Chapter 4. Fully Reversed Bending Fatigue of Si3N4/SiCw and Si3N4 in Different Environments
- John B. Wachtman Jr.
Published Online: 28 MAR 2008
Copyright © 1994 The American Ceramic Society
Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4
How to Cite
Mäntylä, T. A. and Vuorinen, P. T. (1994) Fully Reversed Bending Fatigue of Si3N4/SiCw and Si3N4 in Different Environments, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314500.ch4
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1994
Print ISBN: 9780470375327
Online ISBN: 9780470314500
The fatigue of a silicon nitride and silicon carbide whisker reinforced silicon nitride (10vol% of SiCW) was studied in three different environments; in water, in air and in non-aqueous liquid, cyclohexane. Testing was made with natural flaw distribution. Fatigue mode was sinusoidal fully reversed bending tension-compression with R=-1. These materials showed high fatigue resistance and no clear cyclic fatigue effects could be found, especially in non-aqueous environment. The fatigue of the composite showed slight dependency on the environment indicating that the environment induced growth of the surface flaws may cause the fatigue. This environmental effect was not so clear in the silicon nitride without whiskers.