Schiller, Toni und Sondermann, Elke und Meyer, Andreas (2021) New Analyzing Approaches for In Situ Interdiffusion Experiments to Determine Concentration-Dependent Diffusion Coefficients in Liquid Al-Au. Metals. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/met11111772. ISSN 2075-4701.
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Offizielle URL: https://www.mdpi.com/2075-4701/11/11/1772
Kurzfassung
Interdiffusion coefficients are key parameters for the solidification process of liquid alloys. However, the determination of interdiffusion coefficients in liquid metals at high temperatures is a challenging and extensive task, due to a variety of potential systematic errors. In recent years we have developed an X-ray in situ shear cell method for the measurement of interdiffusion coefficients in binary metallic melts. This technique enables the monitoring of the experiment in order to exclude fatal errors. Utilizing X-ray contrast, the method also provides a time-resolved concentration distribution. Such an in situ data set contains significantly more information than ex situ evaluated experiments. Available analyzing strategies do not fully exploit this potential yet. We present three new analyzing approaches that are able to retrieve a concentration-dependent interdiffusion coefficient from only one in situ data set. In that way, larger concentration differences become accessible for an experiment, which considerably decreases efforts. Using simulations, the approaches are checked for robustness. Furthermore, the approaches are run on real in situ data from a binary (0 to 9 at% Au-content) Al-Au alloy at 1000 °C which results in a concentration-dependent interdiffusion coefficient within the measured concentration range.
elib-URL des Eintrags: | https://elib.dlr.de/187996/ | ||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||
Titel: | New Analyzing Approaches for In Situ Interdiffusion Experiments to Determine Concentration-Dependent Diffusion Coefficients in Liquid Al-Au | ||||||||||||||||
Autoren: |
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Datum: | 4 November 2021 | ||||||||||||||||
Erschienen in: | Metals | ||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||
Open Access: | Ja | ||||||||||||||||
Gold Open Access: | Ja | ||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||
DOI: | 10.3390/met11111772 | ||||||||||||||||
Verlag: | Multidisciplinary Digital Publishing Institute (MDPI) | ||||||||||||||||
ISSN: | 2075-4701 | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | interdiffusion; chemical diffusion; binary alloys; analysis; in situ; shear cell; X-ray; liquid metals; Al-Au | ||||||||||||||||
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: | Schiller, Toni | ||||||||||||||||
Hinterlegt am: | 30 Aug 2022 09:07 | ||||||||||||||||
Letzte Änderung: | 23 Okt 2023 09:53 |
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