Dynamics of surface enrichment in binary mixtures

被引：1
|
作者：
Frisch, Harry L. [1 ]
Puri, Sanjay [2 ]
机构：
[1] SUNY Albany, Dept Chem, Albany, NY 12222 USA
[2] Jawaharlal Nehru Univ, Sch Phys Sci, New Delhi 110067, India
来源：
PHASE TRANSITIONS | 1994年 / 50卷 / 1-3期
关键词：
mean field; Kawasaki dynamics; surface enrichment; binary mixtures;
D O I：
10.1080/01411599408200369
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
We show how simple phenomenological equations for the order parameter characterizing surface enrichment in a binary mixture arise by a sequence of approximations from a semi-infinite lattice gas model with Kawaski spin-exchange dyanmics. The bulk description is via the Cahn-Hilliard equation augmented by two, special boundary conditions. We discuss limitations of the treatment. We present numerical and analytical results, both above and below the bulk critical temperature. The theory mimics qualitatively a number of relevant experimental results.
引用
收藏
页码：105 / 112
页数：8
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