Research Paper

Microstructure and Properties of TiSi2-based Composites
in situ Prepared by SPS

  • QIN Chao ,
  • WU Ting ,
  • WANG Lian-Jun ,
  • JIANG Wan ,
  • CHEN Li-Dong
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  • Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received date: 2007-04-03

  Revised date: 2007-05-25

  Online published: 2008-03-20

Abstract

TiSi2-SiC and TiSi2-SiC-Ti3SiC2 composites were in situ fabricated by spark plasma sintering using commercially available Si, Ti, C and TiC as starting materials. The phase constitutes and microstructures of the composites were analyzed by XRD, FESEM and TEM. It shows that the TiSi2 grains are larger than 1μm and SiC particles in the range of 200--300nm uniformly distribute
in the TiSi2 matrix. The hardness, fracture toughness and bending strength of TiSi2-SiC composites increase with the SiC contents increasing. The introduction of Ti3SiC2 enhances the mechanical properties of
TiSi2-SiC-Ti3SiC2 composite greatly. In addition, the introduction
of SiC and Ti3SiC2 have little effect on the electrical conductivity and thermal conductivity of TiSi2 -SiC composites tested at the elevated temperature.

Cite this article

QIN Chao , WU Ting , WANG Lian-Jun , JIANG Wan , CHEN Li-Dong . Microstructure and Properties of TiSi2-based Composites
in situ Prepared by SPS[J]. Journal of Inorganic Materials, 2008
, 23(2) : 209 -212 . DOI: 10.3724/SP.J.1077.2008.00209

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