Abstract
A series of multicomponent Zr-base AB 2 alloys (ZrMnNi, ZrTiMnNi, ZrMnVNi, and ZrMnVCoNi) were prepared. The major phase in the alloys had a C15-type structure with the lattice parameter varying with the atomic radii of A and B atoms. Absorption and desorption of hydrogen gas were performed in a Sievert's apparatus. The kinetics of the first few cycles of hydriding-dehydriding was collected. The PCT curves were also established for these alloys. It was found that these kinetic and thermodynamic properties were highly dependent on the solid solution in atomic site of A or B. The hydrogenation properties are explained based on the composition, the alloying element, and the free cell volume of the alloys. © 1995.