ISOTOPE EFFECTS IN THE DIFFUSION AND SOLUBILITY OF HYDROGEN IN NICKEL AND QUANTUM MASS EFFECTS IN DIFFUSION.
ISOTOPE EFFECTS IN THE DIFFUSION AND SOLUBILITY OF HYDROGEN IN NICKEL AND QUANTUM MASS EFFECTS IN DIFFUSION.
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DOI：
10.1063/1.1840859
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发表时间：
1967-02
期刊：
影响因子：
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通讯作者：
Y. Ebisuzaki;W. Kass;M. O'Keeffe
中科院分区：
文献类型：
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作者：
Y. Ebisuzaki;W. Kass;M. O'Keeffe
文摘：在490-690K温度范围内，测量了氢和氢在镍单晶中的溶解度和扩散系数。同位素效应理论是在调和近似下发展起来的。结果表明，实验结果可以用推导出的表达式进行定量解释。通过仅使用氢和氢的相对扩散系数的数据来计算指前扩散因子(DO)来检验该理论。如果假定氢从一个八面体位置直接跃迁到另一个八面体位置，则计算值与实验值非常吻合。一项补充说明讨论了同位素扩散系数比对温度的依赖关系，特别是金属中的氢。
Abstract : The solubility and diffusivity of hydrogen and deuterium in a single crystal of nickel have been measured in the range 490-690K. The theory of isotope effects has been developed in the harmonic approximation. It is shown that the experimental results can be quantitatively accounted for in terms of the derived expressions. The theory is tested by calculation of the pre-exponential factor for diffusion (Do) using only the data for the relative diffusivities of hydrogen and deuterium. The calculated value is in excellent agreement with experiment if it is assumed that direct jumps of hydrogen from one octahedral site to another are involved. A supplementary note discusses the temperature dependence of the ratio of isotope diffusion coefficients with particular reference to hydrogen in metals.