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

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...

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Bibliographic Details
Published inJournal of materials science & technology Vol. 33; no. 11; pp. 1378 - 1385
Main Authors Zhao, Chuanbao, Wang, Yumin, Zhang, Guoxing, Yang, Qing, Zhang, Xu, Yang, Liʹna, Yang, Rui
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.2017
Subjects
Heat treatment
Reaction layer
Silicon carbide fiber
Strength degradation
Silicon carbide fiber
Heat treatment
Reaction layer
Strength degradation
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Summary: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.
Bibliography:21-1315/TG
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.
Silicon carbide fiber Heat treatment Reaction layer Strength degradation
ISSN:1005-0302
1941-1162
DOI:10.1016/j.jmst.2017.02.009