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

引用

页码：85 / 92

页数：8

共 42 条

[21] DIFFUSION, CORRELATION, AND PERCOLATION IN A RANDOM ALLOY [J].

MURCH, GE ;

ROTHMAN, SJ .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1981, 43 (01) :229-238

[22]

Peisl H., 1978, Hydrogen in metals I, P53

[23]

POTZEL U, UNPUB

[24] TRITIUM DIFFUSION IN V, NB AND TA [J].

QI, Z ;

VOLKL, J ;

LASSER, R ;

WENZL, H .

JOURNAL OF PHYSICS F-METAL PHYSICS, 1983, 13 (10) :2053-2062

[25] QUASIELASTIC NEUTRON SCATTERING BY HYDROGEN IN ALPHA-PHASES AND BETA-PHASES OF VANADIUM HYDRIDE [J].

ROWE, JM ;

SKOLD, K ;

FLOTOW, HE ;

RUSH, JJ .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1971, 32 (01) :41-&

[26] DIFFUSION COEFFICIENTS OF HYDROGEN AND DEUTERIUM IN VANADIUM, NIOBIUM, AND TANTALUM BY GORSKY-EFFECT MEASUREMENTS [J].

SCHAUMANN, G ;

VOLKL, J ;

ALEFELD, G .

PHYSICA STATUS SOLIDI, 1970, 42 (01) :401-+

[27] RELAXATION PROCESS DUE TO LONG-RANGE DIFFUSION OF HYDROGEN AND DEUTERIUM IN NIOBIUM [J].

SCHAUMANN, G ;

VOLKL, J ;

ALEFELD, G .

PHYSICAL REVIEW LETTERS, 1968, 21 (13) :891-+

[28]

Schober T., 1978, TOP APPL PHYS, V29, P11

[29] POINT DEFECTS IN BODY-CENTERED CUBIC TRANSITION METALS [J].

SCHULTZ, H .

MATERIALS SCIENCE AND ENGINEERING, 1968, 3 (04) :189-+

[30] NMR MEASUREMENT OF HYDROGEN DIFFUSION IN BETA-PALLADIUM HYDRIDE [J].

SEYMOUR, EFW ;

COTTS, RM ;

WILLIAMS, WD .

PHYSICAL REVIEW LETTERS, 1975, 35 (03) :165-167

← 1 2 3 4 5 →