Chapter 31. Cyclic Fatigue of Sintered Si3N4

  1. John B. Wachtman Jr
  1. M. Masuda,
  2. T. Soma,
  3. M. Matsui and
  4. I. Oda

Published Online: 26 MAR 2008

DOI: 10.1002/9780470310502.ch31

12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10

12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10

How to Cite

Masuda, M., Soma, T., Matsui, M. and Oda, I. (1988) Cyclic Fatigue of Sintered Si3N4, in 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310502.ch31

Author Information

  1. NGK Insulators, Ltd. Nagoya, Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780470374818

Online ISBN: 9780470310502

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Keywords:

  • cyclic fatigue;
  • amplitude;
  • fatigue;
  • mechanical strength;
  • heat resistance

Summary

Tension-compression fatigue tests and alternating cantilever bending fatigue tests were carried out to clarify cyclic fatigue of sintered Si3N4. It was found that alternating loads decreased the fatigue strength to a larger extent than a pulsating load did. The fatigue failure diagram was drawn to show the effects of mean stress and stress amplitude on the fatigue strength. It is concluded that the design method proposed for the metal fatigue is applicable to the sintered Si3N4 in this study. Cyclic fatigue at room temperature depended mainly on the number of the cycles accumulated rather than on time. The distributions for the fatigue life were presented in Weibull plots. Microstructural observations suggest that cyclic fatigue of sintered Si3N4 is caused by the formation of microcracks at grain boundaries.