Chapter 3. Superplasticity in Silicon Nitride

  1. J. P. Singh
  1. J. A. Schneider and
  2. A. K. Mukherjee

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294444.ch3

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

Schneider, J. A. and Mukherjee, A. K. (1997) Superplasticity in Silicon Nitride, 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.ch3

Author Information

  1. Department of Chemical and Material Science Engineering, University of California, Davis, Davis, California 95616

Publication History

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

ISBN Information

Print ISBN: 9780470375532

Online ISBN: 9780470294444

SEARCH

Keywords:

  • morphology;
  • microstructure;
  • deformation;
  • consolidation;
  • thermal equilibrium

Summary

Silicon nitride specimens with an equiaxed morphology were prepared by rapid consolidation to retain a fine grain size of 100-500 nm with a composition of 69–89% of the initial α-phase. Deformation behavior was evaluated in compression at 1723–1773K in the strain rate range of 10−4 - 10−6 s−1. A flow stress exponential tending toward 2 was obtained from the stress vs. strain data with an activation energy of 400 kJ/mol. The resulting microstructure of the deformed specimen consisted of equiaxed β-phase grains.