Abstract

Abstract The structures of a series of tilt grain boundaries in germanium bicrystals and the interaction of deformation-induced lattice dislocations with these boundaries have been studied using transmission electron microscopy. High-resolution techniques were used to determine the Burgers vectors of the secondary dislocations. The bicrystals were grown from the melt using the Czochralski method to produce the low-Σ grain boundaries: Σ = 11, 33, 41 and 51. The Burgers vector of the secondary dislocations was usually not the primitive Burgers vector which might have been expected by applying O-lattice analysis. This interpretation is consistent with the Burgers vectors determined for secondary dislocations produced by lattice dislocations dissociating on entering the grain boundaries.

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