic dataset for the multi-component Y-Si-C-O-H system. By this, the equilibrium heterogeneous reactions between EBC and various gas atmospheres can be assessed. An existing thermodynamic description of the Y-Si-C-O system was refined by updating the description of the Y2O3-SiO2 pseudo-binary system and new descriptions of the Gibbs free energies of the silicon- and yttrium-hydroxides were developed based on experimental data from the literature. The updated thermodynamic description of the Y-Si-C-O-H system was used to calculate the thermochemical reactions between the yttrium silicate based coatings and the SiC base material as well as with the O2/H2O containing combustion atmosphere. The stabilities of yttrium silicate based coatings against erosion through formation of volatile silicon- and yttrium hydroxides was thereby evaluated.

Biography:

Q Zou has completed her PhD from Kochi University of Technology. She has published more than 40 papers.

Abstract:

Ti3SiC2-Cu alloy matrix composite (T-Cu) of brake pad was fabricated through partly replacing flake graphite in graphite-Cu alloy matrix composite (G-Cu) of brake pad with Ti3SiC2 particle as antifriction component. Friction and wear properties of T-Cu and G-Cu composites were measured in order to investigate the effect of Ti3SiC2 and obtain the effect differences of Ti3SiC2 and flake graphite on them. Friction coefficients of G-Cu and T-Cu decreased as applied loads increased from 100 N to 400 N within 900 s. Friction coefficients of T-Cu were 1.5-2 times as those of G-Cu in the same conditions. Friction coefficients of T-Cu increased slightly with measured time increase, while the G-Cu’s was almost constant. T-Cu showed relatively stabler average friction coefficients than those of G-Cu from room temperature to 500℃ measured in the conditions of 200 N load, 1.2 m/s speed and within 900 s. Average wear rates of G-Cu and T-Cu decreased with applied load increase. Worn surfaces of T-Cu were smoother than those of G-Cu after being worn. Wear resistance of T-Cu was better than that of G-Cu. Ti3SiC2 had superior properties and distributed evenly in Cu alloy matrix. Interdiffusion of Ti3SiC2 and Cu alloy matrix enhanced their combination and prevented Ti3SiC2 fall off easily from Cu alloy matrix. Lubricant films were formed on T-Cu surfaces consisting of Ti and Si oxides, which effectively improved T-Cu oxidization resistance. Thus comprehensive properties of T-Cu were better than those of G-Cu.

Biography:

Wenbo Yu has completed his PhD from Universite de Poitiers and did Post-doctoral studies in Tsinghua University School of Material Science and Engineering. He has published more than 9 papers in reputed journals. He mainly works on MAX phases and SiCf reinforced composite.

Abstract:

In reference to the well-evolved outer keratin layer of the turtle shell composed of multi-layered collagen-fiber-reinforced layers, a bio-mimicking SiCf-reinforced Ti-intermetallic multi-layers was successfully fabricated. The initially Ti and Al foils were firmly bonded to each other through the formed intermetallic phases layers. Additionally, SiC fibers and Ti were connected by TiC compound formed through the reaction between Ti matrix and deposited C coating on SiC fibers. Along the longitudinal direction of the SiC fibers, the ultimate tensile, flexural strengths and fracture toughnesses of the hybrid composite have increased of 53%, 105% and 70%, compared to the Ti-intermetallic multi-layers composite. In situ observation indicated that cracks were always initiated in the intermetallic region, the crack propagating paths are significantly changed and the length of cracks is visibly prolonged through crack deflection and crack blunting. Due to the strong interfacial connection between SiC fibers and Ti matrix through a circular joining of TiC, the broken SiCf pieces could strengthen the Ti matrix. Herein, the curve of hybrid composite presents one long plateau after the yield point, other than the Ti-Al intermetallic multilayers. Therefore, due to these mechanisms, the bio-mimicking hybrid composite shows an excellent damage resistance.

Biography:

Nehal Elkhoshkhany is assistant professor of solid state physics. She has completed her PhD at the age of 38 years from Menofia University and postdoctoral studies from Alexandria University, Material Science Department, Institute of Graduate Studies and Researches. She is the director of Glass and Ceramic laboratory. She has published more than 10 papers in reputed journals. She is founding member in "The Arab Society of Materials Science".

Abstract:

Quaternary tellurite glass systems in the form ((75-x) TeO2 - 20ZnO-5Na2Co3 - xEr2O3) glass samples with 0≤ x≤ 2.5 mol %) have been prepared by the melt quenching technique. Density, molar volume and oxygen packing density of every glass composition have been measured and calculated. Differential Scanning Calorimetry (DSC) have been carried out on the prepared glass systems in the temperature range 300-800 ºC at heating rate 10, 15, 20 oC/min. The glass transition Tg and crystallization Tc temperatures values were measured from DSC. Kinetics parameters like activation energy of relaxation structure Et , activation energy of crystallization Ec and order of crystallization have been calculated for every glass composition. Number of bonds per unit volume (nb) and average stretching force constant (have been calculated to interpret the experimental data). Transparent glass ceramics were prepared by controlled one step heat treatment method. The crystal structure was investigated by using X-ray Diffraction (XRD) and Scanning electron microscopy (SEM). The XRD results and SEM micrograph reveal the presence of two crystalline phases: α TeO2 and Zn2Te3O8 phases during the crystallization process of the prepared glass. Optical absorption studies are carried out on the glassy system in the wavelength range of 300– 900 nm. The cut-off wavelength λc, optical band gap Eopt, Urbach energy ΔE and refractive index n values were calculated. Also, different physical parameters such as, molar refraction RM, metallization criterion M, electronic polarizability of the oxide ion αo2- (calculated from Eopt) and optical basicity Λ have been determined.

Biography:

Mahdi Ghassemi Kakroudi has completed his PhD from University of Limoges, France. He is an Associate Professor of University of Tabriz, Iran. He has published more than 40 papers in reputed journals.

Abstract:

Because of strong covalent bonding, low bulk and grain boundary diffusion rates, high melting point and high vapor pressure, the sintering of ZrB2 usually needs high temperature and external applied pressure. At the first stage of this research, monolithic ZrB2 was hot pressed without using any sintering aid or secondary phase as the obtained relative density was about 92%. In this case, the final microstructure of ceramic faced with a fanatic grain growth. Hence, SiC particles were used to increase the density and improve the sinterability which is the most common additive in ZrB2-based composites. Due to the presence of SiC, some densification mechanisms such as mechanical interweaving, particles fragmentation and rearrangement, plastic deformation of grains and diffusion processes were activated and resulted in a higher density at 1850 °C. Using 200-nm SiC particles increased the driving force of the sintering as the theoretical density was obtained at 1850°C. The addition of 200-nm ZrO2 particles caused to an increased density through the reaction of ZrO2 and SiC which led to the formation of dense ZrC. The addition of carbon additives (graphite and graphene) led to achieving the full density at 1850°C via the chemical reactions with the surface oxide impurities on the starting powders.

