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Anisotropy of Grain Growth in Alumina

Rödel, Jürgen and Glaeser, Andreas M. (1990):
Anisotropy of Grain Growth in Alumina.
In: Journal of the American Ceramic Society, pp. 3292-3301, 73, (11), ISSN 0002-7820,
[Online-Edition: http://dx.doi.org/10.1111/j.1151-2916.1990.tb06452.x],
[Article]

Abstract

Grain growth in theoretically dense undoped and MgO-doped polycrystalline Al2O3 was studied, and average grain-boundary migration rates were compared with those of a-plane and c-plane sapphire during migration into the same undoped and MgO-doped materials. The results are discussed in terms of a grain-size-dependent grain-boundary mobility-grain-boundary energy product, Mbγb. The grainsize dependencies of the Mbγb products for seed and matrix grains differ. Seed orientation appears to affect the nature of solute-boundary interactions. The importance of grain-boundary structure on migration characteristics is also indicated by a demonstration of twin-formation-enhanced grain growth.

Item Type: Article
Erschienen: 1990
Creators: Rödel, Jürgen and Glaeser, Andreas M.
Title: Anisotropy of Grain Growth in Alumina
Language: English
Abstract:

Grain growth in theoretically dense undoped and MgO-doped polycrystalline Al2O3 was studied, and average grain-boundary migration rates were compared with those of a-plane and c-plane sapphire during migration into the same undoped and MgO-doped materials. The results are discussed in terms of a grain-size-dependent grain-boundary mobility-grain-boundary energy product, Mbγb. The grainsize dependencies of the Mbγb products for seed and matrix grains differ. Seed orientation appears to affect the nature of solute-boundary interactions. The importance of grain-boundary structure on migration characteristics is also indicated by a demonstration of twin-formation-enhanced grain growth.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 73
Number: 11
Uncontrolled Keywords: alumina; sapphire; grain growth; grain boundary; anisotropy
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 13 Jun 2012 12:07
Official URL: http://dx.doi.org/10.1111/j.1151-2916.1990.tb06452.x
Identification Number: doi:10.1111/j.1151-2916.1990.tb06452.x
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