Dresden 2011 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MM: Fachverband Metall- und Materialphysik

MM 19: Transport

MM 19.5: Talk

Tuesday, March 15, 2011, 15:00–15:15, IFW D

(contribution withdrawn) Recent advances in grain boundary diffusion studies — •Sergiy Divinski — Institute of Materials Physics, University of Münster

A short overview of a recent progress in experimental investigation of grain boundary diffusion and segregation phenomena is presented. The talk is focused on solute diffusion in bi- and tri-crystals. Using the radiotracer technique in combination with serial sectioning and applying precisely characterized bicrystals, the grain boundary diffusion was for the first time measured at low temperatures under the C kinetic conditions [1] after common Harrison’s classification. The anisotropy of the grain boundary diffusion coefficient, D_gb, and that of the triple product P, P=s · δ· D_gb, was measured for Ag diffusion in Cu near Σ 5 grain boundary. The data are discussed in relation to the grain boundary structure.
The first measurements of Ag diffusion along a triple line in tri-crystal [2] are presented and discussed with respect to the triple line energy.
1. H. Edelhoff, S.I. Prokofjev, S.V. Divinski, Scr. Mater. (2010) doi: 10.1016 j.scriptamat.2010.10.032
2. S.V. Divinski, H. Edelhoff, G. Gottstein, L.S. Shvindlerman, B. Zhao, to be published.