Biography:

Ester Barrachina Albert is a Chemical Engineer specialized in Ceramics with more than 12 years of industrial experience, working as responsible of R&D Departments in two Spanish ceramic companies (2000-2012). She completed her PhD in 2011 at Universitat Jaume I in Castellón, Spain, being remarkable the technological nature of her PhD, developing important issues directly related to the real industrial challenges. Nowadays, she is member of the Research Group of the Solid State Chemistry in the Inorganic and Organic Chemistry Department at Universitat Jaume I and is focused on ceramics and glass-ceramics materials.

Abstract:

This work consists of studying the devitrification capacity of a residue from sodium-calcium frit, using the vitreous powder sintering method, which follows the traditional ceramic processing route, including a specific heat treatment to generate the appearance of crystals from the original glass phase. Initially the frit residue has been characterized by instrumental techniques such as XRF, XRD and DTA/TG. Furthermore, the chemical analysis (XRF) has allowed the prediction of devitrification potentiality of this residue by theoretical approaches represented by Gingsberg, Raschin-Tschetverikov and Lebedeva ternary diagrams. Then, this residue was subjected to traditional ceramic method, by changing the grinding time, the pressing pressure and prepared samples were obtained at different temperatures. In this part, the techniques for measuring particle size by laser diffraction and XRD and SEM to evaluate the generated crystalline phases, were applied. Finally, it has been found that this frit residue works as glass-ceramic precursor, devitrifying in wollastonite crystals as majority phase and without being subjected to the melting step of the glass-ceramic typical method.

Biography:

M Amlung has completed his PhD in 1998 in Chemistry at Saarland University and has been working since 1996 at INM – Leibniz-Institute for New Materials in Saarbruecken as scientific officer

Abstract:

Introduction: Glass-like coatings are used due to their excellent properties in a broad application field like drug delivery systems or as implant coating for bone repair. However these glass-like coatings can only be generated at relatively high temperatures that limit their application in temperature-sensitive areas. Therefore, new developments and further research is going on to provide useful coatings also in these fields, e.g., as coating for cardiovascular implants.

Methods: Two glass-like coatings have been developed and characterized. These coatings have been applied using the well-known sol-gel-technique and tempered at moderate temperatures in different atmospheres. Afterwards the biocompatibility using human umbilical vein endothelial cells (HUVEC) has been investigated.

Results: The developed glass-like coatings possess excellent optical, chemical, and biological properties. By altering the existing sintering atmosphere, the cellular growth could be selectively influenced in a positive and a negative way. Additionally the coatings have been proven to be of radiolucent nature that makes them attractive for different fields.

Conclusion: The developed glass-like coatings are promising coatings for a later cardiovascular application. A later usage as closing layer on thin, fine, and sensitive wires like stents is cogitable. First and foremost these coatings can contribute in a better acceptance of an implant in the human body.

Biography:

Csaba Hegedus received his general medicine degree from the Medical University of Debrecen (Hungary) in 1982 and his PhD degree in Medical Sciences from the University of Debrecen (UD) in 2000. He is currently a Full Professor and Head of the Biomaterials and Prosthetic Dentistry Department at the Faculty of Dentistry UD, and also the Dean of the Faculty of Dentistry UD since 2009. His research interest comprises dental materials, the analysis of interfacial systems in dentistry, the metal ceramic-bioceramic and implant surface modification.

Abstract:

Research on the possibility of using zirconia ceramics as biomaterials started about twenty years ago, and now zirconia (Y-YZP) is in clinical use in dentistry, but developments are in still continuing for application in other medical fields. Mechanical properties of zirconia relate to its fine grained, metastable microstructure. The expected performances are due to the stability of this structure during the lifetime of TZP component. TZP materials, containing approximately 2-3% mol Y2O3, are completely constituted by tetragonal grains with sizes of the order of hundreds of nanometers. Basic properties and clinical applications as implants for surgery are now described by the standard ISO 13356. Different zirconia products and their applications were tested (flexural strength, Kic, XRD, SEM). The Kic (MPa • m1/2) Kerox HD (12.97±1.2), Upcera (9.71±1.05), Crystal (10.68±1.28), Sagemax S (9.26±0.8), KeroxET (9.79±0.95), and the flexural strength (MPa) KeroxET 1415±160., Kerox HD 1365±145, Crysta 1267±105, Upcera 1255±145, Sagemax S 1172±135 was respectively. The clinical application of these new ceramics and technologies produced better esthetical effect, however there are not enough long term studies about these new technics. Newly proposed zirconia seems to have good biological and mechanical properties; further studies would be necessary to compare the new systems (zirconia toughened Al2O3, alumina toughened zirconia) and the different products.

Biography:

Salvatore Grasso joined the School of Material Science and Engineering (SEMS) at Queen Mary University of London in 2011 as experienced Researcher in Ceramics Processing. He performed his Doctoral work (2008-2011) at the University of Tsukuba-NIMS (National Institute for Material Science) Japan, where he received a Dean Award for Excellent Doctoral Thesis. His research work was been mainly focused on Spark Plasma Sintering (SPS) and other processes assisted by intense electrical (106A) and magnetic fields (>10T). Recently, he pioneered the development of Flash Spark Plasma sintering processes. At present he published 90 papers and 10 patents.

Abstract:

It is well know that due to both localized heating and the reduced sintering time in SPS processing can produce a significant energy saving and metastable microstructures if compared to Hot Pressing. In order to further improve the energy saving, we have developed a very rapid sintering technique called Flash SPS FSPS with heating rates of the order of 5-10 103 áµ’C/minute. Unlike the Flash Sintering based on high voltage, FSPS is based on low voltage and it can be up-scaled to sample volumes of several tens of cubic centimeters. Flash SPS allows densification of ZrB2 up to 95% under a discharge time as short as 35 seconds, which results in an energy saving greater than 95% compared to conventional SPS. A novel processing methodology that allows both preheating and FSPS of silicon carbide based materials (both of α and β SiC) has been developed. We were able to densify a SiC disc (Ф 20 mm) from initial density of 53% up 96% under a discharge time as short as 17s. The rapid densification (i.e. normalized displacement) of SiC by novel FSPS is compared to conventional SPS process. The developed methodology was up-scaled to samples as large as 60 mm. A novel route allowing full consolidation from loose powder to dense bulk in less than 30 seconds was also achieved. Following this recent work, we will present the first attempt of achieving materials flash sintered in contactless mode where the heating rate approaches 105áµ’C/minute. Results on other types of materials like permanent magnets and thermoelectrics (IP pending) is presented. A general understanding of the mechanism is proposed by using FEM simulation, TEM, SEM, ESR etc.

