Thermal Stability, Mechanical Properties and Magnetic Properties of Fe-based Amorphous Ribbons with the Addition of Mo and Nb

Abstract

The metallic glass ribbons of <TEX>$[(Fe_xCo_{1-x})_{0.75}B_{0.2}Si_{0.05}</TEX><TEX>]</TEX><TEX>_{96}Mo_4$</TEX> (x = 0, 0.3, 0.6, 0.9 at.%) and <TEX>$[(Fe_xCo_{1-x})_{0.75}B_{0.2}Si_{0.05}</TEX><TEX>]</TEX><TEX>_{96}Nb_4$</TEX> (x = 0, 0.3, 0.6, 0.9 at.%) were obtained by melt spinning with 25-30 <TEX>${\mu}m$</TEX> thickness. The thermal stability, mechanical properties and magnetic properties of Fe-Co-B-Si based systems were investigated. The values of thermal stability were measured using differential scanning calorimetry (DSC), including glass transition temperature (<TEX>$T_g$</TEX>), crystallization temperature (<TEX>$T_x$</TEX>) and supercooled liquid region (<TEX>${\Delta}T_x=T_x-T_g$</TEX>). These amorphous ribbons were identified as fully amorphous, using X-ray diffraction (XRD). The mechanical properties of Febased samples were measured by nano-indentation. Magnetic properties of the amorphous ribbons were measured by a vibrating sample magnetometer (VSM). The amorphous ribbons of <TEX>$[(Fe_xCo_{1-x</TEX><TEX>})_{0.75}B_{0.2}Si_{0.05}</TEX><TEX>]</TEX><TEX>_{96}Mo_4$</TEX> (x = 0, 0.3, 0.6, 0.9 at.%) and <TEX>$[(Fe_xCo_{1-x})_{0.75}B_{0.2}Si_{0.05}</TEX><TEX>]</TEX><TEX>_{96}Nb_4$</TEX> (x = 0, 0.3, 0.6, 0.9 at.%) exhibited soft magnetic properties with low coercive force (<TEX>$H_c$</TEX>) and high saturation magnetization (Ms).