The pressure dependence of grain-boundary diffusion of ⁶⁵Zn in polycrystalline aluminium

G. Erdélyi Institute of Physics, Department of Solid State Physics, L. Kossuth University, H-4010, Debrecen, Hungary

W. Łojkowski Institute of Physics, Department of Solid State Physics, L. Kossuth University, H-4010, Debrecen, Hungary; Unipress—High Pressure Research Centre, Sokolowska 29, 01-142, Warsaw, Poland

D. L. Beke Institute of Physics, Department of Solid State Physics, L. Kossuth University, H-4010, Debrecen, Hungary

I. Gödény Institute of Physics, Department of Solid State Physics, L. Kossuth University, H-4010, Debrecen, Hungary

F. J. Kedeves Institute of Physics, Department of Solid State Physics, L. Kossuth University, H-4010, Debrecen, Hungary

Abstract

The pressure dependence of the grain-boundary diffusion of ⁶⁵Zn in polycrystalline aluminium has been measured in the B-kinetic regime at 593 K in the pressure range 0–1·2 GPa. Separating the subgrain and large-angle grain-boundary segments of the penetration plots, it has been found that the activation volumes are (0·86 ± 0·06)Ω and (0·80 ± 0·10)Ω respectively (Ω is the atomic volume). These results are consistent with the vacancy mechanism of grain boundary diffusion

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The pressure dependence of grain-boundary diffusion of ⁶⁵Zn in polycrystalline aluminium

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The pressure dependence of grain-boundary diffusion of ⁶⁵Zn in polycrystalline aluminium