Chapter 44. Microwave Sintering of Al2O3 and Al2O3-SiC Whisker Composites

  1. William Smothers
  1. T. T. Meek,
  2. R. D. Blake and
  3. J. J. Petrovic

Published Online: 26 MAR 2008

DOI: 10.1002/9780470320402.ch44

11th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 8, Issue 7/8

11th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 8, Issue 7/8

How to Cite

Meek, T. T., Blake, R. D. and Petrovic, J. J. (1987) Microwave Sintering of Al2O3 and Al2O3-SiC Whisker Composites, in 11th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 8, Issue 7/8 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320402.ch44

Author Information

  1. Materials Science and Technology Div. Los Alamos National Laboratory Los Alamos, NM 87545

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1987

ISBN Information

Print ISBN: 9780470374733

Online ISBN: 9780470320402

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Keywords:

  • sic whisker-Al2O3;
  • ion migration losses;
  • ionic vibration losses;
  • electronic polarization losses;
  • temperature and impurities

Summary

Alumina-based ceramics can be rapidly heated to high temperatures using microwave radiation. Initial investigations have been performed on the microwave sintering of Al2O3 and Al2O3-SiC whisker ceramic composites at 60 GHz. High purity, submicron Al2O3 powders were observed to sinter from an initial green density of 50% to a sintered density of 96%, when specimens were microwave heated at 60 GHz from room temperature of 1700°C in 370s. SiC whisker-Al2O3 matrix ceramic composites containing 10 vol% whiskers were sintered for 52% initial density to 77% sintered density, by microwave heating at 60 GHz from room temperature to 1450°C in 320 s.