Abstract
Mechanical alloying (MA) of Fe-Mo binary system was performed by the low energy ball mill method. Elemental Fe and Mo powders were ball-milled up to 1000h. We characterized the reaction products by X-ray diffraction analysis, high resolution electron microscopy (HREM), and EDX analysis. From the X-ray diffraction patterns of MA powders, it was found that an amorphous phase was obtained in the composition of 30-50at%Mo and single bcc phase was obtained in the composition of 10-20at%Mo and 60-90at%Mo. The amorphization started from an early stage of MA and the amorphous region extended as MA continued. HREM investigation of Fe-30at%Mo and Fe-50at%Mo revealed that fine grains whose particle sizes are several nano-meters exist in the amorphous matrix. By the quantitative analysis by EDX, these grains were found to be Mo rich in composition.
