Chapter 17. Short-Crack T-Curves and Damage Tolerance in Alumina-Based Composites

  1. John B. Wachtman Jr.
  1. Linda M. Braun,
  2. Stephen J. Bennison and
  3. Brian R. Lawn

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313954.ch17

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

Braun, L. M., Bennison, S. J. and Lawn, B. R. (2008) Short-Crack T-Curves and Damage Tolerance in Alumina-Based Composites, 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.ch17

Author Information

  1. Materials Science and Engineering Laboratory, National Institute of Standards & Technology, Gaithersburg, MD 20899

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:

  • parameters;
  • mechanism;
  • evolution;
  • microstructure;
  • agglomerates

Summary

A procedure for evaluating short-crack toughness curves (T-curves) from quantitative in situ observations of Vickers indentation cracks during stressing is described. We demonstrate the procedure with results on an Al2O3-Al2TiO5 composite with strong T-curve behavior and attendant crack stabilization from grain-localized-crack-bridging. The stabilization allows the material to tolerate multiple damage accumulation during loading.