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Diffusion in Al-Cu Melts Studied by Time-Resolved X-Ray Radiography

Zhang, B. and Griesche, A. and Meyer, A. (2010) Diffusion in Al-Cu Melts Studied by Time-Resolved X-Ray Radiography. Physical Review Letters, 104, 035902. DOI: 10.1103/PhysRevLett.104.035902.

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Abstract

We use time-resolved x-ray radiography in order to monitor interdiffusion processes in situ in liquid alloys. We measure temperature and composition dependent interdiffusion coefficients (DAlCu) in Al-rich Al-Cu melts. At constant temperature, DAlCu only exhibits a weak dependence of the alloy composition. As compared to self-diffusion, interdiffusion is enhanced by a factor of about 3. Our results demonstrate that it is not possible to express interdiffusion in terms of self-diffusion and thermodynamic driving forces.

Document Type:Article
Title:Diffusion in Al-Cu Melts Studied by Time-Resolved X-Ray Radiography
Authors:
AuthorsInstitution or Email of Authors
Zhang, B.Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany
Griesche, A.Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany
Meyer, A.Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany
Date:22 January 2010
Journal or Publication Title:Physical Review Letters
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:104
DOI:10.1103/PhysRevLett.104.035902
Page Range:035902
Status:Published
Keywords:PACS numbers: 66.10.cg, 61.25.Mv, 65.20.-w
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Prof.Dr. Andreas Meyer
Deposited On:27 Jan 2010 09:11
Last Modified:07 Feb 2013 20:39

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