Effect of Liquid Content on the Abnormal Grain Growth of Alumina
- 1 July 2001
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 84 (7) , 1597-1600
- https://doi.org/10.1111/j.1151-2916.2001.tb00883.x
Abstract
Alumina specimens with small amounts of CaO and TiO2 were prepared and their microstructural evolution during sintering was investigated. Because of the appearance of a liquid phase during sintering, a duplex microstructure of a few abnormal grains and fine matrix grains was obtained when the CaO + TiO2 content was small (≤0.04 wt%). When the CaO + TiO2 content was relatively high (≥0.1 wt%), many grains grew and impinged upon each other. As a result, a rather uniform and homogeneous microstructure was observed.Keywords
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