Diffusion in Alloys: Phases and Interfaces

This lecture covers the diffusion phenomena in compound alloys, including dilute alloys, binary alloys, and phase separation. It explores topics such as chemical diffusion, diffusion in ionic crystals, and the formation of different phases in binary alloys. The lecture delves into the mechanisms of phase separation, including germination of new phases and spinodal decomposition. It also discusses the stability of two-phase systems compared to single-phase systems, as well as the role of interfaces in diffusion processes. The presentation concludes with a detailed examination of dislocation movements, shear stresses, and the impact of thermal energy on diffusion at interfaces.