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Effects of Zr addition and annealing treatment on the formation, microstructure and magnetic properties of Nd12.3Fe81.7?xZrxB6.0 (x=0―3.0) ribbons melt-spun and annealed have been systematically investigated by means of vibrating sample magnetometer (VSM), differential scanning calorimeter (DSC), X-ray diffraction (XRD), and high resolution scanning electron microscopy (HRSEM). Phase analysis reveals that Nd2Fe14B is single-phase material. It has been found that the intrinsic coercivity Hci of the optimally processed Nd12.3Fe81.7?xZrxB6.0 ribbons increases monotonically from 751.7 kA/m for x=0 to 1005.3 kA/m for x=3.0. The remanence polarization Jr and maximum energy product (BH)max increase first with Zr addition, then slightly decrease with further increasing Zr content. Optimum magnetic properties with Jr=1.041 T, Hci=887.5 kA/m and (BH)max=175.2 kJ/m3 have been achieved for the ribbons with x=1.5. The significant improvement of magnetic properties originates from the finer grains of the ribbons by introducing Zr.
Effects of Zr addition and annealing treatment on the formation, microstructure and magnetic properties of Nd12.3Fe81.7? XZrxB6.0 (x = 0-3.0) ribbons melt-spun and annealed have been systematically investigated by means of vibrating sample magnetometer (VSM ), differential scanning calorimeter (DSC), X-ray diffraction (XRD), and high resolution scanning electron microscopy (HRSEM). Phase analysis reveals that Nd2Fe14B is single-phase material. It has been found that the intrinsic coercivity Hci of the optimally processed Nd12.3Fe81.7? xZrxB6.0 ribbons increases monotonically from 751.7 kA / m for x = 0 to 1005.3 kA / m for x = 3.0. The remanence polarization Jr and maximum energy product (BH) max increase first with Zr addition, Optimum magnetic properties with Jr = 1.041 T, Hci = 887.5 kA / m and (BH) max = 175.2 kJ / m3 have been achieved for the ribbons with x = 1.5. The significant improvement of magnetic properties originates from the finer grains of the ribbons by introducing Zr.