Influence of Ta and Nb on the hydrogen absorption kinetics in Zr-based alloys

被引：19

作者：

Conic, D. ^{[1
]}

Gradisek, A. ^{[2
]}

Radakovic, J. ^{[1
]}

Iordoc, M. ^{[3
]}

Mirkovic, M. ^{[1
]}

Cebela, M. ^{[1
]}

Batalovic, K. ^{[1
]}

机构：

[1] Univ Belgrade, Inst Nucl Sci Vinca, Belgrade 11000, Serbia

[2] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia

[3] INCDIE ICPE Adv Res, Natl Inst Res & Dev Elect Engn, Bucharest, Romania

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2015年 / 40卷 / 16期

关键词：

Hydrogen absorption; Zr-alloys; Kinetics; H-1; NMR; Hydrogen diffusion; TERMINAL SOLID SOLUBILITY; ZIRCONIUM ALLOYS; NI INTERMETALLICS; HIGH-TEMPERATURES; ZIRCALOY-4; PERMEABILITY; DIFFUSION; STORAGE; MODELS;

D O I：

10.1016/j.ijhydene.2015.02.083

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：

The kinetics of hydrogen absorption in Zr alloys containing Nb and Ta admixtures (10 wt% Nb, 12 wt%Ta and 10 wt%Nb&12 wt%Ta) is addressed. Hydrogen absorption is measured in the temperature range 400-700 degrees C at hydrogen pressure 1 bar using the volumetric method, and a kinetic analysis is performed to determine the mechanisms and rates of hydrogen absorption. To get further insight into hydrogen diffusivity in zirconium hydride, H-1 NMR spectroscopy is used to provide the activation energies for proton jumping in the studied samples. The tantalum is found to dominantly influence the surface reactivity, while niobium influences large decrease of the activation energy for hydrogen diffusion in the bulk of zirconium hydride. This behavior is linked to the information on the structure of the alloys obtained by XRD. Copyright.(C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：5677 / 5682

页数：6

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