Chapter 32. Thermal Conductiviy of CVI and PIP SiC/SiC Composites

  1. Ersan Ustundag and
  2. Gary Fischman
  1. R. Yamada,
  2. T. Taguchi,
  3. J. Nakano and
  4. N. Igawa

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294567.ch32

23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures : A: Ceramic Engineering and Science Proceedings, Volume 20, Issue 3

23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures : A: Ceramic Engineering and Science Proceedings, Volume 20, Issue 3

How to Cite

Yamada, R., Taguchi, T., Nakano, J. and Igawa, N. (1999) Thermal Conductiviy of CVI and PIP SiC/SiC Composites, in 23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures : A: Ceramic Engineering and Science Proceedings, Volume 20, Issue 3 (eds E. Ustundag and G. Fischman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294567.ch32

Author Information

  1. Japan Atomic Energy Research Institute, CREST, Tokai-mura, Naka-gun, Ibaraki-ken, 319–1195, Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1999

ISBN Information

Print ISBN: 9780470375631

Online ISBN: 9780470294567

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Keywords:

  • conductivity;
  • phonon scattering;
  • crystallite;
  • thermal diffusivity;
  • degradation

Summary

Thermal diffusivity and conductivity of CVI composites increased with increasing sample density, and showed normal temperature dependence in which these values decreased with increasing temperature due to phonon scattering except for a sample with lower density. For PIP composites, however, the temperature dependence as well as the value itself was quite small for the first diffusivity measurement. From the second consecutive measurement the temperature dependence became normal and the value of diffusivity increased because of annealing effect by heating a PIP specimen up to 1400°C. The results of X-ray diffraction show the increase in SiC crystallite size that occurred during the high temperature measurements, which increased the thermal diffusivity and conductivity and led to the temperature dependence normal.