Abstract
Bicrystal experiments were carried out, in order to verify the DSC dislocation model of grain boundary sliding. Coupling of sliding and migration was observed in the {1\bar211} coincidence boundary of Zn. The amount of grain boundary migration was measured to be about twice as large as that of grain boundary sliding. The sliding-to-migration ratio as well as the migration direction were in agreement with those predicted by the DSC dislocation model.
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