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Influence of cross correlations on interdiffusion in Al-rich Al-Ni melts

Sondermann, Elke and Kargl, Florian and Meyer, Andreas (2016) Influence of cross correlations on interdiffusion in Al-rich Al-Ni melts. Physical Review B, 93 (18), p. 184201. American Physical Society. DOI: 10.1103/PhysRevB.93.184201 ISSN 1098-0121

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Official URL: http://link.aps.org/doi/10.1103/PhysRevB.93.184201

Abstract

The relation of self- and interdiffusion in a liquid metal, particularly the influence of cross correlations at low concentrations, is studied experimentally. Accurate interdiffusion data are obtained by a combination of x-ray radiography with the shear-cell method on the ground and on the sounding rocket MAPHEUS under microgravity conditions. Self-diffusion coefficients, measured by quasielastic neutron scattering, increase with decreasing Ni concentration, whereas interdiffusion coefficients are about constant. We show that cross correlations influence interdiffusion even at concentrations as low as 2 at. % Ni. Consequently, Darken's equation is not valid in this case.

Item URL in elib:https://elib.dlr.de/105343/
Document Type:Article
Title:Influence of cross correlations on interdiffusion in Al-rich Al-Ni melts
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sondermann, Elkeelke.sondermann (at) dlr.dehttps://orcid.org/0000-0001-5935-8945
Kargl, FlorianFlorian.Kargl (at) dlr.deUNSPECIFIED
Meyer, AndreasAndreas.Meyer (at) dlr.deUNSPECIFIED
Date:6 May 2016
Journal or Publication Title:Physical Review B
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:93
DOI :10.1103/PhysRevB.93.184201
Page Range:p. 184201
Publisher:American Physical Society
ISSN:1098-0121
Status:Published
Keywords:Diffusion, liquid metal, microgravity, Al-Ni, metallische Schmelze, Schwerelosigkeit,
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialforschung und Mikrogravitation (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Sondermann, Elke
Deposited On:01 Aug 2016 08:25
Last Modified:06 Sep 2019 15:29

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