Biography:

Lucie Bacakova, MD, PhD, Assoc. Prof. has graduated from the Faculty of General Medicine, Charles University, Prague, Czechoslovakia, in 1984. She has completed her PhD from the Czechoslovak Academy of Sciences, and became Associated Professor at the 2nd Medical Faculty, Charles University. She is the Head of the Department of Biomaterials and Tissue Engineering, Institute of Physiology, Czech Academy of Sciences, Prague. She is a specialist for studies on cell-material interaction and vascular, bone and skin tissue engineering. She has published more than 200 papers in reputed journals (h-index 29).

Abstract:

Zeolites are microporous aluminosilicate minerals of natural or synthetic origin, which have been extensively used in various technological applications, such as adsorbents and catalysts, laundry detergents, molecular sieves for separation and sorting the molecules according their dimensions. These applications of zeolites were typically related with their porous character (i.e. inner surface, which is as large as ~102 m2/g), and also their ion exchange properties. Another promising field of application of zeolites is biotechnology and medicine, i.e. as alternative adsorbents of uremic toxins in blood purification by dialysis, as chromatographic carriers for purification of proteins and fractionation of cellular components, as potent hemostatics (due to their capacity to adsorb water), as therapeutics against tumors (due to their antioxidative effects), and also as carriers for drug and gene delivery. Fluorinated porous zeolite Y particles have been also incorporated in polymeric scaffolds for bone tissue engineering, where they acted as carriers for delivery of oxygen to cells. Synthetic sodium zeolite A added into cell culture media enhanced synthesis of transforming growth factor-, activity of alkaline phosphatase and production of osteocalcin in normal human osteoblast-like cells. In addition, the zeolite A inhibited bone resorption. In our studies, we concentrated on silicalite films for potential coating of bone implants, and we found that these films supported the adhesion, growth, viability and alkaline phosphatase in an extent similar or even higher than standard cell culture polystyrene dishes.

Biography:

Vladimir Buljak has completed his PhD at Politecnico di Milano in the year 2009. Currently, he holds the position of Associate Professor at the University of Belgrade and he is also in charge of a course Theory of Plasticity at Politecnico di Milano, as a visiting Professor. He has published more than 10 papers in reputed journals and one monograph on Inverse Analysis published by Springer. He is the scientist in charge for the University of Belgrade within the PF7 project CERMAT2.

Abstract:

Micro-cracking induced by cooling within polycrystalline ceramics with strong anisotropy of crystal thermal expansion is a well-acknowledge phenomenon. Formation of such cracks is directly affecting macroscopic elastic properties, as polycrystalline ceramics are presenting a drop in Young’s modulus value when cooled down from firing temperature. This effect can be numerically modeled, but the adopted approach has to be multi-scale, what makes it particularly challenging. This study presents some preliminary results, obtained considering a multi-scale model for thermally induced micro-cracking. Modeling of grain-boundary micro cracking is performed by insertion of cohesive elements. Developed numerical model is first used for qualitative analysis of the influence of grain size and their orientation to the macroscopic properties of polycrystalline ceramics. In a subsequent phase, a calibration procedure is designed based on inverse analysis in which macroscopic properties are used to calibrate parameters of cohesive crack model. Such approach is centered on a minimization of discrepancy function designed to quantify the difference between experimentally measured quantities and their computed counterpart. Resulting minimization problem is solved by a non-linear mathematical programming, using the quadratic form of discrepancy function. Results from preliminary computational exercises corroborate the conclusion that the employment of inverse analysis is advantageous in the present context. This methodology leads from experimental data to parameter estimates through computer simulation, connecting micro-scale parameter’s values to macroscopic properties of interest.

Biography:

Sergei Kulkov has completed his Graduation and Post-graduation in Physics department from Tomsk State University in the year 1975 and 1979 respectively. He has published around 150 articles, has 24 Russian patents and is the author and co-author of 6 books. He is a member of American Ceramic Society. He is a Professor of Material Sciences department and Head of the Department of Theory of Strength and Mechanics of Solids at Tomsk State University and also Head of Ceramics department at the Institute of Strength Physics and Materials Science of the Russian Academy of Sciences.

Abstract:

Applications of ceramics for biomedical usages had a special interest now. The most actively developed studies in this area are investigations of zirconia ceramic included in ISO register as a material for bone replacement. Ceramics based on zirconia stabilized with magnesium oxide is involved in protein synthesis and DNA processes, stabilization of DNA molecules, RNA and ribosomes. In this paper were studied pore structure and phase composition of ceramic composite material ZrO2(Mg)-MgO at different sintering temperatures. It has been shown that during sintering of porous ceramic were formed bimodal porosity structure with mean size 26-30 and 94-110 µm. It has been shown that main mechanical characteristics of the material were determined and it was shown, that they are close to the characteristics of natural bone tissues. Ceramic strength directly depends on microstresses and at high microstresses ceramic has a low strength. In vitro studies were shown that the tested materials are not cytotoxic, cultured MMS cells on the surface of the samples have high viability and osteogenic differentiation ability, and the presence of cell clusters in the pores of the samples may indicate their proliferation.

Biography:

Mojtaba Biglar is a PhD student at the Rzeszow University of Technology.

Abstract:

The main aim of this investigation is to manufacture the barium titanate powder by solid state, fabricate the barium titanate granulate material and finally sintered material in order to verify if this material can be successful utilised for manufacturing the general part of the stacked-disk multilayer actuators. The pellets were performed by spilling the mould for uniaxial pressing of the external diameter of 11.5 mm with BaTiO3 granulate of the weight of 0.6 g and uniaxial pressing under the pressure of 1 MPa. It was found that the values of water absorbability and the apparent porosity grow together with the maximal sintering temperature. To determine the grain size of sintered materials, photos of SEM microstructure of barium titanate after sintering were prepared. The microstructure is composed of both great grains of the dimension from 50 to 100 µm and smaller one of the dimension from 1 to 3 µm. The grains boundaries are very well foreshadowed and the only slender pores can be noticed in the photos. Although, in this approach the obtained microstructure of sinters is very similar to this presented in literature by other authors, in order to receive better result of the barium titanate dielectric constant, the microstructure of sinter must be improved in the direction of the smaller grains getting. In order to verify whether the special designed sintering curves brought the expected grains size of sintered material at high relative density, photos of microstructure and stage of densification were determined and the results were discussed.

Biography:

Eugenio Zapata-Solvas has completed his PhD studies on the role of grain boundaries in the plasticity of advanced ceramics at the University of Seville in 2008. Then, he carried out Post-doctoral studies about physical and chemical properties of UHTCs at Imperial College London and about flash sintering of advanced ceramics at the University of Oxford. He was a research fellow of the Materials Science Institute of Seville working on high temperature physical properties of UHTCs and new technologies for ceramics sintering. Since August 2015, he joined the Centre of Nuclear Engineering of Imperial College London as a Research Associate to work in MAX phase’s development for nuclear applications. He has published around 25 papers in indexed journals.

