Herlach, Dieter (2010) Homogeneous nucleation and anomalous dendrite growth in undercooled melts. Annual Meeting European Solidification Group, 2010-05-03, Lausanne, Schweiz. (nicht veröffentlicht)
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Kurzfassung
Crystal nucleation in undercooled melts of pure Zr was studied by application of electriomagnetic and electrostatic levitation. Large undercoolings were achieved owing to containerless processing of te liquid sample. In case of eectrostatic levitation, the large undercoolings indicate the onset of homogeneous nucleation. Dendrite growth velocities were measured on elctromagnetically levitated Al-Ni samples as a function of undercooling. In case of Al-rich Al-Ni alloys an anomalous dendritic solidification dynamics was observed such that the growth velocity is decreasing with increasing undercooling. Comparative experiments during TEXUS 44 EML3 mission may suggst that the anomalous growth kinetics is caused by gravity related phenomena.
elib-URL des Eintrags: | https://elib.dlr.de/65690/ | ||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||
Titel: | Homogeneous nucleation and anomalous dendrite growth in undercooled melts | ||||||||
Autoren: |
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Datum: | 4 Oktober 2010 | ||||||||
Open Access: | Nein | ||||||||
Gold Open Access: | Nein | ||||||||
In SCOPUS: | Nein | ||||||||
In ISI Web of Science: | Nein | ||||||||
Status: | nicht veröffentlicht | ||||||||
Stichwörter: | Crystal nucleation, containerless processing, electromagnetic levitation, electrostatic levitation, TEMPUS, dendrite growth in undercooled melts, Al-Ni samples | ||||||||
Veranstaltungstitel: | Annual Meeting European Solidification Group | ||||||||
Veranstaltungsort: | Lausanne, Schweiz | ||||||||
Veranstaltungsart: | Workshop | ||||||||
Veranstaltungsdatum: | 3 Mai 2010 | ||||||||
Veranstalter : | Ecole Polytechnique Federale de Lausanne, Prof. Dr. Micherl Rappaz | ||||||||
HGF - Forschungsbereich: | Verkehr und Weltraum (alt) | ||||||||
HGF - Programm: | Weltraum (alt) | ||||||||
HGF - Programmthema: | W FR - Forschung unter Weltraumbedingungen (alt) | ||||||||
DLR - Schwerpunkt: | Weltraum | ||||||||
DLR - Forschungsgebiet: | W FR - Forschung unter Weltraumbedingungen | ||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | W - Vorhaben Materialforschung unter Mikro-g (alt) | ||||||||
Standort: | Köln-Porz | ||||||||
Institute & Einrichtungen: | Institut für Materialphysik im Weltraum | ||||||||
Hinterlegt von: | Herlach, Dieter | ||||||||
Hinterlegt am: | 20 Okt 2010 09:06 | ||||||||
Letzte Änderung: | 24 Apr 2024 19:31 |
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