Abstract
Hydrogen absorption characteristics of FeTi and two kinds of Mg alloys melted in Ar-H2 or pure H2 atmosphere were compared with those melted in Ar atmosphere in order to make clear the effect of atmosphere during the alloy preparation on the activation procedures of these alloys.
The FeTi melted in Ar-H2 atmospheres absorbed much hydrogen rather than the FeTi melted in Ar atmosphere after degassing at 723K and the former alloy was activated more easily than the latter one with activation cycles.
Furthermore, the FeTi melted in Ar-H2 atmosphere showed not only a swift activation but a large hydrogen absorption capacity. Mg-10at%Cu and Mg-10at%Ni alloys melted in pure H2 atmosphere absorbed much hydrogen in comparison with those melted in Ar atmosphere. From these results it can be said that the preparation of the alloy in Ar-H2 atmosphere is an effective method for the production of hydrogen storage alloys.
