Structure and magnetic properties of melt-spun Sm-Fe-Nb ribbons and their nitrides

来源期刊:Rare Metals2018年第3期

论文作者:Wen-Long Yan Yang Luo Dun-Bo Yu Gui-Yong Wu Ning-Tao Quan Yuan-Fei Yang Hai-Jun Peng Zi-Long Wang

文章页码:232 - 236

摘    要:SmFe10-xNbx(x = 0, 0.1, 0.2, 0.3) ribbons and their nitrides were prepared by melt-spinning, followed by annealing and subsequent nitriding. The structure and magnetic properties were investigated by means of X-ray diffraction(XRD) using the Rietveld method, vibrating sample magnetometer(VSM), transmission electron microscope(TEM) and Mossbauer spectroscopy. XRD analysis shows that the addition of Nb can impede the precipitation of Sm2 Fe17 and a-Fe phases and the Nb atoms occupy 2 e site in the alloys. At 300 K, the mean hyperfine fields of 2 e site are 29.58 T with Nb doping at x = 0.1 and the corresponding Curie temperature is 552 K. The optimal properties of remanence of Br = 0.9 T, intrinsic coercivity of Hcj= 741.5 kA·m-1, and maximum magnetic energy product of(BH)max= 124.2 kJ·m-3 are gained at x = 0.10 in the nitrides.

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