TRACER DIFFUSION AND CHEMICAL DIFFUSION OF HYDROGEN IN TAHX

被引：10

作者：

POTZEL, U

VOLKL, J

WIPF, H

MAGERL, A

机构：

[1] TH DARMSTADT,INST FESTKORPERPHYS,D-6100 DARMSTADT,FED REP GER

[2] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

来源：

PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1984年 / 123卷 / 01期

关键词：

D O I：

10.1002/pssb.2221230110

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The chemical diffusion coefficient Dc and the tracer diffusion coefficient Dt of H in α- and α≈-phase TaHx are measured in complementary Gorsky-effect (Dc) and neutron spectroscopic (Dt) experiments. Whereas Dc and Dt differ only slightly for x ≈ 0.28, Dc exceeds Dt by a factor of ≈ 20 for x ≈ 0.61. The difference between Dc and Dt is chiefly determined by the value of the thermodynamic factor which is additionally obtained in the Gorsky-effect experiments. The large difference found for the higher concentration shows that neutron spectroscopic and NMR results for Dt provide only limited information on bulk hydriding kinetics in H storage compounds. Copyright © 1984 WILEY-VCH Verlag GmbH & Co. KGaA

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页码：85 / 92

页数：8

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