Effect of high-frequency vibrations on oriented crystallization of binary alloys
Journal
Journal of Surface Investigation
Journal Volume
3
Journal Issue
1
Pages
116-120
Date Issued
2009
Author(s)
Abstract
The effect of high-frequency rotational vibrations with small amplitude on the oriented crystallization of binary alloys has been numerically studied. The calculations have been made in the framework of the quasi-static approach for succinonitrile-acetone and succinonitrile-salol binary systems. It has been shown that at a large solidification rate and/or high impurity concentration both for a lighter impurity (acetone) and for a heavier one (salol) a pit is formed on the axis of symmetry during growth which accelerates the development of morphological instability. Rotational vibrations make a strong stabilizing effect. The threshold for morphological instability increases with an increase in the vibration intensity, the radial segregation of an impurity decreases, and the pit is not formed. © Pleiades Publishing, Ltd., 2009.
Type
journal article