Abstract:

Electric current assisted sintering (ECAS) techniques, such as electrical discharge sintering (EDS) or resistive sintering (RS), have been intensively investigated for longer than 50 years. In this work, a novel system including an electrically isolated graphite die for Spark Plasma Sintering (SPS) is described, which allows the sintering of any refractory ceramic material in less than 1 minute starting from room temperature with heating rates higher than 2000ºC/min and an energy consumption up to 100 times lower than with SPS. The system alternates or combines direct resistive sintering (DRS) and indirect resistive sintering (IRS). Electrical isolation of the die has been achieved through the insertion of a film made of alumina fibers between the graphite die and the graphite punches, which are protected from the alumina fibers film by a graphite foil. This system localized the electric current directly through the sample (conductive materials) as in DRS and EDS, or through the thin graphite foil (non-conductive materials) as in IRS or RS and is the first system capable of being used under EDS or RS conditions independently, combining current concentration/localization phenomena. In addition, geometry elements of the graphite mold used for SPS, such as graphite mold wall thickness or graphite punch diameter, play an important role in the electric field magnitude during sintering. Furthermore, electric field for this novel geometry will be analyzed as well as tailorability of electric field in order to intensify the value of the electric field towards induced flash sintering in a SPS furnace.

Biography:

S K Sinha has completed his PhD in 1997 from Mumbai University (India) and Post-doctoral studies from Department of Physics, University of Padova (Italy). He is Associate Professor at BIT Mesra, a premier Engineering Institute of India. He has published more than 25 papers in reputed journals and has been serving as Editorial Board Member of Int. J. of Multidisciplinary Research and Modern Education.

Abstract:

Hydrixyapatite, abbreviated as HAP or HAp is an important material for orthopedic implants. However due to its weak mechanical strength, thin film of HAP is coated on metallic biomaterials like TiAlV alloy or SS. We propose to coat it on lighter weighted ceramic material alumina. HAP is prepared using sol-gel technique and deposited using dip coating process. Further this sample is implanted with inert ions like Ar to increase the adhesion. Ions energy is chosen such that maximum collisional energy is deposited at the interface of HAP and alumina (HAP/Al2O3). Ions are implanted with different ion doses. Functional groups of HAP were studied by FTIR and compound formation was studied by GXRD technique. Physical properties like variation in nanohardness, adhesion of the film and chemical properties like corrosion in Ringer solution before and after treatment will be discussed. Biological properties like variation in wettability, thrombogenicity and toxicity will be discussed. Scratch test is carried out to check the improvement in adhesion with respect to ion dose. Changes in surface morphology studied using SEM and AFM will also be discussed.

Biography:

Rupita Ghosh is currently pursuing her PhD (2012-present) from National Institute of Technology, Rourkela. She has completed her B Tech in Biotechnology in the year 2012 from West Bengal University of Technology. She has published 2 papers in reputed journals.

Abstract:

The use of Hydroxy-apatite bio-ceramics as restorative implants is widely known. These materials can be manufactured by pressing and sintering route to a particular shape. However machining processes are still a basic requirement to give a near net shape to those implants for ensuring dimensional and geometrical accuracy. In this context, optimizing the machining parameters is an important factor to understand the machinability of the materials and to reduce the production cost. In the present study a method has been optimized to produce true particulate drilled composite of Hydroxyapatite Yttrium Phosphate. The phosphates are used in varying ratio for a comparative study on the effect of flexural strength, hardness, machining (drilling) parameters and bioactivity. The maximum flexural strength and hardness of the composite that could be attained are 46.07 MPa and 1.02 GPa respectively. Drilling is done with a conventional radial drilling machine aided with dynamometer with high speed steel (HSS) and solid carbide (SC) drills. The effect of variation in drilling parameters (cutting speed and feed), cutting tool, batch composition on torque, thrust force and tool wear are studied. It is observed that the thrust force and torque varies greatly with the increase in the speed, feed and yttrium phosphate content in the composite. Significant differences in the thrust and torque are noticed due to the change of the drills as well. Bioactivity study is done in simulated body fluid (SBF) up-to 28 days. The growth of the bone like apatite has become denser with the increase in the number of days for all the composition of the composites and it is comparable to that of the pure hydroxy-apatite.

Biography:

Vasily Tarnopolskiy has completed his PhD in 2003 from Russian Academy of Sciences and Post-doctoral studies from Samsung SDI (S. Korea), Muenster University (Germany) and CEA (France). His interests include lithium-ion batteries, high-voltage cathodes, solid electrolytes, all-solid Li cells.

Abstract:

Today battery safety is one of the main problems blocking the market of electric vehicles. Toxic and flammable liquid electrolytes are responsible for most of the safety incidents including electrolyte leakage, ignition and cell explosion. It is critical to address such safety concerns when scaling up the battery size for use in electric transport and stationary applications. Solid lithium-ion conductors have granted much attention as candidates to replace liquid electrolytes in Li-ion batteries due to the following possible advantages: non-flammability, non-reactivity, higher thermal stability, absence of leakage, large electrochemical window, ease of miniaturization and excellent storage stability. However, solid-state Li-ion batteries have their issues: low ionic conductivity, difficult implementation and volume changes are some of the reported limitations. CEA LITEN has a broad experience in development of conventional Li-ion cells with liquid electrolyte. The studies of solid electrolyte implementation have been initiated to meet the demands of car-makers. Nowadays, a number of techniques have been reported in literature to incorporate solid electrolyte into the Li cell but still there is no commercial product. The main problems are the interfacial resistance due to poor contact between particles, chemical and electrochemical interactions between components of the cell. Our lab develops ceramic and glassy solid electrolytes to improve the battery safety and employ advanced electrode active materials. One of the amitious targets is to adapt the approaches from the world of ceramics to create a «one stone» dense Li-ion cell. In this study, two aspects of solid electrolyte implementation will be discussed: one relates to conductive membrane stabilization; another deals with composite electrodes. Ceramic Li7La3Zr2O12 having a garnet structure and softer Li10SnP2S12 are used as a solid electrolytes. These electrolytes have different physical properties which allows using different implementation methods.

Biography:

Chih-Kuang Wang has completed his PhD from National Cheng Kung University and Post-doctoral studies from Industrial Technology Research Institute (ITRI) in Taiwan. He is a staff member of the Department of Medicinal and Applied Chemistry and also the investigator working in the Orthopaedic Research Center (ORC) at Kaohsiung Medical University (KMU). He has published more than 40 papers in reputed journals, 5 kinds patent have been acquired, and 3 kinds patent application are in process.

