International Journal of Hydrogen Energy, Vol.26, No.5, 527-529, 2001
A method for production of amorphous powders of hydrogen-absorbing alloys
A method of centrifugal impact atomization of a melt for production of amorphous powders which absorb hydrogen is described. The technology permits to produce powders of various compositions: Ni-Cu, Zr-Co, Cu-Zr, Zr-Nil Nd-Fe-B. etc, with a size from 37 to 300 mum at solidification speeds of up to million degrees per s. The powder consisted of particles-composites with dissimilar alloys as components were also made. The method consists in melting the components, flowing melt components by a stream to a rotating impeller, disintegrating the stream by the impeller with the blades in two rows, and collecting the droplets on the inner surface of a rotating screen. The essence of the method is layering the liquid droplets on their cooled predecessors. The method enables to obtain the amorphous powders of different compositions of alloys as well as to vary both chemical composition and granulation of the powder at the framework of the same alloy. This significantly extends the nomenclature of the hydride-forming powders for different applications,