Abstract

Laves phase Ti-Mn-V type hydroden absorbing alloys are used for heat utilization systems such as refrigeration systems. Since the Ti-Mn-V alloys made by rapid solidification method show no segregation, the plateau becomes flat. However this effect is varied with the cooling rate. For this reason hydrogen absorption properties of hydrogend absorbing alloys made in various rapid solidification conditions were investigated. The measurements of pressure-composition isotherms, X-ray powder diffraction analyses and EPMA measurements were performed. As a result, it is found that the most suitable cooling rate exists for each alloy, and if cooling rate is too high, a peak width of X-ray powder diffraction broaden and the plateau becomes slope.

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