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Kinetics of hydrogen absorption in Zr-based alloys

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2013
Authors
Cekić, Božidar Đ.
Ćirić, Katarina D.
Iordoc, Mihail
Markovic, Smilja
Mitrić, Miodrag
Stojić, Dragica Lj.
Article (Published version)
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Abstract
The kinetics of hydrogen absorption in Zr-based alloys Zr-2.5Nb, Zr-10Nb, Zr-2.5Nb-3Ta and Zr-10Nb-12Ta have been investigated in the temperature range 673-973 K at 1 bar hydrogen pressure. The improvement in hydrogen kinetics and a slight decrease of maximal amount of hydrogen absorbed were observed upon cycling. The rate determining steps are as follows: geometrical contraction for all samples except Zr-10Nb-12Ta; diffusion in the beginning for Zr-10Nb at 973 K Zr-2.5Nb-3Ta at 673 K and 973 K; first order reaction Zr-10Nb-12Ta at all temperatures. The amount of additives, Nb and Ta, is found to have major influence on the mechanism of the absorption process.
Keywords:
hydrogen absorbing materials / Zr-alloys / kinetics / hydriding isotherm
Source:
Journal of Alloys and Compounds, 2013, 559, 162-166
Projects:
  • Nanostructured multifunctional materials and nanocomposites (RS-45018)

DOI: 10.1016/j.jallcom.2013.01.104

ISSN: 0925-8388

WoS: 000316679800029

Scopus: 2-s2.0-84874094886
[ Google Scholar ]
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URI
http://vinar.vin.bg.ac.rs/handle/123456789/5386
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Vinča

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