Chapter 34. Comparison of Tension, Compression, and Flexure Creep for Alumina and Silicon Nitride Ceramics

  1. John B. Wachtman Jr.
  1. M. K. Ferber,
  2. M. G. Jenkins and
  3. V. J. Tennery

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313008.ch34

A Collection of Papers Presented at the 14th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 7/8

A Collection of Papers Presented at the 14th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 7/8

How to Cite

Ferber, M. K., Jenkins, M. G. and Tennery, V. J. (1990) Comparison of Tension, Compression, and Flexure Creep for Alumina and Silicon Nitride Ceramics, in A Collection of Papers Presented at the 14th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313008.ch34

Author Information

  1. Oak Ridge National Laboratory Oak Ridge, TN 37831-6064

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1990

ISBN Information

Print ISBN: 9780470374924

Online ISBN: 9780470313008

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Keywords:

  • deformation;
  • silicon carbide;
  • silicon nitride;
  • characterization;
  • thermal stress

Summary

The stress sensitivity of the creep rate of commercially available Al2O3 and Si3N4 ceramics was measured at elevated temperatures using tension, compression, and flexure specimens. Pronounced differences in creep deformation behavior measured in compression and tension were observed for both ceramics. Fractographic studies suggested that these differences were attributed to the effects of creep cavitation which occurred under tensile loading. Data generated from the flexure creep testing were found to be in fair agreement with results predicted from existing creep deformation models.