Chapter 17. Properties of Pressureless Sintered Alumina Matrix Composites Containing up to 30 Vol% SiC Whiskers

  1. John B. Wachtman Jr.
  1. Curtis W. Griffin,
  2. Andrew C. Hurford,
  3. Anil V. Virkar and
  4. David W. Richerson

Published Online: 26 MAR 2008

DOI: 10.1002/9780470310557.ch17

A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 7/8

A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 7/8

How to Cite

Griffin, C. W., Hurford, A. C., Virkar, A. V. and Richerson, D. W. (1989) Properties of Pressureless Sintered Alumina Matrix Composites Containing up to 30 Vol% SiC Whiskers, in A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310557.ch17

Author Information

  1. Ceramatec, Inc. Salt Lake City, UT

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780470374863

Online ISBN: 9780470310557

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Keywords:

  • whiskers;
  • theoretical density;
  • carrier fluids;
  • dispersants;
  • chemical vapor infiltration

Summary

A process has been developed to fabricate dense alumina matrix composites containing up to 30 vol% SiC whiskers by pressureless sintering. Subsequent hot isostatic pressing increased the density of some composites to nearly 100% TD with a concurrent increase in strength due to a reduction in flaw size. These pressureless sinter/HIP'd composites have flexure strengths in excess of 530 MPa and fracture toughness greater than 7 MPa β m1/2. The fabrication procedure and properties will be described for composites containing 5-30 vol% SiC whiskers. Properties examined include flexure strength, fracture toughness, hardness, Weibull modulus, and erosion resistance.