HYDROGEN DIFFUSION IN AMORPHOUS NI-NB

被引：1

作者：

ZHAO, Y ^{[1
]}

RYAN, DH ^{[1
]}

STROMOLSEN, JO ^{[1
]}

HUAI, Y ^{[1
]}

COCHRANE, RW ^{[1
]}

机构：

[1] UNIV MONTREAL,DEPT PHYS,MONTREAL H3C 3J7,QUEBEC,CANADA

来源：

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS | 1994年 / 183卷

关键词：

METAL GLASS; DIFFUSION; PERMEATION; BINDING ENERGIES; SITE OCCUPATION;

D O I：

10.1524/zpch.1994.183.Part_1_2.059

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An electrochemical double-cell method has been used to measure diffusion constants and chemical potentials of hydrogen in amorphous Ni1-xNbx (x = 0.20, 0.26, 0.34, 0.41, 0.54, and 0.62). Ni-Nb has a smaller binding energy for hydrogen than the similar Ni-Zr and thus it is possible to probe the Nb4 sites rather than the 3Zr-Ni sites studied in the latter system. Using a gaussian distribution of hydrogen binding energies for the 4Nb sites we find a mean binding of -100 +/- 15 MeV with a half-width of 100 +/- 25 MeV. The diffusion constant of hydrogen depends on both alloy composition and hydrogen concentration, ranging from 10(-15) to 10(-12) m2 s-1.

引用

页码：59 / 64

页数：6

共 7 条

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