Chapter 7. Properties of the Low Oxygen Content SiC Fiber on High Temperature Heat Treatment
- 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
Takeda, M., Imai, Y., Ichikawa, H., Ishikawa, T., Seguchi, T. and Okamura, K. (1991) Properties of the Low Oxygen Content SiC Fiber on High Temperature Heat Treatment, 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.ch7
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1991
Print ISBN: 9780470375099
Online ISBN: 9780470313831
An SiC fiber with excellent thermal stability has been developed by means of a reduction in its oxygen content. This low oxygen content SiC fiber was synthesized using a radiation curing process. Polycarbosilane (PCS) fiber was cured by irradiation with an electron beam in a helium atmosphere. The cured polycarbosilane fiber was pyrolyzed and an SiC fiber with a 0.4 wt% oxygen content was obtained. The low oxygen content SiC fibers were then heat-treated at 1773–2273 K and compared with an SiC fiber having 10 wt% oxygen cured by oxidation. The low oxygen content SiC fiber kept its fibrous form and was flexible even after the 2273 K treatment, while oxidation-cured fiber changed to a powder-like material with extreme crystal growth above 2073 K. The surface appearance and crystal structure of the fibers were analyzed using SEM and XRD, respectively.