The hole theory of diffusion

摘要: We show that in a dilute substitutional solid solution of one metal another the diffusion solute atoms is determined by compound activation energy A + ABA where necessary for formation hole next to dissolved atom and make jump round atom, provided - BB >> kT, diffuse away from atom. This mechanism provides an explanation cases foreign lattice has lower than self-diffusion same lattice, gold lead being conspicuous example. However, assumption next-neighbour interactions made description this paper does not correspond facts metallic structure. The statistical argument invalidated this, but calculation actual energies involved becomes very difficult problem quantum mechanics which yet been solved.