Preparation of MoSi2-SiC-Si Coatings for Cf/SiC Composites by in situ Reaction Method

doi:10.3724/SP.J.1077.2009.00978

Abstract

Abstract: A MoSi₂-SiC-Si coating was prepared by in situ reaction method. The phase composition and microstructure of the coating were studied by using XRD,SEM and EDS analysis, and then the anti-oxidation property of the coating was investigated. The results show that the thickness of obtained coating is about 120μm, and the main phases are composed of MoSi₂, SiC and Si. The MoSi₂-SiC-Si coating has excellent anti-oxidation property, which can protect C_f/SiC composites from oxidation at 1500℃ in air for 96h, the weight loss of the coated samples is only 1.8%. The weight loss of the coated C_f/SiC composites samples is primarily due to the reaction of C_f/SiC composites substrate and oxygen diffusing through the penetration cracks in the coating.

Key words: C_f/SiC composites, in situ reaction method, anti-oxidation coating

CLC Number:

TB332

WU Ding-Xing,DONG Shao-Ming,ZHANG Xiang-Yu,DING Yu-Sheng,WANG Zhen,ZHOU Hai-Jun. Preparation of MoSi₂-SiC-Si Coatings for C_f/SiC Composites by in situ Reaction Method[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2009.00978.

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Preparation of MoSi₂-SiC-Si Coatings for C_f/SiC Composites by in situ Reaction Method

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