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Inductive measurement of thermophysical properties of electromagnetically levitated metallic melts

Lohöfer, Georg und Pottlacher, Gernot (2011) Inductive measurement of thermophysical properties of electromagnetically levitated metallic melts. High Temperatures - High Pressures, 40, Seiten 237-248. Old City Publishing, Inc..

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Kurzfassung

For the containerless processing of high temperature metallic melts the electromagnetic levitation technique, which utilizes high frequency alternating magnetic fields for the contactless, inductive positioning and heating of electrically conducting samples, is well established. For the contactless measurement of surface tension and viscosity of levitated samples via the oscillating drop method optical methods are generally used. But the existence of alternating magnetic fields in electromagnetic levitation facilities suggests to use also inductive methods for non-contact measurements of liquid metal properties. Within a joint ESA project of DLR and TU Graz a measurement device was designed and constructed by DLR, which utilizes the high frequency magnetic fields of microgravity electromagnetic levitation facilities imultaneously also for an inductive determination of thermophysical properties of levitated metallic melts. Although originally planned for electrical resistivity measurements only, the device allows also the detection of surface oscillations, which can be used for a determination of surface tension and viscosity of the levitated droplets. The present paper compares the optical with the inductive measurement technique.

Dokumentart:Zeitschriftenbeitrag
Titel:Inductive measurement of thermophysical properties of electromagnetically levitated metallic melts
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Lohöfer, GeorgGeorg.Lohoefer@dlr.de
Pottlacher, GernotTU Graz
Datum:2011
Erschienen in:High Temperatures - High Pressures
Referierte Publikation:Ja
In Open Access:Ja
In ISI Web of Science:Ja
Band:40
Seitenbereich:Seiten 237-248
Verlag:Old City Publishing, Inc.
Status:veröffentlicht
Stichwörter:electromagnetic levitation, micro gravity, inductive measurement technique, electrical resistivity, surface oscillation, viscosity, surface tension
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 - Vorhaben Materialforschung unter Mikro-g
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Materialphysik im Weltraum
Hinterlegt von: Georg Lohöfer
Hinterlegt am:12 Dez 2011 13:12
Letzte Änderung:12 Dez 2011 13:12

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