It was shown that diffusional phenomena which were related to ionic hyper-conductivity along crystallite interfaces in polycrystals could be studied by means of the isochronal annealing of a single specimen. Ionic hyper-conductivity along crystallite interfaces in polycrystalline monatomic metals was described within the Goldshtein-Fisher model; as modified to take account of the presence of a so-called pump-out zone in the region of crystallites that were adjacent to the interfaces. The occupancies of states in the region of ionic hyperconductivity, of monatomic metals such as Pt and W, were studied experimentally as a function of the diffusion annealing temperature.

S.M.Klotsman, M.I.Kurkin, V.N.Kalgorodov, V.V.Dyakin: Physics of Metals and Metallography, 1996, 82[4], 419-26