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    Reversing radial segregation and suppressing morphological instability during vertical Bridgman crystal growth by rotation

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    During vertical Bridgman growth of an alloy crystal, local accumulation of solute at the interface center due to buoyancy often causes formation of a deep depression or pit and accelerates morphological instability. Through visualization of the freezing interface during directional solidification of succinonitrile containing ethanol on a rotating table, it was shown that rotation about the ampoule axis might reverse solute distribution and remove pit formation. Simulation was also conducted to explain the observations
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