Effects of Ni and Co alloying on thermal, magnetic and structural properties of Fe-(Ni,Co)-P-C metallic glass ribbons

This study focuses on the production and characterization of ferromagnetic Fe80P13C7 alloys with cobalt and/or nickel additions. Starting from the base composition of Fe80P13C7, an alloy series of Fe(80−x-y)NixCoyP13C7 (x,y = 0, 5, 10, 15, 20 at%; x + y = 20 or 0) has been synthesized using the melt spinning technique. For a fixed amount of metalloids (P13C7), three novel alloys, namely, Fe60Ni15Co5P13C7, Fe60Ni10Co10P13C7 and Fe60Co15Ni5P13C7 have been synthesized and characterized for the first time. The Fe80P13C7, Fe60Ni20P13C7 and Fe60Co15Ni5P13C7 alloys were also subjected to short-term fluxing treatment. Nine types of samples from six different alloy compositions, including three fluxed alloys, were comparatively investigated for their glass-forming abilities, compositional deviations, as well as thermal and magnetic properties. •Three novel FeNiCoPC based alloys were synthesized by arc melting & melt spinning.•Glass forming kinetics, structural & magnetic properties of ribbons were analysed.•Six Fe-based metallic glass compositions were presented in Slater-Pauling plot.•d-electron concentration does not solely determine magnetic moment in Ni-Co adding.•Fluxed Fe60Co15Ni5P13C7 ribbon exhibits a promising GFA and magnetic saturation.