Dynamic three-dimensional simulation of facet formation and segregation in Bridgman crystal growth
Resource
Journal of Crystal Growth 303 (1): 287-296
Journal
Journal of Crystal Growth
Journal Volume
303
Journal Issue
1
Pages
287-296
Date Issued
2007
Date
2007
Author(s)
Lan, C.W.
Chen, C.J.
Abstract
Facet formation is an important kinetic phenomenon during crystal growth and its simulation remains a non-trivial task in crystal-growth modeling. Numerical models for facet formation have been developed, and its dynamic three-dimensional (3D) simulations, coupled heat flow and segregation in a Bridgman growth process are presented. The growth of yttrium aluminum garnet (YAG) crystals in the [1 1 1] direction having {1 1 1}, {2 1 1}, and {1 1 0} facets are taken as examples. Two numerical schemes for the interface tracking based on the geometric and kinetic models are considered, and the calculated results are found in good agreement. By using different segregation coefficients at the facets and the rough surface, both radial and axial abnormal segregations, such as the dark core, due to facet formation are further simulated. Multiple facets are considered as well. © 2007 Elsevier B.V. All rights reserved.
Type
journal article
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