HIGHLIGHTS
SUMMARY
Experiments on crystal growth and solidification in microgravity have a long tradition. The most common coupled-growth patterns are alternating lamellae of the two phases, and rods of the minority phase in a matrix of the majority phase. In phase-field simulations it was observed that the transition from lamellae to rods proceeds in a propagative manner: the instability starts at lamella terminations, and one rod after another "pinches off" from the lamella. Since the critical volume fraction for the transition from rods to lamellae decreases with decreasing velocity, for a fixed composition (at . . .
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