The Influence of Sintering Process on the Microstructure of Submicron Alumina Fabricated by Gelcasting

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Using ultra-fine alumina powders as raw materials, the submicron transparent alumina with relative density more than 99.9% was fabricated by gelcasting and then sintering-HIP process. It was found that only the samples with relative density more than 95% after presintering could obtain fully densification by post-HIP treatment. The final grain sizes increased after post-HIP treatment and were decided by either HIPing temperature or presintering temperature, depending on which one is higher. The maximal strength can reach about 650MPa when grain size is about 1 μm.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1185-1187

DOI:

10.4028/www.scientific.net/KEM.336-338.1185

Citation:

L. H. Qi et al., "The Influence of Sintering Process on the Microstructure of Submicron Alumina Fabricated by Gelcasting", Key Engineering Materials, Vols. 336-338, pp. 1185-1187, 2007

Online since:

April 2007

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$35.00

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