Chapter 25. Physical Properties of Alumina-Boron Carbide Whisker/Particle Composites

  1. John B. Wachtman Jr
  1. Jenq Liu and
  2. P. Darrell Ownby

Published Online: 28 MAR 2008

DOI: 10.1002/9780470313831.ch25

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

How to Cite

Liu, J. and Ownby, P. D. (1991) Physical Properties of Alumina-Boron Carbide Whisker/Particle Composites, in Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313831.ch25

Author Information

  1. Ceramic Engineering Department University of Missouri-Rolla Rolla, MO 65401

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1991

ISBN Information

Print ISBN: 9780470375099

Online ISBN: 9780470313831

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Keywords:

  • alumina;
  • isotropic;
  • carbide;
  • methanol;
  • microstructure

Summary

The alumina-boron carbide composites were prepared by sintering and hot pressing. The mechanical properties of hot pressed alumina-boron carbide composites are better than the inherent alumina matrix. A maximum fracture toughness, KIC, of 7.26 MPa·m1/2 is achieved for alumina-boron carbide whisker composites as is a 47% increase in flexural strength. The fracture toughness is dependent on the volume fraction of boron carbide. The lower thermal expansion coefficient of the composites as a function of boron carbide whisker content is shown.