Chapter 54. Porous Silicon Nitride with Oriented Anisotropic Pores

  1. J. P. Singh
  1. Yasuhiro Shigegaki1,
  2. Manuel E. Brito2,
  3. Kiyoshi Hirao2,
  4. Motohiro Toriyama2 and
  5. Shuzo Kanzaki2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294444.ch54

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4

How to Cite

Shigegaki, Y., Brito, M. E., Hirao, K., Toriyama, M. and Kanzaki, S. (1997) Porous Silicon Nitride with Oriented Anisotropic Pores, in Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4 (ed J. P. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294444.ch54

Author Information

  1. 1

    Synergy Ceramics Laboratory, Fine Ceramics Research Association, Nagoya 462 Japan

  2. 2

    National Industrial Research Institute of Nagoya, Nagoya 462 Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1997

ISBN Information

Print ISBN: 9780470375532

Online ISBN: 9780470294444

SEARCH

Keywords:

  • mechanical properties;
  • sintering;
  • young's modulus;
  • orientation;
  • microstructure

Summary

Pores in silicon nitride are regarded responsible for poor mechanical performance. We demonstrate that a microstructure with anisotropic pores has good potential to realize synergistic performance, attaining concurrently pore-derived beneficial effects and improved mechanical properties. Porous silicon nitride with oriented anisotropic pores was fabricated by stacking tape casted sheets composed of β–Si3N4 whisker and sintering additives, followed by gas pressure sintering. After processing, a novel porous structure with tightly tangled rod-like grains and anisotropic pores was obtained. This material exhibited a high fracture stress, even though it contained 14.4 % porosity.