Chapter 11. Creep Behavior of Flexure Beam Specimens of Sic Whisker-Reinforced Composite and Monolithic Silicon Nitrides
- 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
Choi, S. R., Salem, J. A. and Sanders, W. A. (1993) Creep Behavior of Flexure Beam Specimens of Sic Whisker-Reinforced Composite and Monolithic Silicon Nitrides, 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.ch11
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1993
Print ISBN: 9780470375266
Online ISBN: 9780470314180
The creep behavior of a SIC whisker-reinforced (30-vol %) silicon nitride and a similar monolithic silicon nitride was determined In flexure In air at 1250°C. The steady-state creep data were obtained as a function of applied stress from 200 to 370 Mpa. The composite material exhibited higher creep susceptibility as compared to the monolithic counterpart. The appropriateness of bend tests as a means of lifetime prediction methodology was evaluated from the conventional elastic solution based on the curvature measurements and from the neutral axis determinations. This result was also compared with the asymmetric creep behavior shown by other silicon nitride and with the symmetric creep behavior by a stainless steel.