Stand-off dislocations at a twist grain boundary in gold as seen via high-resolution transmission electron microscopy

摘要

The present study applies high-resolution transmission electron microscopy jwith a combination of geometric phase analysis to characterize atomic structures of a twist grain boundary in gold, illuminating the presence of misfit dislocations with a stand-off distance from the grain boundary. The formation of the stand-off misfit dislocations is attributed to a difference in shear modulus between the two grains bordering the grain boundary, which originates in elastic anisotropy of Au.