Chapter 2. High Temperature Fatigue Behavior of Mullite/SLC Multi-Composite Crack-Healed

  1. Rajan Tandon,
  2. Andrew Wereszczak and
  3. Edgar Lara-Curzio
  1. Wataru Nakao1,
  2. Jun Nakamura1,
  3. Koji Takahashi2 and
  4. Kotoji Ando2

Published Online: 27 MAR 2008

DOI: 10.1002/9780470291313.ch2

Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 2

Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 2

How to Cite

Nakao, W., Nakamura, J., Takahashi, K. and Ando, K. (2006) High Temperature Fatigue Behavior of Mullite/SLC Multi-Composite Crack-Healed, in Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 2 (eds R. Tandon, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291313.ch2

Author Information

  1. 1

    Yokohama National University 79–5 Tokiwadai, Hodogaya–ku, Yokohama, Japan, 240–8501 Masahiro Yokouchi

  2. 2

    Kanagawa Industrial Technology Research Institute 705–1 Imaizumi, Ebina, Japan, 243–0435

Publication History

  1. Published Online: 27 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080528

Online ISBN: 9780470291313

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Keywords:

  • crack-healed;
  • certain inherent;
  • tensile stress;
  • scw

Summary

Static fatigue behavior of mullite/15vol% SiC whisker/10vol% SiC particle multi–composite was investigated at temperatures from 1273 K to 1473 K. Mullite/15vol% SiC whisker/ 10vol% SiC particle multi–composite is good candidate material for use ceramic spring, because of its low Young's modulus as well as its reliability guaranteed by excellent crack–healing ability. However, before estimating the usefulness of the composite as ceramic spring at high temperature, we must know the fatigue limit at high temperature. Mullite/ 15vol% SiC whisker/ 10vol% SiC particle multi–composite test specimens were pre–cracked indentation (surface length of 100 (im) and crack–healed at 1573 K for 2 h in air. The times to failure were investigated when the crack–healed test specimens were applied the elevated tensile stress in air at temperatures from 1273 K to 1473 K. The fatigue limit was determined from the test results. Below 1273 K, the fatigue limit of the crack–healed composite was found to be almost equal to the corresponding flexure strength. Therefore, the composite was not susceptible to fatigue due to crack–healing. In contrast, the fatigue limit of the crack–healed composite was found to be less than the corresponding flexure strength above 1373 K, because the matrix and the crack–healed region fatigue above 1373 K and 1473 K, respectively.