Abstract
The elemental powders were milled by a dry tumbler ball-mill in the Fe-25 mol% Al system. The change in phase of the powder milled in different milling times and subsequently heat-treated at different temperatures was studied. In the thermal analysis (DSC) of the milled powder, a marked exothermic reaction occurred rapidly after a short milling time 36 ks. No remarkable reaction was observed after a long milling time over 360 ks. The milled and subsequently heat-treated powders consisted of different phases according to the milling time and heat-treatment temperature. A “Milling-Time/Heat-Treatment-Temperature/Phase” diagram was obtained from the phase observation results. A single phase of Fe3Al was formed by milling over 360 ks and annealing at 750 K.
