Mossbauer and X-ray diffraction studies of mechanically alloyed Fe-Al

Powder samples of Fe25Al75 Were prepared by the mechanical alloying method. Mossbauer effect, X-ray diffraction and DSC measurements indicate that Fe and Al crystalline powder transform into Fe-Al amorphous powder with increasing milling time. The X-ray diffraction patterns of the milled Fe25Al75 do not clearly show a sign of the existence of the intermetallic phases or Fe-Al solid solution. However, Mossbauer measurements reveal two sites with hyperfine magnetic fields 30.2 and 26.0 T. These sites form locally during the milling process and then they disappear.