A review of recent progress in grain boundary diffusion studies was presented. The emphasis was placed upon the physical phenomena encountered in grain boundary diffusion experiments, such as linear and non-linear segregation effects. Systematic investigations of pure and alloyed polycrystals and bicrystals furnished conclusive information on the solute segregation behavior and permitted the deduction of segregation isotherms simply from grain boundary diffusion studies. Recent progress in the fundamental understanding of diffusion processes in 2-scale materials with 2 types of short-circuit diffusion path was considered on the basis of grain boundary self-diffusion experiments and Monte Carlo simulations of powder sintered nanocrystalline material.

Grain Boundary Diffusion in Metals - Recent Developments. C.Herzig, S.V.Divinski: Materials Transactions, 2003, 44[1], 14-27