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Effect of MgO Solute on the Kinetics of Grain Growth in A1 2 O 3
Author(s) -
Bennison Stephen J.,
Harmer Martin P.
Publication year - 1983
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1983.tb10065.x
Subject(s) - sintering , kinetics , grain growth , grain boundary , microstructure , materials science , magnesium , chemical engineering , mineralogy , calcium , metallurgy , chemistry , physics , quantum mechanics , engineering
The kinetics of grain growth in fully dense Al 2 O 3 with and without MgO solute additions were measured. The MgO was found to retard boundary migration and to rkvelop more uniform microstructures. A grain‐growth mechanism involving solute partitioning of segregated ions (calcium and magnesium) between different boundary types is proposed. Implications regarding the sintering of Al 2 O 3 are discussed.