Chapter 19. Effect of Fracture and Interfacial Debonding of Reinforcing Phase on the Effective Thermal Conductivity of Ceramic Matrix Composites

  1. John B. Wachtman Jr.
  1. Kimberly Y. Donaldson1,
  2. Yangsheng Lu1,
  3. D. P. H. Hasselman1 and
  4. J. R. Thomas Jr.2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314784.ch19

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5

How to Cite

Donaldson, K. Y., Lu, Y., Hasselman, D. P. H. and Thomas, J. R. (1995) Effect of Fracture and Interfacial Debonding of Reinforcing Phase on the Effective Thermal Conductivity of Ceramic Matrix Composites, in Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314784.ch19

Author Information

  1. 1

    Thermophysical Research Laboratory, Department of Materials Science and Engineering

  2. 2

    Department of Mechanical Engineering Virginia Polytechnic Institute and State University Blacksburg, VA 24061-0237 USA

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1995

ISBN Information

Print ISBN: 9780470375389

Online ISBN: 9780470314784

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Keywords:

  • combustion;
  • crystalline;
  • utilization;
  • calorimetrically;
  • scanning electron microscopy (SEM)

Summary

Theoretical expressions are presented for the lower bound on the effective thermal conductivity of fiber- or whisker-reinforced ceramic matrix composites as a function of the percentage of broken fibers or whiskers completely debonded from the matrix. The relative reduction in effective thermal conductivity is significant, especially for fibers or whiskers aligned parallel to heat flow. Without radiative or gaseous interfacial heat transfer, fracture of most or all fibers or whiskers can reduce the composite thermal conductivity to values less than that of the matrix, despite fiber or whisker orientation.