32. New Type of SIC-Sintered Fiber and its Composite Material

  1. Don Bray
  1. Toshihiro Ishikawa,
  2. Shinji Kajii,
  3. Terumi Hisayuki and
  4. Yasuhiko Kohtoku

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294482.ch32

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3

How to Cite

Ishikawa, T., Kajii, S., Hisayuki, T. and Kohtoku, Y. (1988) New Type of SIC-Sintered Fiber and its Composite Material, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294482.ch32

Author Information

  1. Ube Research Laboratories, Ube Industries Ltd., Ube City, Yamaguchi, 755 Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780470375587

Online ISBN: 9780470294482

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Keywords:

  • composite;
  • amorphous;
  • atmosphere;
  • combustion;
  • phenomenon

Summary

This paper deals with a new type of sintered SiC fiber with excellent heatresistance and mechanical properties, and a unique composite material composed of only the sintered SiC fiber. We report here that the sintered SiC fiber containing a very small amount of Al showed high-strength, high-modulus, excellent high temperature stability and prominent alkali-resistance. Moreover, the fiber showed excellent creep resistance at very high temperatures compared with well-known SiC-based fibers. This sintered SiC fiber was synthesized at a very high temperature (over 2073K) using an amorphous Si-Al-C-O fiber as the starting material. Its high strength over 2 GPa was maintained up to 2273K in Ar atmosphere and very little weight loss (only 1.8wt%) was observed up to 2473K. On the basis of this technology, we have also succeeded in developing a toughened fiber-bonded composite, consisting of perfectly close-packed sintered SiC fibers with a hexagonal transformed cross-section. At the interface between the hexagonal-columnar fibers a very thin interfacial carbon layer uniformly exists to obtain fibrous fracture pattern. The sintered fiber-bonded composite, having very high fiber volume fraction (∼100%), showed excellent oxidation resistance up to 1873K in air and perfectly maintained the initial high strength even at that high temperatures.