CORRELATION FACTOR FOR DIFFUSION VIA SUBLATTICE VACANCY MECHANISM IN THE L12-TYPE ORDERED ALLOY

被引：21
|
作者：
ITO, T
ISHIOKA, S
KOIWA, M
机构：
[1] KANAGAWA UNIV HIRATSUKA,DEPT INFORMAT SCI,HIRATSUKA 25912,JAPAN
[2] KYOTO UNIV,DEPT MET SCI & TECHNOL,KYOTO 606,JAPAN
来源：
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1990年 / 62卷 / 05期
关键词：
D O I：
10.1080/01418619008244915
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In A3B alloys of the L12 type, while the B atoms have only unlike nearest neighbours, the A atoms have a mixed neighbourhood. Therefore, the A atoms can diffuse by exchanging sites with vacancies on its own sublattice without concomitant disordering. The impurity correlation factor for such a mechanism (termed the sublattice vacancy mechanism) are calculated exactly by adopting the five-jump frequency model. The expression is compared with those for other cubic lattices derived previously. © 1990 Taylor & Francis Group, LLC.
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页码：499 / 510
页数：12
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