کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1795783 | 1023729 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effective segregation coefficient in cluster crystallization model
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
An expression for the effective segregation coefficient keff is derived at the assumption that the crystallization begins in the melt within the supercooled diffusion layer by the formation of complex anion structures (clusters). The dependence of keff on the equilibrium segregation coefficient k0, the thickness of the supercooled boundary layer Ï and the crystal growth rate V is determined for a low supercooling at the melt-crystal interface. There is no necessity to introduce the concept of the interface segregation coefficient (which is equal to the ratio of the concentration in the crystal to that in the melt at the interface), when the presence of the anion structures in the melt is taken into account. The mutual dependence of V and Ï is considered. The formula derived fits well to the experimental data for the range of the low crystal growth rates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 303, Issue 1, 1 May 2007, Pages 110-113
Journal: Journal of Crystal Growth - Volume 303, Issue 1, 1 May 2007, Pages 110-113
نویسندگان
Yu.D. Zavartsev, A.I. Zagumennyi, S.A. Koutovoi,