碳纤维增强超高温陶瓷基复合材料的性能与微结构  

Properties and Microstructures of Carbon Fiber Reinforced Ultra-High Temperature Ceramic Matrix Composites

作　　者：孙银洁[1] 李秀涛[1] 宋扬[1] 石晓斌[1] 许春来[1] 

机构地区：[1]航天材料及工艺研究所先进功能复合材料技术重点实验室,北京100076

出　　处：《宇航材料工艺》2011年第6期81-84,共4页Aerospace Materials & Technology

摘　　要：利用前驱体浸渍、裂解方法制备了两种超高温陶瓷基复合材料,并对材料的力学性能进行了评价。采用SEM、EDS表征手段分析了材料复合过程中的微观结构特征,获得了工艺过程中碳纤维、基体、界面特征及其变化规律。结果表明,材料致密化周期减少,热处理时间缩短,对纤维的损伤减轻,能充分提高碳纤维的强度利用率,从而提高材料的力学性能。Carbon fiber reinforced ultra high temperature ceramic composites were prepared by precur- sor infiltration pyrolysis. The characteristics of carbon fiber, matrix and fiber--matrix interface of the com- posites were obtained by microstructures analysis. The correlations of processing-microstructure-mechanical properties were illustrated by the analysis of the precursor properties, the preparation, mechanical properties and microstructure. Results show that less dipping cycles and pyrolysis time can reduce the damage of the carbon fibers and then improve the mechnical properties of the ultra-high temperature ceramic composites.

关 键 词：超高温陶瓷复合材料 碳纤维 前驱体 微观结构 性能 

分 类 号：TQ174.758[化学工程—陶瓷工业]