Chapter 42. Microstructure and Properties of Liquid Phase Sintered SiC/SiC Composites

  1. Hua-Tay Lin and
  2. Mrityunjay Singh
  1. Y. Katoh1,
  2. A. Kohyama1,
  3. J -J. Kai2,
  4. S. Dong3 and
  5. T. Hinoki3

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294741.ch42

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

How to Cite

Katoh, Y., Kohyama, A., Kai, J. .-J., Dong, S. and Hinoki, T. (2008) Microstructure and Properties of Liquid Phase Sintered SiC/SiC Composites, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294741.ch42

Author Information

  1. 1

    Institute of Advanced Energy Kyoto University Gokasho, Uji, Kyoto 611–0011, Japan

  2. 2

    National Tsing Hua University Hsinchu, Taiwan 300, Republic of China

  3. 3

    CREST Japan Science and Technology Corporation Kawaguchi, Saitama 332–0012, Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375785

Online ISBN: 9780470294741

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Keywords:

  • SiC;
  • tailorability;
  • combustion;
  • hermeticity;
  • SiC-matrix

Summary

SiC/SiC composites with attractive thermo-mechanical properties and gas tightness have been developed through a combination of transient liquid-phase sintering of nano-phase SiC powders mixed with oxide additives and advanced near-stoichiometric SiC fibers with an appropriate coating. The mechanical properties generally unproved with the increased sintering temperature and pressure in the range employed in the present experiment. The mechanical property improvement was attributed to the reduced intra-fiber bundle matrix porosity and the promoted matrix sintering. The matrix consisted mostly of even-sized SiC crystal grains both in fiber-bundle and fiber-free regions. Thermal conductivity is likely be determined by the grain boundary scattering. The thermo-mechanical properties of the composites will be tailorable by controlling the matrix microstructure through varying the sintering temperature and time. The tailorability will probably be limited by interfacial structure integrity and the fibers' heat resistance.