Atomic diffusion

Atomic diffusion refers to the process by which atoms or molecules move from regions of higher concentration to regions of lower concentration within a material. This movement can occur in various phases, such as solids, liquids, and gases, and it is a fundamental mechanism that influences numerous physical and chemical processes. In the context of solid materials, atomic diffusion can occur due to thermal vibrations of atoms within a lattice structure, allowing them to hop from one lattice site to another.