| Fe2Si5 melts were deeply undercooled using an electromagnetic levitator and their growth velocity was measured by a high speed video camera in order to reveal the solidification behavior of intermetallic compounds. The growth morphology drastically changed depending on the undercooling, ΔT . The faceted planes were observed on the surface of the sample at ΔT ≤ ∼ 50K. With increasing undercoolings, the morphology changed into typical facet dendrite. Especially at the high undercooling of ΔT ≤ ∼100K, a dendrite of hexagonal symmetry clearly formed. The growth velocities were measured as a function of undercooling and compared with the classical dendritic growth theory. The interfacial kinetics is thought to be crucial for the solidification of Fe2Si5. |
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