Chapter 9. ICP Sintering of Attrition-Milled Al2O3 — 5wt% Al Precursor: Effect of Power Input and Gas Pressure

  1. John B. Wachtman Jr.
  1. Seung H. Kim1 and
  2. Shome N. Sinha2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314555.ch9

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

How to Cite

Kim, S. H. and Sinha, S. N. (1994) ICP Sintering of Attrition-Milled Al2O3 — 5wt% Al Precursor: Effect of Power Input and Gas Pressure, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314555.ch9

Author Information

  1. 1

    Indiana-Purdue University Fort Wayne, IN 46805

  2. 2

    The University of Illinois at Chicago, Chicago, IL 60607-7023

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375334

Online ISBN: 9780470314555

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Keywords:

  • advanced synthesis and processing;
  • powder synthesis and consolidation;
  • inductively coupled plasma sintering behavior;
  • high energy milling;
  • r-curve behavior

Summary

Inductively coupled plasma (ICP) sintering behavior of Al2O3-5 wt% Al composite powder synthesized by high energy milling were investigated. The voltage input to r.f. coils and pressure in argon plasma were varied between 5–8 kV and 60 Pa or 160 Pa pressure, respectively. At 8 kV-input, more than 99% dense compacts were obtained. At a given voltage input, the average grain size (1.24 m) of the compact sintered at 60 Pa was smaller than that at 160 Pa (2.12 m). At a lower voltage input (5 kV) and 60 Pa or 160 Pa pressure, the microstructures of the compacts contained sintered and unsintered regions and the average sizes of alumina grains were 0.32 m and 0.48 m, respectively. The microstructural features were analyzed to study the sintering behavior.