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Silver grain boundary diffusion in Pd |
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| Authors: | Z Balogh Z Erdélyi A Portavoce C Girardeaux J Bernardini A Rolland |
| Institution: | a Department of Solid State Physics, University of Debrecen, P.O. Box 2, H-4010 Debrecen, Hungary b Aix-Marseille Université, IM2NP, Faculté des Sciences et Techniques, Campus de Saint-Jérôme, Avenue Escadrille Normandie Niemen - Case 142, F-13397 Marseille Cedex, France c CNRS, IM2NP (UMR 6242), Faculté des Sciences et Techniques, Campus de Saint-Jérôme, Avenue Escadrille Normandie Niemen - Case 142, F-13397 Marseille Cedex, France |
| Abstract: | Two to ten nanometer thick polycrystalline Pd films were prepared on the (1 1 1) surface of Ag single crystal and investigations of the Ag diffusion along Pd grain boundaries were carried out using the Hwang-Balluffi method. The samples were monitored by Auger electron spectroscopy (AES) during isothermal heat treatments in the 438-563 K temperature range. Using plausible simplifying assumptions, the activation energy of the product of the grain boundary (GB) diffusion coefficient and k′ (k′ = cs/cgb; cs and cgb are the surface and GB concentration, respectively) was calculated (0.99 ± 0.08 eV) from the evaluated saturation coefficients of the surface accumulation. This energy, for weak temperature dependence of k′, is approximately equal to the activation energy of the GB diffusion. |
| Keywords: | 66 10C 61 72Mn 82 80Pv |
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