Non-equilibrium solidification of undercooled Co-Si melts

The effect of melt undercooling on solidification modes of peritectic Co-Si alloys has been studied by electromagnetic levitation. For Co82.5Si17.5, Co81Si19 and Co75Si25 alloys there are transitions towards direct crystallization of peritectic epsilon-Co and a metastable Co3Si phase, respectively. For Co73Si27 a morphology change of the equilibrium alpha-Co2Si phase was observed. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.