Abstract:

The key advantages of a 3D printed biodegradable scaffolds are custom control of shape, porosity, pore connectivity, material composition, site-specific drug/growth factor delivery, and orientation. Another limitation in 3D printed parts is that the mechanical properties of printed objects do not always resemble the repaired tissue in terms of modulus, and strength. Improvement in mechanical strength often resulted in compromise in biodegradability or biocompatibility. Clinical reported that porous biphasic bioceramics of hydroxyapatite/-tricalcium phosphate (Hap/-TCP) can promote osteoconduction during new bone formation in in vivo experiments. However, the brittle nature of porous bioceramic substitutes cannot match the toughness of bone, which limits the use of these materials for clinical load-bearing applications. Fortunately, our novel methods to enhance mechanical properties are mainly based on the admixture of a combustible reverse negative thermo-responsive hydrogel (poly(N-isopropylacrylamide base) that burns away during sintering in the resulting object. This method can be regarded as functioning in a manner similar to the cold isostatic press (CIP) step before the powder sintering densification process. In other words, sintering densification is expected via free volume contraction, which will increase the mechanical properties after the formation of the porous bioceramics. We will develop the curved shape bioceramic block with interpenetrating channels for bone reconstruction. The study aimed to investigate the processing chain, the dimensional accuracy and the mechanical and physical characteristics of the implants.

Biography:

Tran Minh Thi has got his academic degree as an Doctor from the Institution, Faculty of Physics, Hanoi National University of Education, Hanoi city, Vietnam.

Abstract:

Polyvinyl pyrrolidone (PVP) is a conductive polymer having strong polarized carbonyl (–C=O) group, in which oxygen atom is able to coordinated bond with Zn2+ and Mn2+ ions on the surface of ZnS:Mn nanoparticles. Under the effect of ultraviolet radiation, electrons of PVP chains can be absorption, radiation transitions HOMO LUMO and then energy transfer to ZnS:Mn nanopartiles. This paper present the preparation process of PVP capped ZnS:Mn nanoparticles, in which ZnS:Mn nanoparticles were synthesized by co-precipitation method, after that they were dispersed in PVP matrix. Microstructure, morphology and average crystalline size of PVP capped ZnS:Mn (ZnS:Mn/PVP) nanoparticles were determined by X-ray diffraction pattern (XRD) transmission electron spectroscopy (TEM), thermal gravimetric analysis (TGA) and differential gravimetric analysis thermographs (DTG). Fourier transfer infrared absorption spectra (FT-IR). The results show that the capping of ZnS:Mn nanoparticles by PVP almost do not change crystalline structure with average particle size about of 3.6 – 4 nm. The optical properties of PVP capped ZnS:Mn nanoparticles were investigated by UV-Vis absorption spectra, photoluminescence (PL) and photoluminescence excitation (PLE) spectra. The capping of ZnS:Mn nanoparticles by PVP mass almost not change the peak position of bands characterized to absorption and radiation transitions of Mn2+ ions in PLE and PL spectra. But their intensities were changed according to PVP mass and the PL intensity increase stronger with appropriate PVA mass. From achieved experimental results, the absorption and radiation transitions of Mn2+ ions in PVP capped ZnS:Mn nanoparticles were studied and explained

Biography:

Saliha Ilican received her PhD degree from Anadolu University and is currently working in the same university. Her current research includes in the preparation and characteriaztion of nano-semiconductors and fabrication of their devices. She has published more than 73 papers in reputed journals.

Abstract:

As a wide-direct-band gap semiconductor with large exciton binding energy (about 60 meV), ZnO is one of the most promising semiconductor materials for the next generation of optoelectronic devices applications in nanodevices. Many useful methods have been used to prepare high quality ZnO thin films, such as, magnetron sputtering, metal-organic chemical vapor deposition, pulsed-laser deposition, molecular beam epitaxy and electrodeposition. Among these methods, the electrodeposition method has some advantages to prepare large area ZnO thin films at low cost and easy technology. Electrodeposition is well known for depositing metals and metallic alloys at the industrial level, with a wide range of applications from large area surface treatments (i.e. zinc electroplating) to most advanced electronic industries. In this study, undoped and boron (B) doped ZnO films were grown by electrochemical deposition onto p-Si substrates from an aqueous route. Aqueous solution of Zn(NO3)26H2O and hexamethylenetetramine (HMT) was prepared using triple distilled water. The different atomic ratios of H3BO3 were used as a dopant element. Electrodepositions were carried out in a conventional three electrode cell for the working electrode (p-Si), reference electrode (Ag/AgCl, sat.) and counter electrode (platin wire). The effects of B doping level on the structural, morphological and optical properties of B doped ZnO films were investigated by means of XRD, FESEM and UV spectrophotemeter, respectively. The optical band gap of the B doped ZnO film deposited on silicon substrate was determined using the reflectance spectra by means of Kubelka-Munk formula.

Biography:

Yasemin Caglar has completed his PhD from Anadolu University and is a Full Professor of Solid State Physics at Anadolu University. She is currently interested in the areas of semiconductors devices, nanoelectronics, organic electronics, metal oxide materials. She has published more than 76 papers in reputed journals, has presented 142 presentations in national/international conference and has been serving as the Editorial Board Member of repute.

Abstract:

Transparent conducting oxides having a wide band- gap (>3.0eV) are being used extensively for photovoltaic and optoelectronic devices. The physical characteristics of ZnO can be successfully optimized by doping as well as optimizing the various processing conditions. Among them, doping of ZnO with Ni is interesting as these tend to improve its optical, electrical, morphological and structural properties. In this work, we present the study on the variation on the Nickel content on the crystalline quality and optical properties of ZnO obtained by microwave chemical bath deposition (MW-CBD) on to n-Si substrate. The p-Si substrates were cleaned using the suitable procedure. 0.1 M zinc nitrate hexahydrate (Zn(NO3)2.6H2O;ZnNt), nickel nitrate hexahydrate (Ni(NO3)2.6H2O;NiNt) and an equal molar concentration of hexamethylenetetramine (C6H12N4;HMTA) were dissolved in DI water. Doping precursor various amount of NiNt added separetly into the aqueous ZnNt+HMTA solutions. The solution was stirred 2 h at 90°C. After, solution was irradiated using a temperature-controlled microwave synthesis system at 600 and irradiation times 10 min. The films were washed with DI water to remove the remaining salt. Finally, the films were dried at 60oC for 1 h. Structural characterization of the layers was carried out using X-ray diffraction (XRD). Field emission scanning electron microscope (FESEM) was used to analyze the surface morphology of the ZnO films. The diffuse reflectance spectra of the Ni doped ZnO films were measured and the optical band gap values were determined using Kubelka–Munk theory.

Biography:

Mujdat Caglar is a member of the Physics Department of the University of Anadolu. He studied Condensed Matter Physics at University of Anadolu, starting in 1997. His academic and research interests are in the areas of nanomaterials, nanoelectronics, organic electronics, metal oxide materials. He has published more than 79 papers in international scientific journals and has been serving as the Editorial Board Member of repute.

