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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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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
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Sondermann, ElkeUNSPECIFIEDhttps://orcid.org/0000-0001-5935-8945UNSPECIFIED
Kargl, FlorianUNSPECIFIEDhttps://orcid.org/0000-0001-9902-0420UNSPECIFIED
Meyer, AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-0604-5467UNSPECIFIED
Date:20 December 2019
Journal or Publication Title:Physical Review Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 255902
Publisher:American Physical Society
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 - Research under Space Conditions
DLR - Research theme (Project):R - Material Design and New Materials
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:22 Nov 2023 06:51

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