HYDRIDES FORMED IN ZrCo2 - BASED INTERMETALLIC COMPOUNDS UNDER HIGH HYDROGEN PRESSURE
Journal
Archives of Metallurgy and Materials
Journal Volume
58
Journal Issue
1
Pages
223-226
Date Issued
2013
Author(s)
Filipek, S. M.
Kuriyama, N.
Takeichi, N.
Tanaka, H.
Bulyk, I. I.
Kuo, H. T.
Tu, M. H.
Kochman, M.
Abstract
The hydrides of zirconium based pseudobinary alloys Zr(Co1-xTx)2, (T = Fe, V or Cr) and Zr1-xRxCo2 (R = Y, La, Pr) were synthesized under 1.2 GPa of hydrogen pressure. It was revealed that partial substitution of cobalt by V, Cr or Fe increases hydrogen absorption capacity and stability of derived hydrides. Especially, it was found that ZrCo1:8V0:2 alloy exposed to high hydrogen pressure can absorb 50% more hydrogen than pure ZrCo2 and the hydride ZrCo1:8V0:2Hy has surprisingly high stability. Substitution of zirconium by Y, La or Pr in ZrCo2 alloys improved hydrogen absorption but hydrides derived from La and Pr substituted alloys were less stable than ZrCo2H2. Only for Zr0:7Y0:3Co0:2Hy the hydrogen absorption was higher and desorption rate markedly smaller comparing ZrCo2H2.
SDGs
Type
journal article