Chapter 7. Application of Microwave Heating for Fabrication of Silicon Nitride Ceramics

  1. John B. Wachtman Jr.
  1. Terry N. Tiegs,
  2. James O. Kiggans and
  3. Kristin L. Ploetz

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314234.ch7

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10

How to Cite

Tiegs, T. N., Kiggans, J. O. and Ploetz, K. L. (1993) Application of Microwave Heating for Fabrication of Silicon Nitride Ceramics, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314234.ch7

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 1993

ISBN Information

Print ISBN: 9780470375273

Online ISBN: 9780470314234

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Keywords:

  • conventional heating;
  • sintering;
  • thermal processing;
  • thermal gradient;
  • transparent

Summary

Microwave processing of silicon nitride-based ceramics was examined to identify aspects that would have advantages over conventional heating such as improved fabrication parameters or increased mechanical properties. Areas of microwave processing examined were sintering of powder compacts and sintering of reaction-bonded silicon nitride. The sintering of powder compacts showed improved densification and enhanced grain growth. However, the high additive levels required to produce crack-free parts generally limit these materials to low temperature applications. Sintered reaction-bonded silicon nitride materials were fabricated in the microwave with a one-step process using cost-effective raw materials. The materials had properties appropriate for structural applications.