Chapter 29. Residual Microstrains in Whisker-Reinforced Alumina

  1. John B. Wachtman Jr.
  1. S. Bar-Ziv1 and
  2. D. G. Brandon2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470310496.ch29

Proceedings of the 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 7/8

Proceedings of the 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 7/8

How to Cite

Bar-Ziv, S. and Brandon, D. G. (1988) Residual Microstrains in Whisker-Reinforced Alumina, in Proceedings of the 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310496.ch29

Author Information

  1. 1

    Rafael, A. D. A. POB 2250, Haifa, Israel

  2. 2

    Department of Materials Engineering Technion, Israel Institute of Technology Haifa 32000, Israel

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780470374801

Online ISBN: 9780470310496

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Keywords:

  • volatile;
  • characterization;
  • fiber-matrix;
  • oxidation;
  • thermal expansion

Summary

The magnitude of the internal stresses in whisker-reinforced ceramic matrix composites can be estimated from X-ray diffraction peak shift measurements. In alumina matrix composites these stresses have been modeled by assuming that both the matrix and the reinforcing phase are continuous. Lattice strains were measured by two distinct procedures. In the first, accurate values for the volume of the unit cell were calculated; in the second. the strains were measured for specific lattice directions. The data are primarily from the α-Al2O3 matrix phase, but some results are also available from the β-SiC whisker reinforcement. The dominant stresses are no deviatory and were found to depend strongly on the composition and heat treatment schedule of the composite.