Abstract
Mechanical alloying process was studied in the Fe75Al25 system from elemental powders using a dry tumbler ball mill. In the X-ray diffractions, the peaks of the Fe and the Al phases became weak with milling time. The powder milled for 1800ks showed the same patterns as a case of supersaturated solid solution, α-Fe(Al), or very fine Fe3Al. The particles became large in size and lamellar structure formed in the initial milling stage. Scanning electron microscope observations showed that the difference in the contrast of the back scattered electron micrograph of each layer in the lamellar structure was diminished as milling time. The powder became fine (particle size: from 5 to 20μm) after 1800ks. An (Fe3A1+α-Fe) phase formed after milling for 1800ks and annealing at 1500K.
