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Strength retention in scheelite coated SiC fibers: Effect of the gas composition and pre-heat treatment

Authors :
Xiaofeng Zhao
Xiaohui Fan
Fangwei Guo
Binbin Wu
Na Ni
Ping Xiao
Source :
Journal of the European Ceramic Society. 40:2801-2810
Publication Year :
2020
Publisher :
Elsevier BV, 2020.

Abstract

Scheelite coating was deposited on SiC fiber tows from various liquid-phase precursors at 1100℃. Strength degradation of SiC fiber was found after fiber coating which was found to be caused by the stress corrosion as a result of gases generated from the decomposition of by-products remaining in the coating. A new and simple method of low temperature pre-heat treatment was adopted to eliminate the stress corrosion in the fiber coating process and to isolate the effect of different types of gases on the stress corrosion cracking of fibers. The tensile strength and fractography of samples with and without pre-heat treatment were compared. Furthermore, the effect of gas composition on the strength degradation of SiC fiber was also investigated through the control experiments.

Details

ISSN :
09552219
Volume :
40
Database :
OpenAIRE
Journal :
Journal of the European Ceramic Society
Accession number :
edsair.doi...........f457c29c5a6e35d235bfe94aab3dd7d7
Full Text :
https://doi.org/10.1016/j.jeurceramsoc.2020.02.031