Dresden 2003 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
M: Metallphysik
M 19: Symposium: Phasenumwandlungen in Schmelzen VIII
M 19.6: Vortrag
Dienstag, 25. März 2003, 17:45–18:00, IFW A
Rapid solidification of undercooled Fe-Ge alloy droplets — •Phanikumar Gandham1, Oliver Funke1, Krishanu Biswas2, Kamanio Chattopadhyay2, and Dieter Herlach1 — 1Institut für Raumsimulation, DLR, Linder Höhe, 51147 Köln — 2Department of Metallurgy, Indian Institute of Science, Bangalore 560012, INDIA
The Fe-Ge binary alloy system consists of several critical points and ordered intermetallic compounds. Literature shows that this system is not well studied. Undercooling of liquid droplets provides a method to study rapid solidification and metastable phase formation. We have chosen Fe-Ge as a suitable system to study the solidification microstructure as a function of undercooling. Alloy droplets of Fe-Ge were levitated using an electromagnetic levitation facility and liquid droplets were undercooled to different temperatures and solidified. Growth rate of the solidifying phase, recalescence behaviour and microstructure were studied to analyse the phase selection process as a function of undercooling. Results will be presented for two Fe-rich compositions.