C/SiC复合材料在典型模拟环境下高温拉伸性能研究  

Study on High Temperature Tensile Properties of C/SiC Composites Under Typical Simulated Environments

作　　者：唐君 袁泽帅 黄汝超 袁建宇[1] 徐林[1] 李军平[1] 卢鹉[1] TANG Jun;YUAN Zeshuai;HUANG Ruchao;YUAN Jianyu;XU Lin;LI Junping;LU Wu(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076)

机构地区：[1]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2023年第2期85-89,共5页Aerospace Materials & Technology

摘　　要：以先驱体浸渍裂解(PIP)工艺制备的C/SiC复合材料为对象,研究了C/SiC复合材料在典型模拟环境下的高温拉伸性能,首次获得了约3 000 s时间不同变状态条件下材料的高温拉伸性能数据,探讨了不同条件下C/SiC复合材料高温承载行为及其变化规律。研究结果表明,C/SiC复合材料经历约3 000 s复杂阶梯热环境后拉伸强度仍保持60%左右;经历大温度梯度热震后,C/SiC复合材料的高温拉伸性能保持率反而提高,最高保持率超过80%;热震温差越大,热震后保温时间越长,对材料的高温拉伸性能保持和提高越有利。The high temperature tensile properties under the typical simulated environment of C/SiC composites prepared via polymer infiltration and pyrolysis(PIP)method were investigated.The high temperature tensile property data of the C/SiC composites under different variable conditions(about 3000 s)were obtained.The high temperature bearing behavior and its variation law of the C/SiC composites under different variable conditions were discussed.The results show that the tensile strength of C/SiC composite material can still maintain about 60%after about 3000 s complex step heating.The high temperature tensile property retention of C/SiC composite material increases after thermal shocks with large temperature difference.The highest temperature tensile property retention exceeds 80%.The larger thermal shock temperature variation and longer holding time after thermal shock,which is more beneficial to maintian and improve the high temperature tensile properties of C/SiC composites.

关 键 词：C/SIC复合材料 热震 界面强度 高温拉伸性能 

分 类 号：TB33[一般工业技术—材料科学与工程]