Chapter 15. SiC-Based Fibrous Monolithic Ceramics
- John B. Wachtman Jr.
Published Online: 26 MAR 2008
Copyright © 1993 The American Ceramic Society
Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10
How to Cite
Baskaran, S. and Halloran, J. W. (1993) SiC-Based Fibrous Monolithic Ceramics, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314234.ch15
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1993
Print ISBN: 9780470375273
Online ISBN: 9780470314234
- composite processing methods;
- fibrous monoliths
Fibrous monoliths are high toughness, flaw tolerant, monolithic ceramics having a fibrous texture of polycrystalline cells and cell boundaries. SiC/graphite fibrous monoliths have been prepared by hot pressing graphite-coated SiC green fibers to produce monolithic ceramics having a fibrous texture with 50-micron wide SiC cells separated by 4-micron graphite cell boundaries. Flexural tests show non-precipitous load drop beyond the maximum stress (“graceful failure”). Fracture of bend specimens is accompanied by delamination cracking and shear failure along the graphite cell boundaries. Typical properties include apparent flexural strength of 220 MPa and apparent work-of-fracture of 1300 J/m2. Oxidation resistant fibrous monoliths have been demonstrated with the SiC/BN system.