W-Mo-Si/SiC Oxidation Protective Coating for Carbon/Carbon Composites

作     者：Dangshe HOU Kezhi LI Hejun LI Qiangang FU Jian WEI Yulei ZHANG 

作者机构：National Key Laboratory of Thermostructure Composite Materials Northwestern Polytechnical University Xi＇an 710072 China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2007年第23卷第4期

页      面：559-562页

核心收录：

学科分类：081702[工学-化学工艺] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：国家重点基础研究发展计划(973计划) 航天科技基金 

主　　题：C/C composites Coating Microstructure Oxidation 

摘      要：A W-Mo-Si/SiC double-layer oxidation protective coating for carbon/carbon （C/C） composites was prepared by a two-step pack cementation technique. XRD （X-ray diffraction） and SEM （scanning electron microscopy）results show that the coating obtained by the first step pack cementation was a thin inner buffer layer of SiC with some cracks and pores, and a new phase of （WxMo1-x）Si2 appeared after the second step pack cementation. Oxidation test shows that, after oxidation in air at 1773 K for 175 h and thermal cycling between 1773 K and room temperature for 18 times, the weight loss of the W-Mo-Si/SiC coated C/C composites was only 2.06%. The oxidation protective failure of the W-Mo-Si/SiC coating was attributed to the formation of some penetrable cracks in the coating.