Chapter 62. Testing and Finite Element Analysis of Sintered Silicon Nitride Specimens Under Four-Point Bending

  1. Todd Jessen,
  2. Ersan Ustundag
  1. J. Lua1,
  2. J. Sankar2,
  3. S. Yarmolenko2,
  4. W. Windley III2,
  5. D. Pai2,
  6. L. C. Russell2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch62

Book Title

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

Additional Information

How to Cite

Lua, J., Sankar, J., Yarmolenko, S., Windley, W., Pai, D. and Russell, L. C. (2008) Testing and Finite Element Analysis of Sintered Silicon Nitride Specimens Under Four-Point Bending, 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.ch62

Author Information

  1. 1

    A&T Engineering Technology Center, An Anteon Company 240 Oral School Road, Mystic, CT 06355–1208

  2. 2

    NSF Center for Advanced Materials and Smart Structures, North Carolina A&T State University, 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:

  • silicon nitride;
  • mechanical properties;
  • protective barrier coatings;
  • shield silicon;
  • ambient temperature

Summary

Both static and fatigue behavior of sintered silicon nitride was studied in flexure at room and elevated temperatures to determine the effect of temperature and cyclic loading on mechanical properties. An easy and cost effective four-point bending was used during the experimental investigation. It was found from quasistatic flexural tests that both the failure strength and Young's modulus dropped as the temperature was increased. Experiments also showed that modulus remained constant during flexural fatigue tests at room temperature while the test at 1000°C resulted in a drop of 6–10 % during the initial 1000 cycles. A base line finite element model for a sintered silicon nitride bending specimen was developed. The accuracy and validity of the finite element model was validated through comparison of model predictions with experimental data.

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