Chapter 57. Evaluation of Oxidation Exposure on the Mechanical Properties of Nextel™ 312/BN/Blackglas™ Composites

  1. John B. Wachtman Jr
  1. K. Ranji Vaidyanathan1,
  2. W. Roger Cannon1,
  3. Stephen C. Danforth1,
  4. Albert G. Tobin2 and
  5. John W. Holmes3

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314715.ch57

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4

How to Cite

Vaidyanathan, K. R., Cannon, W. R., Danforth, S. C., Tobin, A. G. and Holmes, J. W. (1995) Evaluation of Oxidation Exposure on the Mechanical Properties of Nextel™ 312/BN/Blackglas™ Composites, in Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314715.ch57

Author Information

  1. 1

    Center for Ceramic Research, Rutgers University, Piscataway, NJ 08855-0909

  2. 2

    Grumman Aerospace & Electronics R&D Center, Bethpage, NY 11714

  3. 3

    Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48105

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1995

ISBN Information

Print ISBN: 9780470375372

Online ISBN: 9780470314715

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Keywords:

  • environments;
  • oxidation;
  • microstructural;
  • tensile;
  • flexural

Summary

Ceramic matrix components based on a Blackglas™ matrix reinforced with Nextel™ 312 fibers with a BN rich surface layer are being investigated for gas turbine engine applications in a temperature range of 500–600°C. The issue of long term thermal and mechanical stability of the composite in the cyclic oxidizing engine environments need to be addressed and resolved before final acceptance of these materials for critical components in elevated temperature applications. The effects of oxidation on tensile and flexural properties were investigated after composite exposure to flowing air at 600°C for 20-2000h. Microstructural changes in the composite due to oxidation were identified. A significant reduction in the tensile properties accompanied by increases in fiber pull-out were observed after oxidation for 96 hours. After 500 hours oxidation, the flexural strength decreased by 50% relative to as-prepared composites. However, such a large reduction in strength was not observed in composites oxidized at lOOOh and 2000h.