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论文类型：期刊论文

发表时间：2019-02-01

发表刊物：CERAMICS INTERNATIONAL

收录刊物：SCIE、EI、Scopus

卷号：45

期号：2

页面范围：2044-2052

ISSN号：0272-8842

关键字：Ceramic matrix composite; Microstructural tailoring; Oxidation resistance; Fiber treatment; Liquid silicon infiltration

摘要：In order to satisfy the requirements of structural and functional applications, tailoring microstructures and improving oxidation resistance of C/C-SiC is essential. In this study, microstructure tailoring is achieved by pretreatment of fiber at 1500 degrees C in a nitrogen atmosphere. It is found that the pre-treatment of carbon fibers increases the mass fraction of the SiC matrix in composites, the distribution of the SiC matrix becomes homogenous, and the fine-grained SiC layer enwraps the fibers forming the dense shell. Thermo-gravimetric measurements indicate that microstructural tailoring by fiber treatment can significantly improve the oxidation resistance of C/C-SiC composites, attributed to the high mass fraction and the homogenous distribution of the SiC matrix.