The six-jump cycle diffusion mechanism in non-stoichiometric B2 intermetallics: The vacancy-wind factor

被引：5

作者：

Belova, IV ^{[1
]}

Murch, GE ^{[1
]}

机构：

[1] Univ Newcastle, Sch Engn, Diffus Solids Grp, Callaghan, NSW 2308, Australia

来源：

DEFECTS AND DIFFUSION IN METALS - AN ANNUAL RETROSPECTIVE V - | 2003年 / 213-2卷

关键词：

6-jump cycle; B2; intermetallics; vacancy-wind;

D O I：

10.4028/www.scientific.net/DDF.213-215.95

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper we explore the behaviour of the vacancy-wind factor or Manning factor for chemical diffusion in anti structurally disordered intermetallics taking the 132 structure. The analytical formalism is based on generalized six-jump-cycles providing the vehicles for diffusion of both components. Comparison of the analytical results is made with results from Monte Carlo calculations based only on single vacancy jumps. Very good agreement is found at low temperatures/high levels of order where it can be anticipated that six-jump-cycles dominate the diffusion process. In such circumstances, as a first (rough) approximation, it would be reasonable to put the vacancy-wind factor/Manning factor equal to 0.5 rather than unity as is often done.

引用

页码：95 / 106

页数：12

共 12 条

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Belova, I.V.
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