Indexed by:期刊论文

Date of Publication:2019-02-01

Journal:CERAMICS INTERNATIONAL

Included Journals:SCIE、EI、Scopus

Volume:45

Issue:2

Page Number:2044-2052

ISSN No.:0272-8842

Key Words:Ceramic matrix composite; Microstructural tailoring; Oxidation resistance; Fiber treatment; Liquid silicon infiltration

Abstract: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.