Sorption and desorption of hydrogen in the alloys based on the ErNi^sub 2^ compound
We study the process of formation of pseudobinary Laves phases on the basis of the ErNi^sub 2^ compound realized as a result of the substitution of Y for Er and V for Ni and determine the hydrogen-sorption properties of these phases. The crystal structures of the original compounds and their saturat...
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| Veröffentlicht in: | Materials science (New York, N.Y.) N.Y.), 2007-09, Vol.43 (5), p.682 |
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| creator | Myakush, O V Verbovyts'kyi, Yu V Berezovets', V V Ershova, O H Dobrovol's'kyi, V D Kotur, B Ya |
| description | We study the process of formation of pseudobinary Laves phases on the basis of the ErNi^sub 2^ compound realized as a result of the substitution of Y for Er and V for Ni and determine the hydrogen-sorption properties of these phases. The crystal structures of the original compounds and their saturated hydrides are investigated by the X-ray diffraction method. It is shown that these compounds absorb hydrogen under a pressure of 0.1-0.12 MPa without amorphization. The maximum hydrogen-sorption capacity (3.4 at. H/f.u.) is obtained for the Er^sub 0.85^Y^sub 0.15^Ni^sub 2^ compound. The thermal stability of hydrides is determined by the method of thermodesorption spectroscopy in gaseous hydrogen at a heating rate of 5°C / min. An insignificant substitution o Y for Er and V for Ni improves the parameters of hydrogen sorption and desorption for these compounds. |
| doi_str_mv | 10.1007/s11003-008-9014-1 |
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The crystal structures of the original compounds and their saturated hydrides are investigated by the X-ray diffraction method. It is shown that these compounds absorb hydrogen under a pressure of 0.1-0.12 MPa without amorphization. The maximum hydrogen-sorption capacity (3.4 at. H/f.u.) is obtained for the Er^sub 0.85^Y^sub 0.15^Ni^sub 2^ compound. The thermal stability of hydrides is determined by the method of thermodesorption spectroscopy in gaseous hydrogen at a heating rate of 5°C / min. 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The crystal structures of the original compounds and their saturated hydrides are investigated by the X-ray diffraction method. It is shown that these compounds absorb hydrogen under a pressure of 0.1-0.12 MPa without amorphization. The maximum hydrogen-sorption capacity (3.4 at. H/f.u.) is obtained for the Er^sub 0.85^Y^sub 0.15^Ni^sub 2^ compound. The thermal stability of hydrides is determined by the method of thermodesorption spectroscopy in gaseous hydrogen at a heating rate of 5°C / min. 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| subjects | Alloys Amorphization Desorption Erbium Heating rate Hydrides Hydrogen Hydrogenation Investigations Laves phase Materials science Metals Nickel compounds Sorption Spectrum analysis Substitutes Thermal stability Yttrium |
| title | Sorption and desorption of hydrogen in the alloys based on the ErNi^sub 2^ compound |
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