Chapter 79. Thermomechanical Analysis of the Low Oxygen Silicon Carbide Fibers Derived from Polycarbosilane
- John B. Wachtman Jr.
Published Online: 28 MAR 2008
Copyright © 1993 The American Ceramic Society
Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8
How to Cite
Takeda, M., Imai, Y., Ichikawa, H., Ishikawa, T., Kasai, N., Seguchi, T. and Okamura, K. (1993) Thermomechanical Analysis of the Low Oxygen Silicon Carbide Fibers Derived from Polycarbosilane, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314180.ch79
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1993
Print ISBN: 9780470375266
Online ISBN: 9780470314180
- polycarbosilane fibers;
The low oxygen SiC fibers were prepared by curing of polycarbosilane fibers with electron beam irradiation and pyrolysis. These SiC fibers were continuous, in multi-filament form, and consisted of Si-13C-0.02O by atomic ratio. They had a high tensile strength and an elastic modulus of 2.8GPa and 270GPa, respectively. The low oxygen SiC fiber retained high strength and modulus after 10 hours exposure at 1873K in argon. It exhibits outstanding thermal stability as compared to other polymer-derived ceramic fibers. This fiber should be one of the best candidates for the reinforcement of ceramic matrix composites. At 1773K, tensile strength and modulus of the SiC fiber were lower than that at room temperature, because of plastic deformation. The SiC fiber with larger crystallite size tends to retain higher modulus at elevated temperature.