Microstructures of Fe77-xNixCu1Nb2P14B6 Soft Magnetic Alloys Studied by X-Ray Absorption Fine Structure

Abstract

Local structures of the mechanically alloyed Fe77-xNixCu1Nb2P14B6 soft magnetic materials have been investigated by x-ray absorption fine structure. The results show that mechanical alloying (MA) can drive the Fe77-xNixCu1Nb2P14B6 powder mixture to produce amorphous alloy when the atomic concentration of Fe element is about and over 40%. On the contrary, the MA Fe77-xNixCu1Nb2P14B6 is a solid solution with an fcc-like structure in the region of lower Fe atomic concentration (< 22%), preserving a medium-range order around Ni and Fe atoms. Moreover, we have found that the local structure geometry of Fe atom is similar to that of Ni atom for all the MA Fe77-xNixCu1Nb2P14B6 samples. It indicates that the local structures of Fe and Ni atoms in a Fe77-xNixCu1Nb2P14B6 sample only depend on the x value of element Ni after ball milling.