炭/炭复合材料在1680℃的抗氧化  

On oxidation protection of C/C composites at 1 680 ℃

作　　者：侯党社[1,2] 李克智[2] 李贺军[2] 杜红英 

机构地区：[1]咸阳职业技术学院,陕西咸阳712000 [2]西北工业大学超高温结构复合材料国防科技重点实验室,陕西西安710072 [3]晋西机器工业集团有限责任公司产品设计研究所,山西太原030027

出　　处：《宝鸡文理学院学报（自然科学版）》2009年第2期32-34,共3页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

基　　金：国家"973"资助项目(2006CB600908)

摘　　要：目的研究C/C复合材料在1 680℃高温条件下的抗氧化性能。方法采用原位生成法在C/C复合材料表面制备SiC-WSi2/MoSi2抗氧化复合涂层,研究该涂层在1 680℃高温下的抗氧化性能。结果该复合涂层在氧化初期对C/C复合材料有优异的抗氧化保护作用,氧化12 h带有该涂层的C/C试样仍然增重(0.49%),但氧化至36 h时,涂层试样失重达14.5%。结论涂层的失效是因为SiO2玻璃保护膜在1 680℃下不能长时间完整存在,促使涂层中穿透性裂纹的形成,导致氧直接向基体扩散所致。Aim To study anti-oxidation property of carbon/carbon （C/C） composites at 1 680 ℃. Methods With In-situ generation method, A SiC-WSi2/MoSi2 multilayer oxidation protective coating on C/C composites was prepared, the property of which was studied at 1 680℃. Results The multi-coating exhibited excellent oxidation protective ability at the initial stage of oxidation; the weight gain of the coated specimen increased by 0.49}6 after oxidation for 12 h, while the weight loss of it was up to 14. 5% after 36 h. Conclusion The reason for invalidation of the multi-coating is that the integrity of protective film SiO2 at 1 680℃ could not maintain a long time, resulting in the formation of penetrable cracks in the coating, and oxygen diffuse directly to C/C matrix.

关 键 词：C/C复合材料 涂层 抗氧化性 

分 类 号：TB332[一般工业技术—材料科学与工程]