Oxygen-, Boron- and Nitrogen-Containing Zirconium-Vanadium Alloys as Hydrogen Getters with Enhanced Properties*

Intermetallic alloys as hydrogen getters

“…Annealing at 500 °C recrystallizes the amorphous phase into cubic Zr2Fe, or more probably its oxidized form -Zr4Fe2Ox, as this phase is known to be stabilized by small amount of oxygen [54]. It is worth noting that formation of stable oxygen-containing intermetallic -phases is a feature of not only Zr-Fe-(O) system but also many other systems comprising Zr (and/or Ti) together with other transition metals (e.g., V) and non-metal Z = O, B, N; to form, for example, Zr3V3Zx [55][56][57].The as-spun ribbons show very slow absorption rate at RT (full hydrogenation in 6 h) whereas annealed ribbons absorb readily hydrogen in 30 s though a reduced capacity by 33%, attributed to an absorption-disproportionation reaction. Nevertheless, such ribbons exhibit very good sorption properties, even in oxidized atmosphere.…”

Applications of Zr–V hydrogen getters in vacuum-plasma devices: Phase-structural and hydrogen sorption characteristics

“…3) with the dependence of high-temperature peak on (B,O) content in the -phase presented in [6] allows to estimate that the amount of oxygen in -phase in the studied ZrV(O) equiatomic alloy corresponds to the formula Zr 3 V 3 O <0. 5 . It agrees well both with the estimated total oxygen content in the alloy, and with results of XRD studies (see above).…”

“…The latter are formed by the modification of the alloy with non-metal component, X = O, B, N [4,5]. These alloys have improved hydrogen sorption characteristics including dynamics of sorption of low-pressure hydrogen.…”