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- Title
Liquid Phase Sintering of Alumina, III. Effect of Trapped Gases in Pores on Densification.
- Authors
Weimin Dong; Himanshu Jain; Martin P. Harmer
- Abstract
The microstructure evolution and densification kinetics of alumina containing 10 and 20 vol% calcium aluminosilicate glass were studied, for sintering under vacuum and air at 1600°C. Residual porosity was always present in the air-fired samples. The kinetic analysis lent strong support to the notion that trapped gases inhibited the densification and limited the attainment of full density. The samples containing 20 vol% glass were able to reach full density during vacuum sintering. However, the samples containing 10 vol% glass contained some residual porosity even after vacuum sintering, which was attributed to the preferential volatalization of liquid phase.
- Subjects
ALUMINUM oxide; SINTERING; MICROSTRUCTURE; CONSTITUTION of matter; POROSITY; ADSORPTION (Chemistry)
- Publication
Journal of the American Ceramic Society, 2005, Vol 88, Issue 7, p1714
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2005.00149.x