Chapter 46. Influence of Heat Treatment on Creep Behavior of a Sintered Si3N4 Ceramic

  1. John B. Wachtman Jr.
  1. K. C. Liu,
  2. C. O. Stevens,
  3. C. R. Brinkman,
  4. J. O. Kiggans and
  5. T. N. Tiegs

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314821.ch46

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3

How to Cite

Liu, K. C., Stevens, C. O., Brinkman, C. R., Kiggans, J. O. and Tiegs, T. N. (1996) Influence of Heat Treatment on Creep Behavior of a Sintered Si3N4 Ceramic, in Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314821.ch46

Author Information

  1. Oak Ridge National Laboratory, P. O. Box 2008 Oak Ridge, TN 37831

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1996

ISBN Information

Print ISBN: 9780470375426

Online ISBN: 9780470314821

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Keywords:

  • fabrication;
  • ceramic materials;
  • mechanical strength;
  • reliability;
  • microwave annealing

Summary

Creep behavior was investigated for a sintered Si3N4 ceramic having been subjected to various post-fabrication heat treatments: microwave annealing at 1200°C (with preannealing at 1100°C for 10 h), 1400, 1500, and 1600°C for 10 h, and resistance-heating furnace annealing at 1200°C for 100 h. Test results at 1200°C showed that microwave annealing at 1200°C can significantly enhance the creep resistance of this material, but showed adverse effects for the material annealed at 1400°C or higher. Furnace annealing at 1200°C for 100 h was somewhat effective in lowering creep rate, hence, resulted in longer creep life compared to that of the unannealed material, but was far less effective than microwave annealing at 1200°C. Some inconsistency in creep behavior was observed, most likely resulting from non-uniformity in microwave annealing. material variation, and bias due to test machines or heating methods. This paper is an interim report which will be finalized upon completion of ongoing microstructural studies.