Chapter 28. Polymeric Routes to Silicon Carbide and Silicon Oxycarbide CMC
- John B. Wachtman Jr
Published Online: 28 MAR 2008
Copyright © 1991 The American Ceramic Society, Inc.
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
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1991
Print ISBN: 9780470375099
Online ISBN: 9780470313831
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.