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Effect of Morphology on the Mobility of Nanosized Liquid Pb Inclusions in Solid Al

Journal Defect and Diffusion Forum (Volume 264)
Volume Diffusion and Stresses
Edited by D. L. Beke, Z. Erdélyi and I. A. Szabó
Pages 55-62
DOI 10.4028/www.scientific.net/DDF.264.55
Citation S.I. Prokofjev et al., 2007, Defect and Diffusion Forum, 264, 55
Online since April, 2007
Authors S.I. Prokofjev, V.M. Zhilin, E. Johnson, U. Dahmen
Keywords Aluminium Matrix, Diffusion Coefficient, Dislocations, Liquid Lead Inclusions, Microscopic Mechanism, Roughening Transformation, TEM, Thermal Motion
Abstract

Diffusion of nanosized liquid Pb inclusions attached to dislocations in thin aluminum foils was investigated in a wide temperature range using in-situ transmission electron microscopy. Trajectories of motion of the inclusions along the dislocations were used to determine their diffusion coefficients. The temperature and size dependences of diffusion coefficients of the inclusions were obtained. They indicate that (i) studied inclusions hold {111} facets on their surface in the studied temperature range; (ii) the mobility of the inclusions is controlled by step nucleation at the {111} facets.

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