Interdiffusion and thermodynamic forces in binary liquid alloys

Griesche, A. and Zhang, B. and Horbach, J. and Meyer, A. (2010) Interdiffusion and thermodynamic forces in binary liquid alloys. Materials Science Forum, 649, p. 481. DOI: 141.63.130.86-26/01/10.

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Abstract

A novel X-ray radiography method is used to measure chemical diffusion in a longcapillary in liquid Al95Ni5 at.-%. Molecular dynamics simulations provide interdiffusion coefficients and thermodynamic factors for the whole composition range in Al-Ni. The data are compared to literature data in Sb-Sn and Ag-Sn. The relation between interdiffusion coefficient and thermodynamic forces is discussed in the context of the Darken equation. In systems with common ordering tendency (Al-Ni, Sb-Sn) the thermodynamic factor is larger than one and enhances interdiffusion. In systems with common demixing tendency (Ag-Sn) the thermodynamic factor is smaller than one and reduces interdiffusion.

Document Type:

Article

Title:

Interdiffusion and thermodynamic forces in binary liquid alloys

Authors:

Authors	Institution or Email of Authors
Griesche, A.	Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany
Zhang, B.	Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany
Horbach, J.	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:

January 2010

Journal or Publication Title:

Materials Science Forum

Refereed publication:

Yes

In SCOPUS:

Yes

In ISI Web of Science:

Volume:

649

DOI:

141.63.130.86-26/01/10

Page Range:

p. 481

Status:

Published

Keywords:

Interdiffusion, Self Diffusion, X-ray Radiography, Al-Alloys, Darken Equation

HGF - Research field:

Aeronautics, Space and Transport

HGF - Program:

Space

HGF - Program Themes:

W FR - Forschung unter Weltraumbedingungen

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 08:49

Last Modified:

07 Feb 2013 20:05

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