Chapter 48. Blackglas™-Nicalon™ Composites with CVD Boron Nitride Fiber Interface Coatings

  1. John B. Wachtman Jr
  1. S. T. Gonczy1,
  2. E. P. Butler2,
  3. N. R. Khasgiwale2,
  4. L. Tsakalakos2,
  5. W. R. Cannon2 and
  6. S. C. Danforth2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314715.ch48

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

Gonczy, S. T., Butler, E. P., Khasgiwale, N. R., Tsakalakos, L., Cannon, W. R. and Danforth, S. C. (2008) Blackglas™-Nicalon™ Composites with CVD Boron Nitride Fiber Interface Coatings, 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.ch48

Author Information

  1. 1

    AlliedSignal Inc., Des Plaines, IL 60017

  2. 2

    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:

  • fabric-reinforced;
  • embrittled;
  • monolithic;
  • deflection;
  • blackglas

Summary

Nicalon fabric-reinforced 2-D ceramic composites were fabricated and tested using a CVD boron nitride (BN) interface coating at two thickness' (0.3 and 0.6 micron) with a silicon oxycarbide matrix (Blackglas™). The 0.6 micron thick BN coatings gave the most extensive fibrous fracture with flexure strengths and strains of 280 MPa and 0.65%. Oxidation at 600°C for 100 hours reduced the composite strength and strain (200 MPa and 0.57%) but maintained fibrous failure with no embrittlement. Oxidation at 800°C produced low strength (100 MPa), low strain (0.22%) failure in the embrittled composite. Microstructural analysis of the fibers and the composites showed a uniform, adherent boron nitride coating, resistant to 600°C oxidation.