The diffusion of C along grain boundaries was studied by using radioisotope techniques. Account was taken of the importance of identifying moving grain boundaries in the structures of polycrystals. An attempt was made to reveal them by using high-resolution autoradiography.

Diffusion of Carbon along Grain Boundaries in Niobium. L.B.Vasilenok, E.N.Kablov, B.S.Bokshtein, I.M.Razumovskii: Doklady Physics, 2000, 45[11], 588-91