Chapter 16. Microstructural and Strength Stability of CVD SiC Fibers in Argon Environments
- John B. Wachtman Jr
Published Online: 26 MAR 2008
Copyright © 1991 The American Ceramic Society, Inc.
Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 9/10
How to Cite
Bhatt, R. T. and Hull, D. R. (1991) Microstructural and Strength Stability of CVD SiC Fibers in Argon Environments, in Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313848.ch16
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1991
Print ISBN: 9780470375105
Online ISBN: 9780470313848
The room temperature tensile strength and microstructure of three types of commercially available chemically vapor deposited silicon carbide fibers were measured after 1, 10 and 100 h heat treatments under argon pressures of 0.1-310 MPa at temperatures to 2100ď. Two types of fiber had carbon-rich surface coatings and the other contained no coating. All three fiber types showed strength degradation beyond 1400ď. Time and temperature of exposure had greater influence on strength degradation than argon pressure. Recrystallization and growth of near-stoichiometric SiC grains appear to be the dominant mechanisms for the strength degradation.