Chapter 27. Microwave Sintering of Silicon Nitride

  1. John B. Wachtman Jr
  1. T. N. Tiegs,
  2. J. O. Kiggans and
  3. H. D. Kimrey

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313848.ch27

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 9/10

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 9/10

How to Cite

Tiegs, T. N., Kiggans, J. O. and Kimrey, H. D. (2008) Microwave Sintering of Silicon Nitride, in Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313848.ch27

Author Information

  1. Metals and Ceramics Division Oak Ridge National Laboratory P.O. Box 2008 Oak Ridge, TN 37831

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1991

ISBN Information

Print ISBN: 9780470375105

Online ISBN: 9780470313848

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Keywords:

  • microwaves;
  • ceramics;
  • alumina;
  • microstructure;
  • configuration

Summary

Sintering studies of Si3N4-based materials were performed to identify those aspects of microwave processing that would lead to unique microstructures not obtainable by conventional methods. Coupling to the Si3N4 Materials occurs in the sintering additives, and initial samples experienced severe cracking due to nonuniform heating. Successful sintering was achieved by using methods to improved the heating uniformity, such as the addition of secondary particulates that couple well, use of higher sintering additive contents, and use of higher frequency microwaves. Microwave sintering of Si3N4-based materials showed improved densification and enhanced grain growth as compared to samples heated conventionally under similar conditions.