Amorphization of Co-Nb Magnetic Alloys by Mechanical Alloying

Formation of amorphous Co-Nb system by mechanical alloying (MA) in the composition range of Co₂₅Nb₇₅-Co₇₀Nb₃₀ was studied by X-ray diffraction. Magnetic properties of the mechanically alloyed Co₇₀Nb₃₀ powder were measured. The variation in H_c curve with milling time can be explained by two-stage mechanism involved in the milling process. The results show that the amorphous powder prepared by MA is of good soft magnetic properties.