三维C_f/SiC复合材料在固体火箭燃气流冲击条件下的形貌分析  

Morphology of 3D-C_f/SiC composite exposed to rocket motor plumes

作　　者：林红吉[1] 孟宪林[1] 张海永[1] 

机构地区：[1]海军装备技术研究所,北京102442

出　　处：《兵器材料科学与工程》2007年第3期37-39,共3页Ordnance Material Science and Engineering

摘　　要：采用高铝粉含量的固体火箭发动机燃气流对三维C_f/SiC复合材料进行高温气流冲刷试验,分析材料的形貌变化。SEM观测结果表明,三维C_f/SiC材料在固体火箭喷射的高温气/固两相流冲刷下,表面出现明显的冲刷痕迹(大量的5μm左右的冲刷坑),并且在材料表面附着了一层约20μm厚的致密白色物质,SEM及XRD测试分析结果表明,白色物质是立方晶系Al_2O_3,是由推进剂中铝粉燃烧所形成的高温Al_2O_3粒子熔融镶嵌而成。In this paper, erosion resistance of 3D-C/SiC composite materials exposed to highly aluminized rocket motor plumes was examined, surface morphology after motor firing test was investigated. SEM results show that there were a plenty of erosion zones on the 3D-C/SiC composite materials surface, and some white deposition materials were also observed on the surface of C/SiC composite materials. XRD and SEM results show that white deposition materials are cubic Al2O3, which is the bums of Al powders in rocket propeller.

关 键 词：三维Cf/SiC 固体火箭燃气流 气/固两相流 冲刷 

分 类 号：V435.14[航空宇航科学与技术—航空宇航推进理论与工程]