Grain Boundaries in Sodium Chloride
Single crystals of optical-grade sodium chloride were joined to produce bicrystals and tricrystals of controlled orientation. The dislocation and small-angle grain boundary configurations of the melt zone were determined. The relative energy of different grain boundary orientations was estimated. The local strain was estimated by etch pit and optical birefringence techniques. Etch pit and electron microscopic determinations were used to study dislocation interaction with grain boundaries.
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