采用等温等压化学气相浸渗法(ICVI),对原始的SiC纤维束和沉积有pyC层的SiC纤维束浸渗SiC基体,制备了纤维束复合材料SiC/SiC( Mini SiC/SiC).分析了SiC纤维束和Mini SiC/SiC复合材料的拉伸性能,同时利用两参数Weibull分布研究了强度分布.结果表明,pyC层具有修复纤维表面缺陷的作用,SiC纤维束沉积pyC层后,纤维表面光滑而致密,表面缺陷减少,其拉伸强度、延伸率和Weibull模数分别比原始SiC纤维束提高了25％、12％和288％；且由其增强复合材料的拉伸强度、延伸率和Weibull模数分别比由原始SiC纤维束增强复合材料提高了103％、83％和340％.pyC界面层对SiC纤维表面缺陷的修复作用和对SiC纤维的保护作用以及降低复合材料裂纹敏感性的作用提高了Mini SiC/SiC复合材料的拉伸性能和Weibull模数.
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