Yu Chen
Sichuan University, China
Title: Nano-SiCn-MoSi2/SiC oxidation protective and thermal shock resistant coating for carbon/carbon composites
Biography
Biography: Yu Chen
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.