Effect of heat treatment on the microstructure and properties of CVD SiC fiber

作     者：Chuanbao Zhao Yumin Wang Guoxing Zhang Qing Yang Xu Zhang Li'na Yang Rui Yang 

作者机构：Institute of Metal Research Chinese Academy of Sciences Beijing Branch Huawei Technologies Co. Ltd. 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2017年第33卷第11期

页      面：1378-1385页

核心收录：

学科分类：0806[工学-冶金工程] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the Raman Spectroscopy Laboratory of Institute of Metal Research  Chinese Academy of Sciences for the support in the accomplishment of this paper 

主　　题：Silicon carbide fiber Heat treatment Reaction layer Strength degradation 

摘      要：In this study, the effect of heat treatment on the room temperature strength of W-core Si C fiber produced by chemical vapor deposition（CVD） was investigated. Thermal exposure in the temperature range of 900–1000？C decreases the strength of the Si C fiber. Fracture morphology analysis indicates that failure initiations predominantly take place at the W-core/Si C interface. A reaction layer that formed at the W-core/Si C interface during thermal exposure degraded the fiber strength and an empirical linear relationship of strength vs thickness of the reaction layer can be obtained. The kinetics of the growth of the W-core/Si C reaction layer were determined.