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Exuding Liquid from Grain Boundaries in Alumina
Author(s) -
Ravishankar N.,
Carter C. Barry
Publication year - 2001
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.1151-2916.2001.tb00752.x
Subject(s) - wetting , intergranular corrosion , grain boundary , anorthite , materials science , annealing (glass) , metallurgy , composite material , mineralogy , microstructure , geology
Bicrystals of alumina with anorthite glass in the boundary were prepared by hot pressing. Annealing of the bicrystals leads to the migration of the intergranular liquid to the free surface of the sample. It is proposed that the migration is driven by the difference in the wetting behavior of the free surface and the boundary.