【摘要】 研究了完全氮化的(Sm_1-yCe_y)₂Fe₁₇N_x （y=0, 0.20, 0.33, 0.45, 0.50, 0.67, 0.80, 1.00）粉末的磁性能和微观结构。当用33at%Ce代替Sm时,最大磁能积（BH）max从141.6 kJ/m³变为140.1 kJ/m³,几乎没有下降。相应地,性能/稀土价格比率提高了39.6%。根据能量色散光谱（EDS）分析,Ce倾向于分布在REFe₃/REFe₂晶界相中。XPS证实了(Sm_1-yCe_y)₂Fe₁₇N_x中Ce离子的价态变化。更多还原

【Abstract】 Magnetic properties and microstructure of fully nitrided(Sm_1-yCe_y)₂Fe₁₇N_x（y = 0, 0.20, 0.33, 0.45, 0.50, 0.67, 0.80, 1.00） powders have been investigated. When 33 at% Ce is substituted for Sm, maximum energy product（BH）_max changes from 141.6 kJ/m³ to 140.1 kJ/m³ with almost no decrease. Accordingly, performance/rare earth price ratio increases by 39.6%. According to the energy dispersive spectroscopy（EDS） analysis, Ce tends to be distributed in the REFe₃/REFe₂ grain boundary phase. Meanwhile, valence change of the Ce ion in(Sm_1-yCe_y)₂Fe₁₇N_x was confirmed by XPS.更多还原