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Self- and interdiffusion in dilute liquid germanium-based alloys

Weis, H. and Kargl, Florian and Kolbe, Matthias and Koza, M.M. and Unruh, T and Meyer, Andreas (2019) Self- and interdiffusion in dilute liquid germanium-based alloys. Journal of Physics - Condensed Matter, 31 (455101). Institute of Physics (IOP) Publishing. doi: 10.1088/1361-648X/ab354e. ISSN 0953-8984.

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Self- and inter-diffusion coefficients in liquid Ge and dilute Ge-based Ge–Si, Ge–Au, Ge–In, Ge–Ce and Ge–Gd alloys-containing 2 at% additions, respectively, are measured using a comprehensive approach of measuring techniques: quasi-elastic neutron scattering, in situ long-capillary experiments combined with x-ray radiography, and a long-capillary experiment under microgravity conditions. Resulting inter- and Ge self-diffusion coefficients are equal within error bars for each investigated alloy. The interdiffusion coefficients are smaller for the alloys containing Ce and Gd, However, no dependence of the atomic mass of the minor additions, that varies by about a factor of seven between Si and Au, on the diffusion coefficients could be observed. This demonstrates that in a loosely-packed metallic liquid with fast diffusive dynamics the diffusion mechanism is highly collective in nature

Item URL in elib:https://elib.dlr.de/128834/
Document Type:Article
Title:Self- and interdiffusion in dilute liquid germanium-based alloys
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Weis, H.Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR e.V.), Linder Höhe, 51170 Köln, GermanyUNSPECIFIED
Kargl, FlorianFlorian.Kargl (at) dlr.deUNSPECIFIED
Kolbe, Matthiasmatthias.kolbe (at) dlr.deUNSPECIFIED
Koza, M.M.Institut Laue-Langevin, Grenoble Cedex, FranceUNSPECIFIED
Unruh, Tforschungsneutronenquelle heinz-meier leibniz (frm-ii), 85747 garching, germanyUNSPECIFIED
Meyer, AndreasAndreas.Meyer (at) dlr.deUNSPECIFIED
Date:August 2019
Journal or Publication Title:Journal of Physics - Condensed Matter
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1088/1361-648X/ab354e
Publisher:Institute of Physics (IOP) Publishing
Keywords:self diffusion, solute diffusion, liquid germanium, quasielastic neutron scattering, long-capillary, x-ray radiography, microgravity
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 - Research under Space Conditions
DLR - Research theme (Project):R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Prochnow, Kim
Deposited On:26 Aug 2019 12:46
Last Modified:15 Jan 2020 15:25

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