Chapter 25. Effects of Processing, Oxidation, & Fiber Architecture on Thermal & Mechanical Properties of BN-Nextel™ 312/Blackglas™ Composites

  1. John B. Wachtman Jr
  1. A. Tobin1,
  2. J. Holmes2,
  3. K. R. Vaidyanathan3,
  4. W. R. Cannon3 and
  5. S. C. Danforth3

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314715.ch25

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

Tobin, A., Holmes, J., Vaidyanathan, K. R., Cannon, W. R. and Danforth, S. C. (1995) Effects of Processing, Oxidation, & Fiber Architecture on Thermal & Mechanical Properties of BN-Nextel™ 312/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.ch25

Author Information

  1. 1

    Northrop Grumman R&D, Bethpage, NY 11714

  2. 2

    University of Michigan, Ann Arbor, MI 48109

  3. 3

    Rutgers University, Piscataway, NJ 08855

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:

  • elevated-temperature;
  • ammonia;
  • interlaminar;
  • interturbine;
  • seal

Summary

Boron nitride (BN)-coated Nextel™ 312 fibers produced via ammonia nitridation have exhibited useful, elevated-temperature mechanical properties when processed in a Blackglas matrix. To qualify this system for application to an engine interturbine seal, a set of thermal and mechanical properties was generated on 2-D laminates, and the effects of pre-oxidation, fiber architecture, laminate thickness, test temperature, and processing on the tension, compression, interlaminar shear, flexure, creep, fiber pullout, thermal diffusivity, and thermal expansion were measured. Results indicate that a pre-oxidation stabilization treatment led to a temperature-independent set of thermal and mechanical properties that should be adequate for the interturbine seal application.