Chapter 43. Stress-Rupture and Stress-Relaxation Behaviors of PIP-SiC/SiC Composites
- Hua-Tay Lin,
- Mrityunjay Singh
Published Online: 26 MAR 2008
DOI: 10.1002/9780470294741.ch43
Copyright © 2002 The American Ceramic Society
Book Title
26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3
Additional Information
How to Cite
Nozawa, T., Kohyama, A. and Lara-Curzio, E. (2008) Stress-Rupture and Stress-Relaxation Behaviors of PIP-SiC/SiC Composites, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294741.ch43
Publication History
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 2002
Book Series:
ISBN Information
Print ISBN: 9780470375785
Online ISBN: 9780470294741
- Summary
- Chapter
- References
Keywords:
- SiC/SiC composites;
- stress-rupture;
- stress-relaxation;
- proportional limit;
- mechanical stabilities
Summary
In order to identify the long-term durability of SiC/SiC composites fabricated by polymer impregnation and pyrolysis process, stress-rupture and stress-relaxation behaviors were investigated in ambient air at 1273 K at the stress level of 25, 35 and 45 MPa. It was found that, in stress-rupture, strain of the material increased rapidly just after holding stress in the case that the applied stress, 45 MPa, was above proportional limit (35 MPa), and, on the while, the others below proportional limit showed continuous increases with time. SiC/SiC composites used in this study showed a remarkable improvement in creep properties in ambient air, compared with C/SiC. SiC/SiC composites had also a good durability in the long-term stress-relaxation test. From this work, it was found that the correlation between stress-relaxation and stress-rupture might be determined by the oxidation effect.