Supergrains produced by lateral growth using Joule-heating induced crystallization without artificial control

Won-Eui Hong; Jangkyun Chung; Donghyun Kim; Seungho Park; Jae-Sang Ro
February 2010
Applied Physics Letters;2/1/2010, Vol. 96 Issue 5, p052105
Academic Journal
In Joule-heating induced crystallization, phase transformation can occur through solid-to-solid or liquid-to-solid phases, according to the input conditions of the pulsed power. It was observed that during a Joule-heating period of several tens of microseconds, randomly nucleated liquid seeds followed by rapid solidification in an amorphous matrix play an important role, especially for liquid-to-solid transformation. Meanwhile, under high-power input processing conditions, supergrains of greater than 5 μm in size were produced by lateral growth from the initial seeds without artificial control.


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