Chapter 41. The Effects of an Aggressive Environment on the Subcritical Crack Growth of a Continuous-Fiber Ceramic Composite

  1. John B. Wachtman Jr.
  1. C. H. Henager Jr. and
  2. R. H. Jones

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313954.ch41

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8

How to Cite

Henager, C. H. and Jones, R. H. (1994) The Effects of an Aggressive Environment on the Subcritical Crack Growth of a Continuous-Fiber Ceramic Composite, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313954.ch41

Author Information

  1. Battelle, Pacific Northwest Laboratory, Battelle Blvd., Richland, WA 99352

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375174

Online ISBN: 9780470313954

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Keywords:

  • ceramic;
  • micromechanics;
  • temperature;
  • atmospheres;
  • logarithmic

Summary

Time-dependent crack growth measurements of ceramic composites in aggressive environments are being conducted on materials consisting of CVI SiC reinforced with Nicalon fibers (SiC/SiCf) having C and ON fiber-matrix inteqaces. Crack velocities are determined as a function of applied stress intensity. Results have been obtained for crack velocity-stress intensity relationships in pure Ar and in Ar plus 2000 ppm O2 atmospheres at 1100°C. A 20 micromechanics model is used to represent the time-dependence of observed crack bridging events and is able to rationalize the observed phenomena.