Chapter 28. Effects of Porosity on Thermal Shock Resistance of Silicon Nitride Ceramics

  1. Hau-Tay Lin and
  2. Mrityunjay Singh
  1. J. H. She1,
  2. Y Beppu2,
  3. J. F. Yang3,
  4. D. D. Jayaseelan4 and
  5. T. Ohji4

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294758.ch28

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 23, Issue 4

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 23, Issue 4

How to Cite

She, J. H., Beppu, Y., Yang, J. F., Jayaseelan, D. D. and Ohji, T. (2002) Effects of Porosity on Thermal Shock Resistance of Silicon Nitride Ceramics, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 23, Issue 4 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294758.ch28

Author Information

  1. 1

    Synergy Materials Research Center, AIST, Nagoya 463–8687, Japan

  2. 2

    Synergy Ceramics Laboratory, FCRA, Nagoya 463–8687, Japan

  3. 3

    Japan Science and Technology Corporation Nagoya 463–8687, Japan

  4. 4

    Synergy Materials Research Center, AIST Nagoya 463–8687, Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375792

Online ISBN: 9780470294758

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Keywords:

  • binder induced porosity;
  • tape casting;
  • propagation;
  • slipcast alumina;
  • sintering

Summary

A water-quenching technique was employed to investigate the effect of porosity on the thermal shock behavior of Si3N4 ceramics. It is shown that the critical temperature difference for crack initiation decreases with increasing porosity. However, the presence of more pores increases the resistance to crack propagation. In low-porosity Si3N4, crack was observed to propagate catastrophically. In contrast, highly porous Si3N4 ceramics exhibited a quasi-static crack propagation and thus a gradual reduction in strength with quenching severity.