Structure of Interfaces in Solids,and the Influence of this Structure on Adhesion and Friction and Wear.

摘要

The work investigated the structure of grain boundaries and interfaces using a smoke technique developed earlier by us. It also investigated the formation of misfit dislocations and showed that under certain conditions the formation of screw dislocations is favored over edge dislocations. A detailed investigation of the formation of interface dislocations in garnets was carried out. The garnets are good magnetic bubble materials. The process of wear and friction was investigated in thin films. The deformation process was characterized using electron microscopy and a variety of new results in this old field were obtained. A combination of interface sliding and accommodating relaxation mechanisms was involved to explain the phenomena of superplasticity. Magnetic bubbles were used to stimulate atomic arrangement in two dimensional lattices and the structure of grain boundaries and amorphous material was investigated with this technique. This technique also provided a unique method of measuring domain wall velocities. (Author)