Abstract:

Semiconductor nanorods represent a novel class of materials structure with a number of interesting properties that give them potential applications in optoelectronic devices, including light-emitting diodes (LEDs), photoelectrochemical systems, and solar cells. A chemical bath deposition (CBD) is attracting attention as low-cost film formation processes. In these processes, nucleation and crystal growth on substrate in solution result in the formation of metal−oxide films. We present a fundamental experimental study of a microwave assisted chemical bath deposition (MW-CBD) method for Mg doped ZnO films. The MW-CBD method was used to prepare nanorod Mg doped ZnO (1% and 10%) films onto p-Si substrates. Zinc nitrate hexahydrate and magnesium nitrate were the precursor materials and doping source materials. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) spectroscopy had been used to analyze the morphological properties and structures of this films products, respectively. The current density–voltage characteristics (I–V) of the diodes were measured at room temperature. The important junction parameters such as series resistance (Rs), the ideality factor (n) and the barrier height (b) were determined by performing different plots from the forward bias I–V characteristics. Norde function was compared with the Cheung functions and it is seen that there is a good agreement with both method for the series resisance values.

Biography:

Xinli Tian completed his PhD from Mechanical Engineering Department of Tianjin University in1996 and Post-doctoral studies from Jilin University in 1998. He is the Professor and Doctoral tutor of National Key Laboratory for Remanufacturing Technology, Academy of Armed Forces Engineering. He has engaged in the basic and applied research in the field of high efficiency and low cost precision machining of engineering ceramics over the years. He has published more than 200 papers in domestic and foreign core journals and 87 of them can be searched by SCI or EI. He has published 6 monographs as the chief editor. He has obtained the authorization of 10 national invention patents as the first applicant.

Abstract:

Edge-chipping referred to the fact that the edges of hard, brittle materials are easily broken during processing. This problem has brought many difficulties to their quality control. In fact, it was that the machining process itself destroyed materials, even though it could be controlled. Based on this principle, a new machining technology based on crack propagation driven by edge-chipping effect was proposed here. Multiple flanges caused by the cutting could increase the number of edges. Additionally, the fracture defects were prefabricated on the surface of flanges. When the turning tool made of cemented carbide came into contact with the surface of the ceramics, under the intermittent impact. The fractures were generated on the sides of flanges contacted with the tool and the prefabricated micro cracks were expanded rapidly under this three-dimensional stress field applied externally by the tool. In addition, due to the stress release toward the free surface, the cracks would expand to the surfaces of newly generated edges and the chips would be broken off continuously, resulting in irregular edge-chipping and removal of material pieces. Furthermore, based on the spatial distribution of grayscale images, the surface quality after rough processing under the different conditions was reasonably reflected with the grayscale co-occurrence matrix (GLCM). With the new processing technology, these cracks became advantageous under specific conditions. Therefore, the high external energy and ultra-hard tools required for the traditional processing technologies could be significantly reduced and the ceramics could be removed with less energy consumption and the tools with the hardness of lower than its own one. Therefore, it not only could reduce the processing costs, but also could promote the extensive applications of engineering ceramic materials.

Biography:

Ajay Kumar Mishra has completed his PhD from Delhi University and Post-doctoral studies from University Free State and University of Johannesburg at the Department of Chemistry. He is also working as “Adjunct Professor” at Jiangsu University, China which is a well known University in China. He has published around 100 papers in reputed journals and has been serving as an Editorial Board Member of repute.

Abstract:

This workshop will be mainly focused mainly on various nanoceramic materials and its applications. This will generate a common ground for the researchers to share ideas. The interest in the area is growing due to excellent materials with unusual materials properties by manipulating the length scale in the nano range. This results in better performance materials with new applications and various areas.

It is well known that any new research and breakthrough in such emerging research area needs focused discussion what potentially can enables to new ideas and also in networking by international meeting in the form of workshop. Workshop may lead to structure-property relationship to nanoceramic materials.  In the technical session various aspects of nanoceramics at the research level on production and various other applications will be discussed together with the discussion with eminent scientists.

Biography:

Jihui Yang has completed his PhD in 2000 from University of Michigan. Jihui Yang is currently the Kyocera Associate Professor at Materials Science and Engineering Department of the University of Washington, Seattle, Washington. Prior to joining the University of Washington in the Fall of 2011, he was a Technical Fellow and Lab Group Manager at GM Research and Development Center, responsible for leading GM’s research on Li-ion battery materials and systems; as well as advanced thermoelectric materials and technology development.

Abstract:

Introducing guests into a host framework to form a so called inclusion compound can be used to design materials with new and fascinating functionalities. The vast majority of inclusion compounds have electropositive guests with neutral or negatively charged frameworks. Here, we show a series of electronegative guest filled skutterudites with inverse polarity. The strong covalent guest-host interactions observed for the electronegative group VIA guests, i.e., S and Se, feature a unique localized “cluster vibration” which significantly influences the lattice dynamics, resulting in very low lattice thermal conductivity values. The findings of electronegative guests provide a new perspective for guest-filling in skutterudites, and the covalent filler/lattice interactions lead to an unusual lattice dynamics phenomenon which can be used for designing high-efficiency thermoelectric materials and novel functional inclusion compounds with open structures.

Biography:

Ajay Kumar Mishra has completed his PhD from Delhi University and Post-doctoral studies from University Free State and University of Johannesburg at the Department of Chemistry. He is also working as “Adjunct Professor” at Jiangsu University, China which is a well known University in China. He has published around 100 papers in reputed journals and has been serving as an Editorial Board Member of repute.

Abstract:

Silicon carbide (SiC) nano-materials are widely investigated due to their unique and fascinating properties such as high strength, good creep, oxidation resistance at elevated temperatures, chemical inertness, thermal stability and resistance to corrosion. Numerous applications of SiC nano-materials such as their use as semi-conducting devices, for reinforcement in ceramic composites, in metal matrix composites and catalytic supports have been investigated worldwide. Sol-gel process combined with the techniques such as polymer blending is used to fabricate the organic-inorganic hybrid materials for the production of composite nano-materials such as SiC. In the sol-gel process and polymer blend technique, sol-gel derived silica was blended with coal tar pitch, polypropylene-polystyrene blend and polycarbonate to yield silicon carbide nano-fibers. Unbleached and bleached soft wood pulps were used as templates and carbon precursors to produce SiC nano-rods. Hydrolyzed tetraethyl ortho-silicate, silicic acid was infiltrated into the pulps followed by carbo-thermal reduction to form SiC nano-rods. We have synthesized SiC from the hybrid of bio-polymer using sol-gel process via carbo-thermal reduction. This talk will focus on the synthesis, properties and applications of silicon carbide nano ceramic materials using different source of polymer/organic waste.

