Chapter 27. Process Improvement for Si3N4 for Heat Engine Applications
- John B. Wachtman Jr
Published Online: 26 MAR 2008
Copyright © 1988 The American Ceramics Society, Inc.
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
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1988
Print ISBN: 9780470374818
Online ISBN: 9780470310502
- weibull modulus;
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.