Chapter 14. Effect of Y2O3 and Al2O3 on the Oxidation Resistance of Si3N4

  1. William J. Smothers
  1. L. L. Hench,
  2. P. N. Vaidyanathan and
  3. Sunil Dutta

Published Online: 26 MAR 2008

DOI: 10.1002/9780470318782.ch14

Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10

Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10

How to Cite

Hench, L. L., Vaidyanathan, P. N. and Dutta, S. (1982) Effect of Y2O3 and Al2O3 on the Oxidation Resistance of Si3N4, in Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10 (ed W. J. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470318782.ch14

Author Information

  1. Ceramics Div., Dept. of Materials Science and Engineering, University of Florida Gainesville, FL 32601

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1982

ISBN Information

Print ISBN: 9780470373972

Online ISBN: 9780470318782

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Keywords:

  • alkali resistance;
  • electrostatic;
  • pickle-free enamels;
  • enamels;
  • feasibility

Summary

Oxidation of cold-pressed and sintered Si3N4 containing 15 wt% Y2O3 and 2, 4, 6, and 8% Al2O3 is observed at temperatures as low as 1000°C with ir reflection spectroscopy Concentrations of Al2O3 >4% greatly retard the rate of oxidation and alter the mechanism of surface attack by promoting formation of a glassy layer on the surface containing mixed oxynitride bonds. The glassy layer retards heterogeneous attack and reduces the effect of an oxidation transition temperature between 1000° and 1100°C for these materials.