Chapter 51. Porosity Dependence of Wear and Other Mechanical Properties on Fine-Grain A12O3 and B4C

  1. William Smothers
  1. C. Cm. Wu and
  2. R. W. Rice

Published Online: 26 MAR 2008

DOI: 10.1002/9780470320280.ch51

Proceedings of the 9th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 6, Issue 7/8

Proceedings of the 9th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 6, Issue 7/8

How to Cite

Wu, C. Cm. and Rice, R. W. (1985) Porosity Dependence of Wear and Other Mechanical Properties on Fine-Grain A12O3 and B4C, in Proceedings of the 9th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 6, Issue 7/8 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320280.ch51

Author Information

  1. Naval Research Lab Washington, DC 20375–5000

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1985

ISBN Information

Print ISBN: 9780470374337

Online ISBN: 9780470320280

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Keywords:

  • porosity;
  • mechanical;
  • flexural strength;
  • fracture toughness;
  • vicker's hardness

Summary

Macro (Taber) wear tests and especially micro (pin-on-disk) tests performed on Al2O3 and B4C, as a function of varying porosity, show wear increasing exponentially with porosity. Al2O3, which was tested over a much more extensive range of porosity, showed a significant change in the porosity dependence of wear at approximately 20% porosity, which is attributed to densiflcation. The same materials used for these wear tests were also used for measurement of Young's modulus, flex-ural strength, fracture toughness, and Vicker's hardness at room temperature, which all show an exponential dependence on porosity as expected. All but hardness show a lower porosity dependence of wear. Reasons for these differences are discussed.