Chapter 19. Improvement of Si-Ti(Zir)-C-O Fiber and a Precursor Polymer for High Temperature CMC

  1. John B. Wachtman Jr.
  1. T. Yamamura1,
  2. S. Masakl1,
  3. T. Ishlkawa1,
  4. M. Sato2,
  5. M. Shibuya2 and
  6. K. Kumagawa2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314876.ch19

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 17, Issue 4

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 17, Issue 4

How to Cite

Yamamura, T., Masakl, S., Ishlkawa, T., Sato, M., Shibuya, M. and Kumagawa, K. (2008) Improvement of Si-Ti(Zir)-C-O Fiber and a Precursor Polymer for High Temperature CMC, in Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 17, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314876.ch19

Author Information

  1. 1

    Research Institute of Advanced Material Gas-Generator, Bunkyo-ku, Tokyo 112

  2. 2

    Ube Research Laboratory, Ube Industries Ltd., Ube City 755, Japan

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1996

ISBN Information

Print ISBN: 9780470375433

Online ISBN: 9780470314876

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Keywords:

  • special gradient structure;
  • fiber-bonded ceramics;
  • heat-resistance;
  • surface treatment;
  • continuous inorganic fibers

Summary

Sl-Ti-C-O fibers with 13 and 5-6 wt % oxygen content, which had double layer-gradient structures and a special gradient structure near the surface, respectively, TM-S6 and TE-S6, were developed for CMCs' application. SIC/SITIC or SiTiC matrix comosites using 3-D fabrics of TM-S6 or TE-S6 with no surface treatment were fabricated by the CVI and/or PIP (polymer impregnation and pyrolysis) methods. The obtained CMCs had higher mechanical properties and more excellent heat-resistance in air above 1473 Kthan ordinary Si-Ti-C-O fibers. Fiber-bonded ceramics (Tyrannohex, Vf:9096) obtained by hot-pressing UD sheets or 2-D fabrics of Si-Ti-C-O fibers with 13 wt % of the oxygen content, furthermore, kept their strength up to 1773 K in air and showed good creep characteristics at 1673 K in air. Si-Ti-C-O fibers with near-stoichiometric C/Si ratio and Si-Zr-C-O fiber with 3 wt % oxygen content were also synthesized by changing the pyrolysis process and the structure of the precursor polymer in order to still further improve oxidative heat-resistance and creep characteristics.