Chapter 17. Evaluation of the Interfacial Mechanical Properties in Fiber-Reinforced Ceramic Composites

  1. John B. Wachtman Jr.
  1. M. K. Ferber1,
  2. A. A. Wereszczak1,
  3. L. Riester1,
  4. R. A. Lowden1 and
  5. K. K. Chawla2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314180.ch17

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

How to Cite

Ferber, M. K., Wereszczak, A. A., Riester, L., Lowden, R. A. and Chawla, K. K. (2008) Evaluation of the Interfacial Mechanical Properties in Fiber-Reinforced Ceramic Composites, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314180.ch17

Author Information

  1. 1

    Oak Ridge National Laboratory, Oak Ridge, TN 37831

  2. 2

    New Mexico Tech., Socorro, NM 87801

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375266

Online ISBN: 9780470314180

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Keywords:

  • monolithic;
  • macroscopic;
  • mathematical;
  • ceramographic;
  • polynomial

Summary

The present study examined the application of a micro-indentation technique to the measurement of interfacial mechanical properties in fiber reinforced ceramic composites. Specific fiber/matrix systems included SiC/glass, SiC/macro-defect-free (MDF) cement, SiC/SiC, and mullite/glass. The effect of fiber coatings upon the interfacial properties was also investigated. These properties, which included the debond strength, interfacial shear stress, and residual axial fiber stress, were evaluated by measuring the force-displacement curves generated during load-unload cycles. Estimates of these three stress values were obtained by matching the experimental force-displacement curves with data predicted from an existing model.

In general the SiC/glass composites exhibited the lowest values of the interfacial shear and debond stresses. The sliding characteristics of the SiC/MDF cement and SiC/SiC composites were strongly influenced by the residual axial stress and the nature of the fiber coating. In the case of the mullite/glass composite, the high values of the interfacial shear and debond stresses reduced the measurement sensitivity, thereby increasing the uncertainty in the estimates of the interfacial properties.