Abstract: The superfine alloy powder Fe_(60)Co_(20)C_(20) was prepared by using mechanical alloying method.The samples collected at different ball milling time were analyzed by X-ray diffraction and magnetic hysteresis cycles.The X-ray diffraction analysis show that part of the alloy powders produced amorphous phase after ball milling 20 hours,the formation of amorphous material can be promoted by the addition of C into Fe-Co alloy,the crystal grain sizes of the alloy powders became smaller with the increase of ball ...