Fabrication and Mechanical Properties of Reaction-Bonded Carbon Fiber/Si/SiC Composites.

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  • SHIN Dong-Woo
    Div. of Mater. Sci. and Eng., CMCs Lab., AMRI, Kyongsang National University
  • PARK Sam-Shik
    Div. of Mater. Sci. and Eng., CMCs Lab., AMRI, Kyongsang National University
  • TANAKA Hidehiko
    National Institute for Research in Inorganic Materials
  • NIIHARA Koichi
    The Institute of Science and Industrial Research, Osaka University

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  • 反応焼結型炭素繊維/ケイ素/炭化ケイ素複合材料の作製と機械的性質

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Two types of low-density carbon/carbon preforms which had different fiber volume fractions and fiber orientations, i.e., a carbon woven fabric (≈55vol%)/carbon and a chopped carbon fiber (≈40vol%)/carbon composites, were reaction-bonded with a silicon melt at 1750°C in vacuum to fabricate dense carbon fiber/Si/SiC composites. The reaction-bonding process increased the density to -2.1g/cm3 from 1.6 and 1.15g/cm3 for carbon woven and chopped carbon preforms, respectively. All of the composites fractured with extensive fiber pullout. The higher the density, the higher the stiffness and proportional limit stress. The carbon woven fabric/Si/SiC composites with a density of 2.06g/cm3 exhibited a -120MPa ultimate strength and a -80MPa proportional limit in bending test.

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