Biography:

Shabana P S Shaikh has completed her PhD from RTM Nagpur University Nagpur, and she has completed her Postdoctoral studies from National University of Malaysia, Malaysia. She has published her work in several high impact international journals. She is currently doing her second Postdoctoral research at SBP Pune University, Pune India With Prof Dr.Kiran Adhi. She is the reviewer for few international good impact journal such as Hydrogen energy and Renewable and Sustainable Energy Reviews. She is a regular member of International Academy of Electrochemical Science.

Abstract:

The present work is focused on the comparative analysis of electrochemical and structural properties of anode materials for solid oxide fuel cells (SOFCs) and the influence of factors affected on electrode performance. The Cu0.5Ce0.5O2-ẟ was prepared by CitrateeNitrate route (CNP) and its formation is confirmed by XRD. The crystallite size of anode materials decreases with change of synthesis route. The highest conductivity is found to be 3.7×102 and 5.2×102 S cm2 at 660 oC before and after reduction for CNP with suitable mechanical strength. The electrochemical performance of anode/electrolyte/anode interface of Cu0.5Ce0.5O2-ẟ is studied after reduction in presence of gas mixture (10%H2 + 90%N2) using electrochemical impedance spectroscopy. The conductivity for the Cell-800 prepared by CNP in presence of gas (10%H2 + 90%N2) shows lowest activation energy 1.28 eV. Thus, CNP is most promising method for obtaining the suitable anode material for the application of SOFC than UreaeNitrate Process (UNP) and GlycineeNitrate Process (GNP).

Biography:

Isiaka Oluwole Oladele obtained his Master’s and PhD in the area of natural-fibre reinforced polymer composites in the Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure, Ondo State, Nigeria. Dr. Oladele has supervised undergraduate and post graduate research and has published in both local and international journals and conference proceedings in this area.

Abstract:

This work was carried out to investigate the reinforcement potential of cow bone particle in epoxy matrix. The cow bone was procured from abattoir as waste and was washed, sundried, calcined, pulverized and sieve to obtain -75 µm that was used for the development of the composites. The composites were developed by varying the reinforcement and the matrix in predetermined proportions using open mould production method. The composites were formed into tensile, flexural and wear samples. The cured samples were tested from where it was discovered that the reinforcement had enhanced the mechanical and wear properties of the material. Scanning Electron Microscope (SEM) was used to examine the dispersion mode of the cow bone particle in the epoxy matrix. From the results, wear and flexural properties of the developed composites were better enhanced than the unreinforced epoxy matrix that was used as the control however; the tensile properties were not properly enhanced relatively. The results revealed that the composites can be used as biomedical implants.

Biography:

Sergei Kulkov has completed his Graduation and Post-graduation in Physics department from Tomsk State University in the year 1975 and 1979 respectively. He has published around 150 articles, has 24 Russian patents and is the author and co-author of 6 books. He is a member of American Ceramic Society. He is a Professor of Material Sciences department and Head of the Department of Theory of Strength and Mechanics of Solids at Tomsk State University and also Head of Ceramics department at the Institute of Strength Physics and Materials Science of the Russian Academy of Sciences.

Abstract:

Materials with negative thermal expansion have received attention of researchers in recent decades. Scientific interest determined the establishment of the causes and explanation of the unique thermal behavior of this group of materials. Materials contracting upon heating can solve the technical problem towards the incompatibility of thermal expansion of the constructional design elements. The combination of materials with positive and negative values of thermal expansion in the required ratio allows obtaining materials with low/zero thermal expansion. The field of application of composite materials is widely included areas such as the production of high-precision optical mirrors, the thermal protection of descent module. Using of additive technology can produce ceramic components of complex shape. Morphology and properties of ZrW2O7(OH)2*2H2O-precursor and ZrW2O8, obtained under the conditions of hydrothermal synthesis were studied. Using the high-temperature X-ray analysis established the mechanism of formation of zirconium tungstate. The influence of temperature on the structure and properties of materials was carried out. The morphology of ZrW2O7(OH)2•2H2O and ZrW2O8 powders was similar and consisted of whisker – like particles, what evidenced by isomorphism of crystals. The effect of temperature on the structure and properties of powders was investigated. The change in the size and shape of samples, wetting angle, the contact angle between the sample and the substrate were determined. It was established that the wetting angle remained almost unchanged up to 900 K. A further increase of the temperature up to 1300±23 K led to the decrease and subsequently the increase the θ values, associated with material spreading on the substrate upon heating. High temperature in situ X-ray studies has shown that zirconium tungstate formed through X-Ray amorphous phase at 625±25 K and remained stable from room temperature to 823 K. Further increase in temperature led to decomposition of zirconium tungstate caused by the change of the lattice structure by restructuring ZrW2O8 atoms to form sublattices of WO3 and ZrO2. It have been shown that during sintering Al – ZrW2O8 mixtures were observed a decomposition of ZrW2O8 and formation of WAl12 и ZrAl3 on first stage and after 5 hours holding zirconium tungstate formed again whisker-like shape.

Biography:

Romain Lucas has completed his PhD from the University of Limoges (France). He is a Lecturer at the Laboratory SPCTS in the group “Ceramics under environmental stresses”, where he takes care of the transversal team “Synthesis and functionalisation”. His current research interests is in the “High Performance Ceramics” team, focused on: the syntheses of original preceramic polymers in the Zr/Si/C system, including a core-shell approach; the role of the interfaces between ceramic and organic materials; and the sintering abilities of these new hybrid materials. He is the author and co-author of 28 publications.

Abstract:

In the race for high-performance materials, the non-oxide ceramics have a special position. Particularly, zirconium carbide (ZrC) and silicon carbide (SiC) are known as high refractory ceramics with interesting thermomechanical properties. In ZrC-SiC composites, the combination of the passivating character of silicon carbide and the high melting temperature, hardness and thermal stability of zirconium carbide, should lead to high-performance ceramics. To fabricate such materials, a polymer-derived ceramic (PDC) route may be a promising way to avoid chemical heterogeneity and obtain high performance composites with a homogeneous microstructure. Here, the idea was to use a chemical process to access ZrC-SiC composites presenting for example an original architecture such as a core-shell form, consisting of a core of ZrC covered with a layer of SiC. To reach this composite, steps of functionalisation and polymer grafting could be performed onto the ZrC surface, to covalently attach macromolecules on the ceramics, and to ideally confine the pyrolysed SiC ceramic onto ZrC. During these syntheses, a control of several physicochemical characterisations will be needed, such as the rheology and the chemical composition of these organic-ceramic systems. In this way, a DFT approach of ZrC surfaces, as well as a Rheo-FTIR study of the original polymeric precursors, will be described. Furthermore, a focus will be systematically established on the thermal behaviour and the microstructural evolution of the material.

