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Transformations of faceted grain boundaries in high-Tcsuperconductors

A theoretical model is suggested that describes the transformations of faceted low-angle grain boundaries in high-T c superconductors. Conditions are theoretically revealed at which the formation of split dislocation configurations at facet junctions and central parts of facets of low-angle tilt boundaries is energetically favorable. The results of the suggested model account for experimental data reported in the literature on observation of faceted low-angle tilt boundaries consisting of split dislocation configurations in high-T c superconductors.