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Journal of Inorganic Materials

Journal of Inorganic Materials >

2007 , Vol. 22 >Issue 6: 1142 - 1146

DOI: https://doi.org/10.3724/SP.J.1077.2007.01142

Research Paper

Effect of Interphase on Mechanical Properties of Infiltration Cf/SiC Composites Fabricated by Vapor Silicon

  • ZHOU Qing ,
  • DONG Shao-Ming ,
  • DING Yu-Sheng ,
  • ZHANG Xiang-Yu ,
  • WANG Zhen ,
  • HUANG Zheng-Ren ,
  • JIANG Dong-Liang
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  • 1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Received date: 2006-12-04

  Revised date: 2007-01-08

  Online published: 2007-11-20

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Abstract

3D carbon fiber reinforced silicon carbide matrix composites (Cf/SiC) were fabricated by vapor silicon infiltration (VSI) at 1650℃. Densities of the composites with or without C/SiC interphase are about 1.85g/cm3. The characterization of the Cf/SiC composites was investigated. When C/SiC interphases exist, the carbon fibers are protected from the reaction with silicon gas and the fibers remain intact. The fiber-matrix bonding is weakened and the distinct fiber pull-outs occur in Cf/SiC composites with interphases. The composite shows non-brittle fracture behaviour and its flexure strength reaches around 239.5MPa. However, the Cf/SiC composite without interphase has very poor mechanical performance. Its flexure strength is only 67.4MPa. Results indicate that the carbon fibers are siliconized during vapor silicon infiltration without interphase. When the vapor infiltration temperature increases to 1700℃, density of Cf/SiC composites with interphase increases to 2.25g/cm3. Strength of this composite is nearly the same as that fabricated at 1650℃

Key words： Cf/SiC; vapor silicon infiltration; interphase

Cite this article

ZHOU Qing , DONG Shao-Ming , DING Yu-Sheng , ZHANG Xiang-Yu , WANG Zhen , HUANG Zheng-Ren , JIANG Dong-Liang . Effect of Interphase on Mechanical Properties of Infiltration Cf/SiC Composites Fabricated by Vapor Silicon[J]. Journal of Inorganic Materials, 2007 , 22(6) : 1142 -1146 . DOI: 10.3724/SP.J.1077.2007.01142

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