Biography:

H Msouni is currently a PhD student in the University of Cadi Ayyad (Morocco). She is working on a project in collaboration with the University of the Littoral Cote d’Opale (France) financed by PHC (Hubert Curien TOUBKAL Program).

Abstract:

The dielectric properties and microstructure of co-doped B-site and A-site BaTiO3 solid solution of the type (Ba,M)(Ti,M’)O3 were investigated. The influence of extremely small amount of Sr, Sn, Zr and Ca dopants on the microstructure and the dielectric characteristics of BaTiO3 were studied systematically. These compositions were designed using the conventional mixed oxide technique and the XRD analysis results indicated that no secondary phase was formed. The microstructure of sintered pellets was studied by SEM at room temperature. The dielectric measurements showed that the BSTZ ceramic present the highest permittivity at 25°C and 100 kHz with the value of 2600, whereas the crystallite size was found to approach 32.3 nm. The BaTiO3 ceramic with Sr at A-site has no phase transition above room temperature, while ceramics with Sn at B-site present ferroelectric – parraelectric transition with sharp transition. Finally, the ceramic with Zr at B-site exhibit normal ferroelectric-parraelectric transition with Tc=97°C. The effect of doping was been studied and analyzed using the AC complex impedance spectroscopy technique to obtain the electrical parameters of polycrystalline samples in a wide frequency range at different temperatures. The piezoelectric properties were also studied.

Biography:

Nathan Newman serves as the Lawrence Professor of Solid State Sciences and is a faculty member in the Materials Program at Arizona State University. Current work involves synthesis, characterization and modeling of novel superconductor junctions and materials, III-N semiconductors, low loss microwave dielectrics and novel photovoltaic material. He has authored or co-authored over 200 technical papers and 12 patents. He received the IEEE Van Duzer award, is a Fellow of the IEEE and the American Physical Society. He serves as an Editor for Materials in the IEEE Trans. of Appl. Superconductivity and has served as Chair of the U.S. Committee on Superconductor Electronics and ASU’s LeRoy Eyring Center for Solid State Sciences.

Abstract:

We have determined the physical nature and concentration of performance-degrading point defects in the dielectrics of superconducting planar microwave resonators using in-situ electron paramagnetic resonance (EPR) spectroscopy. This has been accomplished by measuring parallel plate and stripline resonator quality-factors as a function of the magnitude of a magnetic-field applied parallel to the electrode surfaces. YBa2Cu3O7-δ (YBCO) thin film electrodes proved to be a preferred choice over Nb and MgB2 because they are readily available and have a small surface resistance (Rs) up to high temperatures (~77 K) and magnetic fields (i.e. < 1 Tesla). Measurements of stripline resonators with Mn2+ and Co2+-doped Ba(Zn1/3Ta2/3)O3 and Ba(Zn1/3Nb2/3)O3 dielectrics are found to have losses dominated by spin-excitations (i.e. EPR absorption) in the dielectric, even without an applied magnetic field. Measurements of parallel-plate-resonators using very-pure sputtered Si dielectric layers on an unheated substrate are found to have a ~7 x 1018 cm-3 concentration of paramagnetic defects with properties similar to that reported in amorphous Si. Annealing is found to annihilate the paramagnetic defects to below measureable quantities.

Biography:

G Kavei completed his BSc in Applied Physics from Tabriz University, Tabriz, Iran, MSc degree in Atomic Physics from the Southampton University, UK and PhD in Surface Physics from the Keele University, UK. He is a member of Iranian Crystallography Association (ICA) and Iranian Physics Society (IPS). He has coauthored approximately 11 books, and has published over 85 publications on various aspects of atomic physics, thermoelectric, TiO2 thin film, SPM application, ITO thin film and nano-science and technology. He was also a Lecturer at several universities in Iran teaching different subject in Electron Physics. Currently, he is a Research Professor at the Material and Energy Research Centre (MERC) in Tehran, Iran.

Abstract:

Titanium Dioxide (TiO2) has been considered as an ideal photocatalyst due to its chemical properties. This paper is discusses about how TiO2 nanoparticle in a thin film work as a photocatalyst for self-cleaning purpose and in future we prove how doping increase photocatalytic activation in visible light range. In this work, nanostructured TiO2 thin films were grown by spray pyrolysis technique on glass substrates at 400°C. TiO2 thin films were then annealed at 600-1000°C in the air for a period of 3 hours. The samples were characterized at several views; thickness of the films was measured by Focused Ion Beam (FIB) and field ion beam. The effect of annealing on the structure, morphology and optical properties was studied. The X-ray diffraction (XRD) and Atomic Force Microscopy (AFM) measurements confirmed that the films grown by this technique have good crystalline structure and homogeneous surface. The study also reveals that the RMS value of thin film roughness increased with increasing annealing temperature. The optical properties of the films were studied by UV-Vis spectrophotometer. The optical transmission results showed that the transmission over ~65%, which decrease with the increasing of annealing temperatures.

Biography:

Toshinori Okura completed his Doctorate in Glass Materials Science at the Tokyo Metropolitan University, Tokyo, Japan, in 1990. He is serving as a Professor at the University from 2010. He joined the Massachusetts Institute of Technology, Massachusetts, USA, as a visiting scientist in 1997-1998. He won the scientific prizes from the Japanese Association of Inorganic Phosphate Chemistry in 2008 and the Society of Inorganic Materials, Japan in 2010, respectively, for his great success.

Abstract:

The disposal of radioactive waste generated by the nuclear fuel cycle is among the most pressing and potentially costly environmental problems. The high level nuclear wastes (HLW) are immobilized in a stable solid state and completely isolated from the biosphere. Nuclear waste glasses are typically borosilicate glasses, and these glass compositions can experience phase separation at elevated concentrations of P2O5. For some waste streams, this can require considerable dilution and a substantial increase in the volume of the waste glass produced. Magnesium and Zinc phosphate glasses are classified as ‘anomalous phosphate glasses’, which exhibit anomalies in the relationship between physical properties, such as density and refractive index, and MO/P2O5 (M/P) (M=Mg, Zn) molar ratio around the metaphosphate composition (M/P=1). Most of the phosphate glasses form high polyphosphate consisting of chains of phosphate ions, while the structures of M-P glasses and Z-P glasses are of 2 types, one includes 4 membered rings of PO4 tetrahedra at M/P<1 (type T) and the other contains dimers of PO4 tetrahedra at M/P>1 (type P). In this study, M-P, Z-P, M-Z-P glasses are chosen as the base glass. Simulated HLW was incorporated into the base glass to study its effects on the leaching behavior of M-P, Z-P, M-Z-P glasses for nuclear waste immobilization. The gross leach rates and the leach rates of each constituent element of the sample in water at 90°C were determined from the total weight loss of the specimen and chemical analysis of leachate solution.