Cr-Si复合涂层C/SiC复合材料的显微结构与性能  

Oxidation Resistance of 3D C/SiC Composites Protected with Cr-Si Alloy Coating

作　　者：殷小玮[1] 成来飞[1] 张立同[1] 徐永东[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《材料工程》2001年第9期25-27,30,共4页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目 ( 5 9972 0 2 9)

摘　　要：对 Si C/ Cr- Si复合涂层 C/ Si C复合材料的结构和抗氧化性能进行了研究 ,并与 Si C涂层 C/ Si C复合材料的结构和性能进行了对比。前者在 10 0 0～ 15 0 0℃内表现出较好的抗氧化性能 ,这是由于 Si C涂层表面的缺陷被 Cr- Si涂层填充。由于涂层之间的热膨胀系数相差较大 ,复合涂层 C/ Si C复合材料在 5 0 0～ 70The microstructure and oxidation resistance of 3D C/SiC composites protected with SiC/Cr Si coating were investigated in dry air from 400 to 1500℃ for 10 hours, which was compared with SiC coated C/SiC composites The former showed better oxidation resistance than the latter during 1000～1500℃, which resulted from the filling of the defects in SiC coating by Cr Si coating However, C/SiC composite with SiC/Cr Si coating showed worse oxidation resistance during 500～700℃, which resulted from the bigger CTE mismatch between the coating and matrix

关 键 词：C/SIC 氧化 燃气 碳化硅 碳纤维增韧 铬硅复合涂层 航空发动机 复合材料 显微结构 性能 抗氧化性能 

分 类 号：V258.5[一般工业技术—材料科学与工程] TB332[航空宇航科学与技术—航空宇航制造工程]