Anisotropy of grain growth in alumina

Conference · Fri Sep 01 04:00:00 EDT 1989

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb06452.x· OSTI ID:7198383

Roedel, J.; Glaeser, A. M.

Grain growth in theoretically dense undoped and MgO-doped polycrystalline alumina was studied and average grain boundary migration rates were compared to 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, M{sub b}{gamma}{sub b}. The grain size dependencies of the M{sub b}{gamma}{sub b} 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. 30 refs., 8 figs., 3 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7198383
• Report Number(s): LBL-27360; CONF-890421--12; ON: DE90009045
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANISOTROPY
CHALCOGENIDES
CORUNDUM
CRYSTAL STRUCTURE
DOPED MATERIALS
GRAIN BOUNDARIES
GRAIN GROWTH
GRAIN SIZE
KINETICS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MICROSTRUCTURE
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SAPPHIRE
SIZE