Direct Observations of the Arrangement of Atoms around Stacking Faults and Twins in Gold Crystals and the Movement of Atoms Accompanying Their Formation and Disappearance

Abstract

Two types of imaging methods in high resolution transmission electron microscopy, which give the images of atoms at the atomic positions in crystals containing defects, are presented. Using one of the methods, atomic arrangements of partial dislocations, intrinsic and extrinsic stacking faults, sessile dislocations formed by the interaction of two partial dislocations, and coherent and incoherent twin boundaries in gold thin crystals have been observed. Dynamic observations using TV systems have been carried out on the movement of atoms accompanying the formation, the movement and disappearance of stacking faults and twins, and their interaction.