Chapter 28. Polymeric Routes to Silicon Carbide and Silicon Oxycarbide CMC

  1. John B. Wachtman Jr
  1. Frances I. Hurwitz1,
  2. Paula J. Heimann2,
  3. John Z. Gyekenyesi2,
  4. John Masnovi2 and
  5. Xin Ya Bu2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470313831.ch28

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

How to Cite

Hurwitz, F. I., Heimann, P. J., Gyekenyesi, J. Z., Masnovi, J. and Bu, X. Y. (1991) Polymeric Routes to Silicon Carbide and Silicon Oxycarbide CMC, in Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313831.ch28

Author Information

  1. 1

    NASA Lewis Research Center Cleveland, OH 44135

  2. 2

    Cleveland State University Cleveland, OH

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1991

ISBN Information

Print ISBN: 9780470375099

Online ISBN: 9780470313831

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Keywords:

  • polymeric;
  • synthesis;
  • pyrolysis;
  • precursors;
  • hydrogen

Summary

An overview of two approaches to the formation of ceramic composite matrices from polymeric precursors is presented. Copolymerization of alkyl- amd alkenylsilanes (RSiH3) can be used to produce β-SiC on pyrolysis, with copolymer composition controlling polymer structure, char yield, and ceramic stoichiometry and morphology. Polysilsesquioxanes serve as precursors to Si-C-O ceramics. Copolymers of phenyl and methyl silsesquioxanes display rheological properties favorable for composite fabrication which can be tailored by control of pH, water/methoxy ratio, and copolymer composition. Composites obtained from these which utilize a carbon-coated, eight harness satin weave Nicalon© cloth reinforcement exhibit nonlinear stress-strain behavior in tension.