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

被引：120
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.
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页码：1219 / 1222
页数：4
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