Chapter 28. Crack Growth Behavior of SiCf/SiC Composite at Room and High Temperatures

  1. John B. Wachtman Jr.
  1. S. Raghuraman1,
  2. J. F. Stubbins1,
  3. M. K. Ferber2 and
  4. A. A. Wereszczak2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314555.ch28

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

How to Cite

Raghuraman, S., Stubbins, J. F., Ferber, M. K. and Wereszczak, A. A. (1994) Crack Growth Behavior of SiCf/SiC Composite at Room and High Temperatures, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314555.ch28

Author Information

  1. 1

    Department of Nuclear Engineering University of Illinois at Urbana-Champaign Urbana, IL 61801

  2. 2

    High Temperature Materials Laboratory Oak Ridge National Laboratory Oak Ridge, TN 37831–6064

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375334

Online ISBN: 9780470314555

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Keywords:

  • fiber reinforced ceramic composite;
  • fiber related toughening processes;
  • cyclic loading;
  • crack growth resistance;
  • continuous fiber ceramic composite

Summary

The fiber reinforced ceramic composite, SiCf/SiC, exhibits enhanced crack growth resistance at room temperature due to fiber related toughening processes. In order to assess the effect of cyclic loading on crack growth, center notched specimens were tested under tension/tension cyclic loading. Under cyclic loading there is a progressive loss of toughening, and the crack growth rate increases with decreasing load ratio, R (R=minimum load/maximum load). For high temperature tests, flexure specimens were used. At high temperatures, additional damage processes such as creep and oxidation take place, and affect the crack growth behavior. The test results and microstructural aspects of crack growth behavior will be discussed.