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Influence of initial crystal structure and electrical pulsing on densification of nanocrystalline alumina powder

Published online by Cambridge University Press:  31 January 2011

R. S. Mishra ,
S. H. Risbud  and
A. K. Mukherjee
R. S. Mishra
Affiliation:
Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
S. H. Risbud
Affiliation:
Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
A. K. Mukherjee
Affiliation:
Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
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Extract

The effect of the crystal structure of starting alumina powder and electric pulsing on the initial stages of densification has been studied in the temperature range of 1200– 1500 °C. Multiple electric pulsing cycles enhance the densification significantly. The α-alumina powders consolidate more readily in comparison to γ-alumina powders. A high density α-alumina specimen (>98% of theoretical density) was obtained at 1300 °C in less than 10 min.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 1 , January 1998 , pp. 86 - 89
Copyright
Copyright © Materials Research Society 1998

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