Chapter 27. Process Improvement for Si3N4 for Heat Engine Applications

  1. John B. Wachtman Jr
  1. H. Yeh1,
  2. H. Fang1 and
  3. K. Teng2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470310502.ch27

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

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

How to Cite

Yeh, H., Fang, H. and Teng, K. (1988) Process Improvement for Si3N4 for Heat Engine Applications, in 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310502.ch27

Author Information

  1. 1

    Allied-Signal Aerospace Company Garret Ceramic Components Div. Torrance, CA

  2. 2

    Allied-Signal Aerospace Company Garret Auxiliary Power Div. Phoenix, AZ

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780470374818

Online ISBN: 9780470310502

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Keywords:

  • parameters;
  • microstructural;
  • flexural;
  • weibull modulus;
  • monolithic

Summary

A statistically designed processing experiment was performed to identify and optimize critical processing parameters and compositions for sintered Si3N4. Process improvements which were monitored by strength testing and microstructural characterization resulted in improvements of 20% and 85% in Wiebull modulus. A newly developed composition achieved a flexural strength of 578.8 MPa (84 ksi) at 1399°C (2550° F). A SiC whisker toughened composite using this material as a matrix achieved a room temperature fracture toughness of 6.93 MPa m1/2.