Chapter 19. Pressureless Sintering of Al2O3/SiC Whisker Composites

  1. John B. Wachtman Jr.
  1. Hae-Weon Lee and
  2. Michael D. Sacks

Published Online: 26 MAR 2008

DOI: 10.1002/9780470310557.ch19

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

Lee, H.-W. and Sacks, M. D. (1989) Pressureless Sintering of Al2O3/SiC Whisker Composites, 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.ch19

Author Information

  1. Department of Materials Science and Engineering University of Florida Gainesville, FL

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:

  • ultrasonication;
  • chemical vapor infiltration;
  • densification;
  • polelectrolyte dispersants;
  • whisker concentrations

Summary

Al2O3SiC whisker compacts with high packing density, fine pore sizes, and homogeneous green microstructure were formed by suspension processing. The effects of Al2O3 powder surface area, Y2O3/MgO sintering aids, and green compact infiltration on pressureless sintering behavior were investigated. With optimum processing conditions, samples with 15 vol% whiskers could be sintered to ≈97% relative density (and no open porosity), while samples with 27 vol% whiskers could be sintered to ≈ 93% relative density (and ≈3% open porosity).