Chapter 50. Evaluation of the Interfacial Mechanical Properties of Fiber Reinforced Boron Nitride Matrix Composites

  1. John B. Wachtman Jr.
  1. C. G. Cofer1,
  2. J. Economy1,
  3. M. K. Ferber2 and
  4. E. Lara-Curzio2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314500.ch50

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4

How to Cite

Cofer, C. G., Economy, J., Ferber, M. K. and Lara-Curzio, E. (1994) Evaluation of the Interfacial Mechanical Properties of Fiber Reinforced Boron Nitride Matrix Composites, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314500.ch50

Author Information

  1. 1

    University of Illinois at Urbana-Champaign, Urbana, EL 61801

  2. 2

    Oak Ridge National Laboratory, Oak Ridge, TN 37831

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375327

Online ISBN: 9780470314500

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Keywords:

  • fiber-matrix;
  • PAN-based;
  • C-nicalon;
  • debonding;
  • toughness

Summary

Micro-indentation push-in and push-out techniques were used to evaluate the mechanical character of the fiber-matrix interface in boron nitride matrix composites derived from borazine oligomers. Specimens containing various ceramic fibers (including Nicalon™, carbon coated Nicalon™, PAN-based carbon, and pitch-based carbon) were examined. Fiber sliding was observed with the carbon coated Nicalon fibers (C-Nicalon). For this composite system, the debonding strength, residual axial fiber stress and interfacial friction stress were determined. Auger Electron Spectroscopy was used to compare the interfacial chemistry in the Nicalon and C-Nicalon systems. The carbon fiber/boron nitride matrix composites exhibited superior strengths to the Nicalon and carbon coated Nicalon composites. However, the preliminary micro-indentation analysis did not provide any basis for distinguishing this behavior.