Chapter 31. Hot Isostatic Pressing of Sintered Si3N4 Ceramics

  1. John B. Wachtman Jr
  1. K. P. Plucknett and
  2. M. H. Lewis

Published Online: 28 MAR 2008

DOI: 10.1002/9780470313831.ch31

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

How to Cite

Plucknett, K. P. and Lewis, M. H. (1991) Hot Isostatic Pressing of Sintered Si3N4 Ceramics, in Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313831.ch31

Author Information

  1. Centre for Advanced Materials Technology University of Warwick Coventry U.K.

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1991

ISBN Information

Print ISBN: 9780470375099

Online ISBN: 9780470313831

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Keywords:

  • atmosphere;
  • morphology;
  • microstructure;
  • isostatic;
  • anisotropic

Summary

Pressureless sintered Si3N4 ceramics have been hot isostatically pressed (HIP'ed) in a nitrogen atmosphere. An increase in density was observed for all HIP'ed ceramics, although theoretical density was not achieved. The effects of HIP'ing upon bulk microstructure and pore morphology are discussed. Structural modification of the surface and subsurface microstructure occurred during HIP'ing; following reaction between the ceramic and pressurizing gas (N2) Room temperature strength remained essentially unaltered after HIP'ing; however, Weibull modulus was increased. Additionally, HIP'ing had minimal effect upon the bulk oxidation behavior of the ceramics examined.