Chapter 59. Oxidation and Retained Strength of in situ O'- β Sialon Composites

  1. John B. Wachtman Jr.
  1. M. H. O'Brien1,
  2. C. M. Huang2 and
  3. D. N. Coon2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314180.ch59

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

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

O'Brien, M. H., Huang, C. M. and Coon, D. N. (1993) Oxidation and Retained Strength of in situ O'- β Sialon Composites, 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.ch59

Author Information

  1. 1

    Idaho National Engineering Laboratory P.O. 1625 Idaho Falls, ID 83415-2218, (208)526-1849

  2. 2

    Department of Mechanical Engineering, University of Wyoming University Station, Box 3295 Laramie, WY 82070 (307) 766-4192

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375266

Online ISBN: 9780470314180

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Keywords:

  • compositions;
  • oxidation;
  • silicon oxynitride;
  • microstructures;
  • compatibility

Summary

Pressureless sintered multi-phase in situ SiAlON composites having compositions between O' and β'(z<1) SiAlON are characterized. Oxidation kinetics and retained strength after oxidation are presented as a function of original phase content. The highest O' SiAlON content samples were significantly more resistant to passive oxidation in air. The activation energies suggest control by oxygen diffusion. Overall rates of oxidation are dominated by the Arrhenius frequency factor. In general, the retained strength after oxidation increased with the oxidation resistance, but was strongly influenced by the microstructure of the oxide surface layer.