Dislocation arrays produced in germanium by room-temperature deformation

Abstract

A metallographic study has established that dislocation arrays can be produced in germanium single crystals by local impact at room temperature. The arrays appear as extensions to true cracks and have the same morphology; neither lie in {111} planes but on curved surfaces determined primarily by the stress field. The evidence suggests that the dislocations exist in the form of large loops. The origin of the dislocation arrays is discussed.