Chapter 17. Porous Silicon Nitride from Fine/Coarse Powder Mixture

  1. Mrityunjay Singh and
  2. Todd Jessen
  1. Masato Ishizaki,
  2. Masateru Nishi,
  3. Yasuhiro Shigegaki and
  4. Tadashi Sasa

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294703.ch17

25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 22, Issue 4

25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 22, Issue 4

How to Cite

Ishizaki, M., Nishi, M., Shigegaki, Y. and Sasa, T. (2001) Porous Silicon Nitride from Fine/Coarse Powder Mixture, in 25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 22, Issue 4 (eds M. Singh and T. Jessen), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294703.ch17

Author Information

  1. Materials Technology Department, Research Laboratory, Ishikawajima-Harima Heavy Industries Co., Ltd. 3–1-15 Toyosu, Koto-ku, Tokyo 135–8732 Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2001

ISBN Information

Print ISBN: 9780470375747

Online ISBN: 9780470294703

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Keywords:

  • porosity;
  • mechanical properties;
  • modulus;
  • saturation;
  • silicon nitride

Summary

Porous silicon nitride was sintered from powder mixtures of fme and coarse grain powders, and the relationship of porosity and mechanical properties was studied. the shape of the pore was equiaxial with the typical diameter of 8 pm. the bending strength and the elastic modulus of the specimen with 30% porosity were 250 MPa and 145 GPa, respectively. the weight increase by oxidation at 1400°C in air showed saturation within 10 hours of the specimen with sintering agent of Y2O3 + Al2O3, whereas that of Yb2O3 + SiO2 did not show saturation after 50 hours.