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In situ Measurement of Thermodiffusion in Liquid Alloys

Sondermann, Elke and Kargl, Florian and Meyer, Andreas (2019) In situ Measurement of Thermodiffusion in Liquid Alloys. Physical Review Letters, 123 (25), p. 255902. American Physical Society. DOI: 10.1103/PhysRevLett.123.255902 ISSN 0031-9007

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Abstract

Temperature gradients can change the concentration distribution in multicomponent materials. This cross-coupling effect of heat and mass transfer is difficult to measure in liquid alloys. We present a new method using x-ray radiography in combination with a high temperature furnace to measure thermodiffusion in melts time and space resolved. This greatly improves the process control and allows us to determine diffusion and thermodiffusion simultaneously. In a first experiment we demonstrate that in liquid Al78.5Ni21.5 the component nickel diffuses to the cold end of the sample with a Soret coefficient on the order of 10-3 K-1.

Item URL in elib:https://elib.dlr.de/133002/
Document Type:Article
Title:In situ Measurement of Thermodiffusion in Liquid Alloys
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.dehttps://orcid.org/0000-0001-9902-0420
Meyer, AndreasAndreas.Meyer (at) dlr.dehttps://orcid.org/0000-0002-0604-5467
Date:20 December 2019
Journal or Publication Title:Physical Review Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:123
DOI :10.1103/PhysRevLett.123.255902
Page Range:p. 255902
Publisher:American Physical Society
ISSN:0031-9007
Status:Published
Keywords:Soret-Effekt; flüssige Legierung; Metall; Röntgenradiographie
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 Materialdesign und neue Materialien
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Sondermann, Elke
Deposited On:05 Jan 2020 13:55
Last Modified:05 Jan 2020 13:55

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