PRESSURE-DEPENDENCE AND ISOTOPE EFFECT OF SELF-DIFFUSION IN A METALLIC-GLASS

被引：121

作者：

FAUPEL, F

HUPPE, PW

RATZKE, K

机构：

[1] Institut F̈r Metallphysik, Universität Göttingen

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 10期

关键词：

24;

D O I：

10.1103/PhysRevLett.65.1219

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The pressure dependence and isotope effect of cobalt diffusion have been measured in amorphous Co76.7Fe2Nb14.3B7 and in fcc Co. Within experimental accuracy no pressure dependence and an isotope effect E=(D/D-1)/[(m>/m>)1/2-1]=0.1 were found in Co76.7Fe2Nb14.3B7. These results show that diffusion in the metallic glass is not mediated through quasivacancies in thermal equilibrium similar to crystalline Co. Diffusion rather occurs via a direct mechanism involving about ten atomic masses. © 1990 The American Physical Society.

引用

页码：1219 / 1222

页数：4

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