Chapter 61. Cyclic Oxidation of Monolithic SiC and Si3N4 Materials
- John B. Wachtman Jr.
Published Online: 28 MAR 2008
Copyright © 1993 The American Ceramic Society
Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8
How to Cite
Opila, E. J., Fox, D. S. and Barrett, C. A. (1993) Cyclic Oxidation of Monolithic SiC and Si3N4 Materials, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314180.ch61
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1993
Print ISBN: 9780470375266
Online ISBN: 9780470314180
Cyclic oxidation of monolithic CVD SiC, sintered alpha-SiC, CVD Si3N4 and HIPed Si3N4 has been performed. The oxidation behavior of samples subjected to five hour cycles in air at 1300 and 1500°C has been compared to that of samples with uninterrupted exposures of the same time and temperature. No difference between cyclic and uninterrupted oxidation rates or scale morphology was found after fifty hours of oxidation. Cyclic studies were continued to 500 hours. Typically, oxide growth continued to follow nearly parabolic kinetics and scale spallation was not observed. A comparison to models developed for cyclic oxidation of superalloys is made.