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Property Evaluation of Reaction Sintered SiC/SiC Composites Fabricated by Melt Infiltration Process

용융함침법에 의한 반응소결 SiC/SiC 복합재료의 특성 평가

  • 이상필 (동의대학교 기계공학과) ;
  • 신윤석 (동의대학교 기계공학과 대학원) ;
  • Published : 2007.02.01

Abstract

SiC/SiC composites and monolithic SiC materials have been fabricated by the melt infiltration process, through the creation of crystallized SiC phase by the chemical reaction of C and Si. The reinforcing material used in this system was a braided Hi-Nicalon SiC fiber with double interphases of BN and SiC. The microstructures and the mechanical properties of RS-SiC based materials were investigated through means of SEM, TEM, EDS and three point bending test. The matrix morphology of RS-SiS/SiC composites was greatly composed of the SiC phases that the chemical composition of Si and C is different. The TEM analysis showed that the crystallized SiC phases were finely distributed in the matrix region of RS-SiC/SiC composites. RS-SiC/SiC composites also represented a good flexural strength and a high density, accompanying a pseudo failure behavior.

Keywords

Flexural Strength;Microstructure;Melt Infiltration;Reaction Sintering;SiC/SiC Composites

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