Chapter 63. Effect of Heat-Treatment on Creep Behavior of a Self-Reinforced Silicon Nitride (Si3N4)

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Q. Wei,
  2. J. Sankar and
  3. J. Narayan

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch63

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

How to Cite

Wei, Q., Sankar, J. and Narayan, J. (2000) Effect of Heat-Treatment on Creep Behavior of a Self-Reinforced Silicon Nitride (Si3N4), in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294635.ch63

Author Information

  1. NSF Center for Advanced Materials and Smart Structures, Department of Mechanical Engineering, NC A&T State University, McNair Hall, East Market Street, Greensboro, NC 27411

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375693

Online ISBN: 9780470294635

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Keywords:

  • microwave annealed;
  • scanning electron microscopy;
  • transmission electron microscopic;
  • microwave annealed;
  • non oxide ceramics

Summary

We have investigated the effect of heat-treatment on the microstructural characteristics of the crept self-reinforced silicon nitride (Si3N3) ceramic GS44. It was found that both conventional furnace and microwave annealing enhance the creep resistance of the material, and microwave annealing had the most significant effect. Fractography showed that the microwave annealed samples exhibits least creep damage. Furnace annealing also reduces the creep damage, but the effect is far less as compared to microwave annealing. Scanning electron microscopy (SEM) analysis showed much more cavitation in the as-sintered samples than in the furnace and microwave annealed samples. Transmission electron microscopic (TEM) observations showed significant devitrification of the amorphous phases in the microwave annealed specimens, which explains the improvement in the creep resistance.