Chapter 15. SiC-Based Fibrous Monolithic Ceramics

  1. John B. Wachtman Jr.
  1. S. Baskaran and
  2. J. W. Halloran

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314234.ch15

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

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. (2008) 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

Author Information

  1. Department of Materials Science and Engineering University of Michigan, Ann Arbor, MI 48109–2136

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375273

Online ISBN: 9780470314234

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Keywords:

  • monolithic;
  • ceramics;
  • delamination;
  • composite processing methods;
  • fibrous monoliths

Summary

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.