Effect of CVD SiC Coatings on Oxidation Behaviors of Three Dimensional C/SiC Composites

Abstract

Abstract: Two kinds of multilayer CVD SiC coatings were prepared by LPCVD on a three dimensional C/SiC composites. The surface and cross section micromorphologies of the coatings were analyzed by SEM.
The oxidation behaviors of the composites with multilayer coatings at 1300℃ in air were studied. The interlayer gaps of the multilayers can be effectively controlled by the slow deposition. The multilayer
coatings prepared by the slow deposition were integrated as a whole which can improve the oxidation protection property evidently. The weight loss of the 3D C/SiC protected with the multilayer CVD SiC
coatings prepared by slow deposition after oxidation for 30h at 1300℃ in air can be controlled below 1%.

Key words: C/SiC composite, coating, oxidation, defects

CLC Number:

TG174

WU Shou-Jun,CHENG Lai-Fei,ZHANG Li-Tong,XU Yong-Dong,CHEN Zhao-Feng. Effect of CVD SiC Coatings on Oxidation Behaviors of Three Dimensional C/SiC Composites[J]. Journal of Inorganic Materials.

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Effect of CVD SiC Coatings on Oxidation Behaviors of Three Dimensional C/SiC Composites

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