The effects of crystallography on grain-boundary migration in alumina

摘要

The sintering process of ceramics involves mass transport across grain boundaries resulting in the migration of these boundaries. When there is a liquid at the interface-as in liquid-phase sintering-the mass transport can be enhanced. In this study, electron backscatter diffraction has been used to examine grain-boundary migration of controlled interfaces in alumina. The interfaces were prepared by hot pressing single-crystal and polycrystalline alumina to single-crystal alumina substrates of known orientation. EBSD patterns, taken near the sintered interfaces, have been used to study the effects of crystallography on migration direction and rate. (c) 2006 Springer Science + Business Media, Inc.