Diffusion Mechanisms

This lecture covers the mechanisms of diffusion in crystalline solids, including simple, lacunar, and interstitial mechanisms. It explores the structures of cubic and non-cubic crystals, as well as the effects of temperature, pressure, and empirical correlations on diffusion. The presentation delves into the fick equations, Nernst-Einstein equation, and transport forces, providing insights into gases, liquids, and solids. Additionally, it discusses self-diffusion in metals, diffusion in compound alloys, and heterodiffusion in diluted alloys and binary alloys.