Abstract
The hydriding kinetics of the intermetallic compound FeTi were investigated before and after complete activation. FeTi specimens which have been exposed to air can be reactivated at 18°C without heat treatment. The initial reaction rate was very slow but became faster. The initial slow reaction rate is due to the presence of an oxygen film on the FeTi surface. The effect of the activation treatment is enhanced by compacting the FeTi powder with aluminium or manganese powder. This is explained by the fact that the aluminium and manganese powders, which are in intimate contact with the FeTi powder after compacting, react with the oxygen adsorbed on the FeTi surface during the activation heat treatment such that the oxygen film is broken down and new catalytic FeTi surface sites are exposed.
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