Abstract
LaNi 3.8 Al 1.0 Mn 0.2 alloy was prepared by vacuum induction melting and melt-spinning. The effects of different preparation techniques of the as-cast, cast then annealed, as-spun and spun then annealed alloys on the microstructure and hydrogen storage properties were investigated. The results indicated that the non-CaCu 5 phases in the alloy became tinier and more dispersive after annealing or melt-spinning compared to those of the as-cast one. But in the spun then annealed alloy, the non-CaCu 5 phases disappeared and only a single-phase with CaCu 5 type structure was found. For all the alloys, the cell volume was increased in an order of as-cast
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