Chapter 22. Tailoring of Reaction-Bonded Al2O3 (RBAO) Ceramics

  1. John B. Wachtman Jr.
  1. N. Claussen,
  2. N. A. Travitzky and
  3. Suxing Wu

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313008.ch22

A Collection of Papers Presented at the 14th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 7/8

A Collection of Papers Presented at the 14th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 7/8

How to Cite

Claussen, N., Travitzky, N. A. and Wu, S. (1990) Tailoring of Reaction-Bonded Al2O3 (RBAO) Ceramics, in A Collection of Papers Presented at the 14th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313008.ch22

Author Information

  1. Technische Universität Hamburg-Hamburg Advanced Ceramics Group D-2100 Hamburg 90, F.R.G.

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1990

ISBN Information

Print ISBN: 9780470374924

Online ISBN: 9780470313008

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Keywords:

  • oxidized;
  • sintered;
  • theoretical density;
  • shape distortion;
  • ceramics

Summary

A novel method of manufacturing strong Al2O3 bodies with low-shrinkage is presented. Isopressed compacts of attrition-milled Al/Al2O3 mixtures with 35 and 50 vol% Al are heat-treated in two steps at 900°–1150°C and 1200°–1450°C, respectively. Fully reaction-bonded (oxidized and sintered) Al2O3 (RBAO) ceramics exhibit a homogeneous distribution of fine (>1 μm) closed pores. The respective strengths are relatively high, e.g., 350 MPa at 93% of theoretical density. Possible mechanisms operating during the reaction-bonding are discussed.