2D-C/C-SiC复合材料强粒子冲蚀下的失效分析  

Failure Behavior of 2D-C/C-Si C Composites Under High-Energy Particle Erosion

作　　者：王佩瑶[1] 汤素芳[2] 庞生洋[2] 胡成龙[2] 金剑锋[1] 

机构地区：[1]东北大学材料科学与工程学院材料各向异性与织构教育部重点实验室,沈阳110819 [2]中国科学院金属研究所,沈阳110016

出　　处：《现代技术陶瓷》2016年第5期325-331,共7页Advanced Ceramics

基　　金：航天先进制造技术研究联合基金(U1537204);国家自然科学基金(51301035);中央财政基本科研业务费(N151004004);辽宁省高等学校优秀人才支持基金(LJQ2015037)

摘　　要：本文采用化学气相渗透(CVI)工艺制备了2D针刺预制体增强的C/C-SiC复合材料,并对材料密度、力学性能以及强粒子冲蚀下的烧蚀机理和破坏机制进行了分析。结果表明,C/C-SiC复合材料在强粒子冲蚀下的破坏机制主要为机械冲蚀和颗粒侵蚀,其次是冲蚀过程中伴随的少量氧化。材料内层间孔、束间孔以及针刺孔的存在加剧了C/C-SiC复合材料破坏。研究发现,通过改变预制体结构来实现材料力学性能的均衡。A 2D-C/C-SiC composite enhanced by needle-punching preform was densified by chemical vapor infiltration （CVI） technique, and its density, mechanical properties and the ablation and failure mechanisms under a high-energy particle erosion test were investigated in this work. The results show that the failure behavior of the composite under high-energy particle erosion were mainly controlled by the mechanical scour and the impacted particles eroding, and also controlled by the slight oxidation of the composite. The inter-layer, inter-bundle and needling pores in the C/C-SiC composite will aggravate the failure of the composite. It suggested that homogenizing the mechanical properties in different areas of the composite by changing the preform structure and reducing the porosity by increasing the material density would be two key design principles for the C/C-SiC composite operating in the high-energy particle erosion condition.

关 键 词：C/C-SIC复合材料 烧蚀 氧化 

分 类 号：TB332[一般工业技术—材料科学与工程]