Chapter 29. Microstructures and Interfaces in Al2O3-5 wt% Al CMC Synthesized by Plasma Sintering of Attrition-Milled Precursors

  1. John B. Wachtman Jr.
  1. S. H. Kim and
  2. Shome N. Sinha

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313978.ch29

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

How to Cite

Kim, S. H. and Sinha, S. N. (1994) Microstructures and Interfaces in Al2O3-5 wt% Al CMC Synthesized by Plasma Sintering of Attrition-Milled Precursors, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313978.ch29

Author Information

  1. University of Illinois at Chicago chicago, IL 60680

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375198

Online ISBN: 9780470313978

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Keywords:

  • spectroscopy;
  • gelcasting;
  • polymerization;
  • intensities;
  • copolymerization

Summary

Microstructure-property-processing relationships are studied for synthesiaed Al2O3-5 wt% Al composites. To obtain a synthetic hierarchical metal reinforcement, a chemically active precursor with about 0.3 μm clusters is made by attrition milling, formed without binder, and rapidly consolidated in an Inductively Coupled Plasma. Sintered composites were more than 97% dense. Microstructures of the composites by SEM and TEM show unusually favorable wetting, no porosity, and evidences of localized, <100 nm wide metal networks. Localized, 5–10 μm wide metal-rich regions consisting of submicron ceramic grains, were also revealed. At 1 kg of load, the average microhardness (VHN) was 416, and crack lengths were 11 · 3 μm.