In-Situ Observation of Characteristic Morphology in Rapid Solidification in Highly Supercooled Melt

Solidification Morphology in highly supercooled melt was observed and characteristics studied. High supercooling was performed using a Peltier module that locally cooled the melt of organic material, succinonitrile, near the wall of specimen cell, resulting in rapid solidification at that site. Small dendrites solidified together, showing them predominant in highly supercooled melt. Growth rate of dendrites was demonstrated to have similar dependency on supercooling as that of free dendrites.