Three Dimensional Textile SiC/SiC Composites by Chemical Vapor Infiltration

Abstract

Abstract: Three dimensional textile SiC/SiC composites were fabricated by chemical vapor infiltration, and
their mechanical properties and microstructure were investigated. The density of the composites was 2.5g·cm^-3 after the
preform was infiltrated for 30 hours. The present composite materials exhibited excellent mechanical properties and metal-like failure behavior.
The flexural strength and displacement were 860MPa and 1.2mm, respectively. Fracture toughness and work of fracture were 41.5MPa·m^1/2 and
28.1kJ·m^-2, respectively. The dynamic toughness was determined by using Charpy impact method and its value was 36.0kJ·m^-2.

Key words: chemical vapor infiltration, 3D SiC/SiC composites, mechanical properties, microstructure

CLC Number:

TQ342

XU Yong-Dong,CHENG Lai-Fei,ZHANG Li-Tong. Three Dimensional Textile SiC/SiC Composites by Chemical Vapor Infiltration[J]. Journal of Inorganic Materials.

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Three Dimensional Textile SiC/SiC Composites by Chemical Vapor Infiltration

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