👉 Vacancy fluid refers to the movement of atoms within a crystalline solid where some atoms, known as vacancies, are missing from their lattice sites. In materials science, this phenomenon occurs when atoms in a solid structure have enough thermal energy to break free from their fixed positions, creating vacancies. These vacancies can then diffuse through the crystal lattice, allowing atoms to migrate from one site to another. This process is crucial in various physical and chemical properties of materials, such as diffusion rates, mechanical strength, and electrical conductivity. Vacancy fluidity is particularly significant in metals and semiconductors, influencing their behavior under different conditions like temperature changes or applied stresses.
