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In this paper, the effects of P doping on magnetic properties and microstructure were studied in Nd–Fe–B sintered magnets. With P doping, the grain size gets refined and the distribution of the main phase is optimized due to the reduction of the liquidus temperature. The liquidus temperature for the 0.05 wt% P-doped magnets is 1022 K, while that for the P-free magnets is 1038 K. As P content increases,...
Effects of Nb addition and annealing treatment on magnetic properties and microstructure of (Nd0.4Pr0.6)9Fe76–xNbxB15 (x = 0–4) ribbons were systematically investigated by means of vibrating sample magnetometer (VSM) and X-ray diffraction (XRD). The extra phases with nonmagnetic (Nd,Pr)1.1Fe4B4 phase and metastable compound (Nd,Pr)2Fe23B3 crystallized during quenching the Nb-free alloy. Moreover,...
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