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Effect of Co substitution and annealing treatment on the formation,magnetic properties and microstructure of(NdDyTb) 12.3(FeZrNbCu) 81.7-xCoxB6(x=0-15) ribbons prepared by rapid quenching and subsequent annealing was systematically investigated by means of differential scanning calorimeter(DSC) ,X-ray diffraction(XRD) ,high resolution scanning electron microscopy(HRSEM) and vibrating sample magnetometer(VSM) . Phase analysis revealed single-phase material. The remanence polarization Jr and maximum energy product(BH) max increased with increasing x from 0 to 12 and then decreased for x=15. The intrinsic coercivity Hci of(NdDyTb) 12.3(FeZrNbCu) 81.7-xCoxB6 ribbons optimally processed decreased from 1308.7 kA/m for x=0 to 817.4 kA/m for x=15. Optimum magnetic properties with Jr=1.041 T,Hci=944.9 kA/m and(BH) max=155.1 kJ/m3 were achieved by annealing melt-spun ribbon(x=12) at 675 °C for 10 min. There was no significant influence of Co substitution on microstructure.
Effect of Co substitution and annealing treatment on the formation, magnetic properties and microstructure of (NdDyTb) 12.3 (FeZrNbCu) 81.7-xCoxB6 (x = 0-15) ribbons prepared by rapid quenching and subsequent annealing was systematically investigated by means of differential scanning calorimeter (DSC), X-ray diffraction (XRD), high resolution scanning electron microscopy (HRSEM) and vibrating sample magnetometer (VSM). Phase analysis revealed single-phase material. The remanence polarization Jr and maximum energy product increasing x from 0 to 12 and then decreased for x = 15. The intrinsic coercivity Hci of (NdDyTb) 12.3 (FeZrNbCu) 81.7-xCoxB6 ribbons optimally processed decreased from 1308.7 kA / m for x = 0 to 817.4 kA / m for x = 15. Optimum magnetic properties with Jr = 1.041 T, Hci = 944.9 kA / m and (BH) max = 155.1 kJ / m3 were achieved by annealing melt- spun ribbon (x = 12) at 675 ° C for 10 min. no significant influence of Co substitution on microstructure.