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Chaoying Ni

Chaoying Ni

University of Delaware, USA

Title: Structural and thermal properties of reaction bonded SiC/Si composite

Biography

Biography: Chaoying Ni

Abstract

The thermal conductivity (κ) of a reaction bonded SiC/Si composite as a function of SiC percentage and temperature was characterized. The κ value strongly associates with the SiC percentage and the inclusion of Si in SiC significantly decreases the κ value. The interfaces of both SiC/Si and SiC/SiC have significant contribution to the thermal resistivity. HRTEM confirms the existence of stacking faults and dislocations within the SiC phases near the interfacial region. In addition, an amorphous thin layer exists at the large angle grain boundary where significant lattice mismatch exists between SiC and Si during the crystal growth at the fabrication temperature. At a measurement temperature of about 1100°C, the κ value levels off and deviates from a general downward trend, suggesting a mechanism of structural evolution in the composite. The in-situ TEM heating test confirms the phase transformation of a-Si to crystalline Si at elevated temperatures

Recent Publications :

  1. Li X, Yan X, Zuo S, Lu X, Luo S, Z Li, Yao C, Ni C (2017) Construction of LaFe1−xMnxO3/attapulgite nanocomposite for photo-SCR of NOx at low temperature. Chemical Engineering Journal 320: 211-221.
  2. Yang Y, Yang H, Liu L, Li T, Yuan H, Ni C (2017) Effects of fluoride ion on the formation of earthworm-like mesoporous silica. Journal of the American Ceramic Society DOI: 10.1111/jace.14696.
  3. Zuo S, Chen Y, Liu W, Yao C, Li X, Li Z, Ni C, Liu X (2017) A facile and novel construction of attapulgite/Cu2O/Cu/g-C3N4 with enhanced photocatalytic activity for antibiotic degradation. Ceramics International 43 (3): 3324-3329.
  4. Chen J, Cai X, Yang D, Song D, Wang J, Jiang J, Ma A, Lv S, Hu MZ, Ni C (2017) Recent progress in stabilizing hybrid perovskites for solar cell applications. Journal of Power Sources 355: 98-133.
  5. Li X, Li F, Lu X, Zuo S, Yao C, Ni C (2017) Development of Bi2W1−xMoxO6/montmorillonite nanocomposite as efficient catalyst for photocatalytic desulfurization. Journal of Alloys and Compounds 709: 285-292.