Misfit dislocations at metal-oxide interfaces

As a tribute to the Golden Jubilee of the Indian Institute of Metals this paper reports on investigations of Ag-ZnO interfaces, produced by internal oxidation of an Ag-Zn alloy. ZnO precipitates with the wurtzite structure were found showing mainly one orientation relationship with the AE matrix. However, closely related OR's wars found, rotated by small angles from that orientation relation. The atomic structure of several interfaces surrounding these precipitates was studied and compared using HRTEM. The paper focuses on interfaces between low index facets of ZnO and vicinal planes of Ag. These interfaces clearly show relaxations. An interpretation of these relaxations in terms of dissociation of partial dislocations at the interface is put forward.