C/C-Al_2O_3梯度功能复合材料改性研究  

Study on modified C/C-Al_2O_3 functionally graded composite

作　　者：曾晓梅[1] 李铁虎[1] 刘红林[2] 马拯 

机构地区：[1]西北工业大学材料工程学院,西安710072 [2]中国航天科技集团公司四院四十三所,西安710025 [3]中国海军驻四院军代室,西安710025

出　　处：《固体火箭技术》2004年第4期304-307,共4页Journal of Solid Rocket Technology

摘　　要：采用炭纤维表面涂层与基体改性方法相结合,对所制的C/C Al2O3梯度功能复合材料界面性能进行了改进。研究了增强相炭纤维与陶瓷相Al2O3的界面结合强度这一关键技术,进行了热学、烧蚀、力学性能测试和微观结构分析。结果表明,添加ZrO2对基体进行改性,使材料的强度提高了39.1%,热导率降低至0.902W/(m·K)(800℃);采用炭纤维表面SiC涂层处理能有效改善复合材料的界面性能,使材料强度提高了3倍,达到约70MPa。The interfacial properties of C/C-Al2O3 functionally graded composite were modified by combining carbon fiber surface coating with matrix modification. The interfacial bond strength between reinforcement phase carbon fiber and ceramic phase Al2O3 was studied, the thermal performance, ablative behavior and mechanical properties were tested, and microstructure was analyzed. The results show that the matrix can be modified by adding ZrO2. The compressive strength of C/C/Al2O3 composite increase by 39.1% and the 0thermal conductivity coefficient of C/C/Al2O3 composite decreases to 0.902 W/(m&middotK). And also the interfacial properties can be improved by coating carbon fiber with SiC. The strength of the composite with SiC coating reaches about 70 MPa, 3 times larger than that of composite without SiC coating.

关 键 词：基体改性 Al2O3 梯度功能复合材料 炭纤维 SIC涂层 界面性能 ZrO2 C/C 增强相 界面结合强度 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程] TB332[一般工业技术—材料科学与工程]