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:

Authors	Institution 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:

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 08:11

Last Modified:

07 Feb 2013 19:39

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