39. Fabrication of SiC/SiC with Dispersed Carbon Nano-Fibers Composite for Excellent Thermal Properties

  1. Edgar Lara-Curzio
  1. Tomitsugu Taguchi,
  2. Naoki Igawa,
  3. Shiro Jitsukawa,
  4. Shin-Ichi Shamoto and
  5. Yoshinobu Ishii

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291221.ch39

Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2

Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2

How to Cite

Taguchi, T., Igawa, N., Jitsukawa, S., Shamoto, S.-I. and Ishii, Y. (2005) Fabrication of SiC/SiC with Dispersed Carbon Nano-Fibers Composite for Excellent Thermal Properties, in Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2 (ed E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291221.ch39

Author Information

  1. Japan Atomic Energy Research Institute 2-4, shirakata-shirane Tokai, Ibaraki, 319-1195, Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982329

Online ISBN: 9780470291221

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Keywords:

  • ceramic matrix composites;
  • silicon carbide matrix;
  • carbon nano-fibers;
  • chemical vapor deposition;
  • microphotographs

Summary

The SiC/SiC with dispersed carbon nano-fibers (CNFs) composites were fabricated in order to improve the thermal conductivity. The SiC/SiC with and without dispersed CNFs composites were fabricated by reaction bonding (RB) process. The effect of dispersed CNFs on the thermal properties was investigated.

The volume fraction of CNFs was approximately 4%. The CNFs were successfully dispersed in the SiC/SiC composites without reducing the volume fraction of SiC fibers. It is, therefore, considered that the strength of SiC/SiC with dispersed CNFs composites is not reduced. The thermal conductivities of the composites were measured in the temperature range from room temperature to 1000 °C. The thermal conductivities of SiC/SiC with dispersed CNFs composites were twice as high as those without CNFs; the value was approximately 90 W/mK at room temperature. The thermal conductivity of SiC/SiC with dispersed CNFs composites at 800 °C, which is the operation temperature range of fusion reactors, was more than 40 W/mK. The thermal conductivities of SiC/SiC with dispersed CNFs composites in this study satisfy completely the assumed design criterion for fusion reactors, which is 15-20 W/mK at the operation temperature of fusion reactors.