Chapter 49. Effect of Silicon Carbide Addition on a Self-Reinforced Silicon Nitride

  1. John B. Wachtman Jr.
  1. C. James Hwang,
  2. Kwanho Yang,
  3. Donald Beaman and
  4. Harold Klassen

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313978.ch49

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

How to Cite

Hwang, C. J., Yang, K., Beaman, D. and Klassen, H. (1994) Effect of Silicon Carbide Addition on a Self-Reinforced Silicon Nitride, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313978.ch49

Author Information

  1. The Dow Chemical Company, Midland, MI 48670

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375198

Online ISBN: 9780470313978

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Keywords:

  • diffusivity;
  • oxidation;
  • characterize;
  • diffusing;
  • rationalizing

Summary

Composites with a self-reinforced Si3N4 (SRS) matrix have been prepared by adding SiC of various morphologies, sizes and quantities. The variations in SiC addition have different effects upon densification, phase transformation, microstructural development and properties of the composites. Compared to monolithic SRS, the best composites contain, in relative order, SiC platelets, SiC whiskers and SiC particulates. A decrease in size or an increase in quantity slows down densification and phase transformation, hinders formation of needle-like microstructures, and impairs properties. Composites with concurrent whisker and platelet addition have characteristics that resemble those where only platelets are added.