Diffusion induced segregation in the case of the ternary system sphalerite, chalcopyrite and cubanite

被引：8
作者：
Blesgen, T
Luckhaus, S
Bente, K
机构：
[1] Max Planck Inst Math Sci, D-04109 Leipzig, Germany
[2] Univ Leipzig, Fac Math & Comp Sci, D-04103 Leipzig, Germany
[3] Univ Leipzig, Inst Mineral Crystallog & Mat Sci, D-04275 Leipzig, Germany
来源：
CRYSTAL RESEARCH AND TECHNOLOGY | 2004年 / 39卷 / 11期
关键词：
structure gradients; phase transitions; ternary systems;
D O I：
10.1002/crat.200410282
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
A mathematical model for describing natural and experimental diffusion induced segregation (DIS) in the case of a (Zn,Fe)S single crystal with three coexisting phases is derived. As main result, a new and quite general segregation principle for ternary systems is discovered where one phase has a flat free energy density and serves as catalyst for the segregation of the other two phases. The model includes also a stochastic noise term to represent fluctuations of the copper concentration. Numerical simulations in 2-d underline the physical significance of the model and allow to make quantitative predictions. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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页码：969 / 979
页数：11
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