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MM: Fachverband Metall- und Materialphysik

MM 5: Transport and Diffusion I

MM 5.1: Vortrag

Montag, 26. März 2012, 10:15–10:30, H 1029

Investigation of Fe diffusion in Cu by Energy Dispersive X-ray Analysis — •Daria Prokoshkina^1,2, Alexey Rodin², and Vladimir Esin^2,3 — ¹Institute for Materials Physics, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Deutschland — ²Department of Physical-Chemistry, National University of Science and Technology "MISiS", Moscow, Russia — ³"Département Science et Ingénierie des Matériaux et Métallurgie", Institut Jean Lamour - UMR 7198 - CNRS - Nancy-Université - UPV-Metz, Nancy, France

Iron diffusion in copper is of particular interest since anomalies of iron grain boundary (GB) diffusion in copper have been observed recently. Bernardini et al. [1] investigated Fe GB diffusion in Cu at 716 K after annealing during 96 hours in the B-regime, whereas in the work of Ribbe et al. [2] diffusion annealing at 719 K during 20 hours corresponded to the C-regime. Moreover, a strong curvature of the concentration profiles in Fisher's coordinates was observed by both research groups. In the described works the radiotracer technique was applied. The reasons of the observed anomalies remain unknown. To clarify the problem, another method is used in this work: Energy Dispersive X-ray analysis. GB diffusion measurements are performed in the temperature range from 823 to 1073 K. The parameters of the bulk diffusion of Fe in Cu in the temperature range from 923 to 1273 K are also evaluated. The complex approach of investigating Fe GB diffusion in Cu did not permit to observe fast GB diffusion in the temperature range from 823 to 1073 K. [1] J. Bernardini et al. Def. and Diff. Forum. 249(2006)161. [2] Jens Ribbe et al. Def. and Diff. Forum. 289-292(2009)211.