Chapter 51. Effect of Powder Characteristics on the α-to-β Si3N4 Transformation Kinetics

  1. J. P. Singh
  1. T. N. Tiegs,
  2. F. C. Montgomery,
  3. J. L. Schroeder,
  4. D. L. Barker and
  5. P. A. Menchhofer

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294444.ch51

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

Tiegs, T. N., Montgomery, F. C., Schroeder, J. L., Barker, D. L. and Menchhofer, P. A. (1997) Effect of Powder Characteristics on the α-to-β Si3N4 Transformation Kinetics, 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.ch51

Author Information

  1. Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, TN 37831-6087

Publication History

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

ISBN Information

Print ISBN: 9780470375532

Online ISBN: 9780470294444

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Keywords:

  • microstructure;
  • nucleation;
  • densification;
  • transformation;
  • morphology

Summary

β-phase nucleation and growth is an important step in the microstructure development of Si3N4 ceramics. Samples containing different powder types, sintering additives and α/β ratios were heated at intermediate temperatures and times to monitor the phase changes taking place. The rate of transformation was mainly dependent on the powder surface area and starting β–content. It was observed that additions of β–Si3N4 increased the rate of transformation.