Krüger, Asbjorn Torsvik und Sondermann, Elke und Meyer, Andreas (2022) Measurement of the Soret coefficient in liquid Al-Ag alloys using X-ray radiography. 18th International Conference on Diffusion in Solids and Liquids, 2022-06-27 - 2022-07-01, Florence, Italy.
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Kurzfassung
Thermodiffusion, also called Soret effect, is the separation of the components of a mixture toward the hot/cold regions in a nonuniform temperature distribution. The effect is observed to influence a wide range of systems, from ocean water over magma and crystal growth to stellar plasma. For several organic mixtures the Soret coefficients have been measured with high accuracy. However, for liquid alloys only very few Soret coefficients are known, the reasons being the experimental challenges at the required high temperatures, such as convection, and difficulties of direct analysis. We present our work on determining the Soret coefficient of liquid aluminium-silver in a concentration range of 20 to 55 at.% Ag, using X-ray radiography (XRR). Silver is observed to migrate to the cold side. Thanks to the in-situ measurements with XRR, the transient concentration separation can also be analysed, which makes determination of the inter-diffusion coefficient possible. This inter-diffusion coefficient is then compared to literature values on the same system, corroborating the measured Soret coefficient.
elib-URL des Eintrags: | https://elib.dlr.de/192419/ | ||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||
Titel: | Measurement of the Soret coefficient in liquid Al-Ag alloys using X-ray radiography | ||||||||||||||||
Autoren: |
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Datum: | 29 Juni 2022 | ||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||
Open Access: | Ja | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | Thermodiffusion, Thermophoresis, Diffusion, Liquid metals, Transition metal alloys, Transport phenomena, X-ray imaging | ||||||||||||||||
Veranstaltungstitel: | 18th International Conference on Diffusion in Solids and Liquids | ||||||||||||||||
Veranstaltungsort: | Florence, Italy | ||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||
Veranstaltungsbeginn: | 27 Juni 2022 | ||||||||||||||||
Veranstaltungsende: | 1 Juli 2022 | ||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||
HGF - Programmthema: | Forschung unter Weltraumbedingungen | ||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||
DLR - Forschungsgebiet: | R FR - Forschung unter Weltraumbedingungen | ||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Materialforschung und Mikrogravitation (MuM) | ||||||||||||||||
Standort: | Köln-Porz | ||||||||||||||||
Institute & Einrichtungen: | Institut für Materialphysik im Weltraum > Wissenschaftliche Experimente | ||||||||||||||||
Hinterlegt von: | Krüger, Asbjorn Torsvik | ||||||||||||||||
Hinterlegt am: | 19 Dez 2022 07:36 | ||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:53 |
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