Journal of Inorganic Materials

• Research Paper • Previous Articles     Next Articles

Microstructure of C/SiC Braking Material

XU Fang1,2, ZHANG Li-Tong1, MENG Xiang-Kang2, CHEN Yan-Feng2,
XU Yong-Dong1, FAN Shang-Wu1, ZHANG Yi2   

  1. 1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China; 2. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • Received:2007-04-26 Revised:2007-06-14 Published:2008-03-20 Online:2008-03-20

Abstract: Carbon fiber reinforced silicon carbide matrix (C/SiC) braking materials were prepared by a reactive melt infiltration method. The microstructure characteristics of SiC were studied by means of optical microscope, scanning electron microscope and transmission electron microscope in combination with component analysis by X-ray diffraction. Results show that β-SiC zone usually forms inside the short-cut fabric, around the needling fibers, and among the fiber bundles in the non-woven web. Residual Si locates among SiC grains. In C/SiC composites, there exist two different areas of SiC, one is coarser β-SiC grains between 5--15μm at the SiC-Si interface. and the other is a zone of a fine grained β-SiC layer with dimension of about 100nm at the SiC-C interface.

Key words: carbon/silicon carbide, braking material, microstructure

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