Structural and hydrogen absorption/desorption properties of YNi<sub>4−<i>x</i></sub>Al<sub><i>x</i></sub>Mg compounds (with 0 ≤ <i>x</i> ≤ 1.5)
Language
en
Article de revue
This item was published in
Journal of Alloys and Compounds. 2008, vol. 461, n° 1-2, p. 228-234
Elsevier
English Abstract
The compounds YNi<sub>4−<i>x</i></sub>Al<sub><i>x</i></sub>Mg with 0 ≤ <i>x</i> ≤ 1.5, crystallizing in the C15 structure type (MgCu<sub>4</sub>Sn-type), have been elaborated by mechanical milling and a subsequent heat ...Read more >
The compounds YNi<sub>4−<i>x</i></sub>Al<sub><i>x</i></sub>Mg with 0 ≤ <i>x</i> ≤ 1.5, crystallizing in the C15 structure type (MgCu<sub>4</sub>Sn-type), have been elaborated by mechanical milling and a subsequent heat treatment at 650 °C for 1 h. It was possible to synthesize the compounds YNi<sub>4−<i>x</i></sub>Al<sub><i>x</i></sub>Mg with <i>x</i> up to approximately 1.15 and the lattice parameters was in good agreement with those already reported. All the samples, excepting the YNi<sub>4</sub>Mg compound, absorbed and desorbed hydrogen reversibly and no structural change is reported after the hydrogenation. A direct relationship between the lattice parameters and the equilibrium plateau pressure was found.Read less <
English Keywords
Intermetallics
Hydrogen storage
Mg-based alloys
Origin
Hal imported