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

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.

• Periodical: Defect and Diffusion Forum (Volume 264)
• Pages: 55-62
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.264.55
• Online since: April 2007
• Authors: S.I. Prokofjev, V.M. Zhilin, E. Johnson, U. Dahmen
• Keywords: Aluminum Matrix, Diffusion Coefficient, Dislocation, Liquid Lead Inclusions, Microscopic Mechanism, Roughening Transformation, TEM, Thermal Motion

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