Chapter 58. The Effect of Sodium Sulfate on the Room Temperature Strength of a Yttria Containing Silicon Nitride

  1. John B. Wachtman Jr.
  1. G. L. Leatherman1,
  2. R. N. Katz2,
  3. G. Bartkowski3,
  4. T. Chadwick3 and
  5. D. King3

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314180.ch58

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

Leatherman, G. L., Katz, R. N., Bartkowski, G., Chadwick, T. and King, D. (1993) The Effect of Sodium Sulfate on the Room Temperature Strength of a Yttria Containing Silicon Nitride, 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.ch58

Author Information

  1. 1

    S.A.I.C., Germantown, MD 20874

  2. 2

    Army Research Laboratory, Watertown, MA 02172

  3. 3

    Worcester Polytechnic Institute, Worcester, MA 01609

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:

  • oxidation;
  • sodium sulfate;
  • corrosion;
  • exposed;
  • ceramics

Summary

In this paper, strength and Weibull data for a hot isostatically pressed yttria-containing silicon nitride in the as-received state, after oxidation, and after exposure to sodium sulfate are presented. Oxidation alone increased the mean flexural strength but decreased the Weibull modulus with respect to the as-received material. Exposure to sodium sulfate decreased the flexural strength and the Weibull modulus with respect to the as-received material. Oxidation and corrosion products as a function of distance from the exposed surface were determined. Exposure to sodium sulfate produced reaction products that differed from those produced by oxidation in air.