当33atomic％Ce替代Sm时(Sm1-yCey)2Fe17Nx的最大磁能积不下降

Unreduced Maximum Energy Product for (Sm1-yCey)2Fe17Nx When Less Than 33 Atomic% Cerium Substitutes for Samarium

摘要:

本文研究了完全氮化的(Sm1-yCey)2Fe17Nx（y = 0、0.20、0.33、0.40、0.45、0.50、0.67、0.80、1.00）粉末的磁性能和微观结构。当用33atomic％Ce代替Sm时，最大磁能积(BH)max从17.8 MGOe变为17.6 MGOe，几乎没有下降。相应的，性能/稀土价格比率提高了39.2％。 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(Sm1-yCey)2Fe17Nx中Ce离子的价态变化。

Abstract:

Magnetic properties and microstructure of fully nitrided (Sm1-yCey)2Fe17Nx (y = 0, 0.20, 0.33, 0.40, 0.45, 0.50, 0.67, 0.80, 1.00) powders have been investigated. When 33 atomic% Ce is substituted for Sm, maximum energy product (BH)max changes from 17.8 MGOe to 17.6 MGOe with almost no decrease. Accordingly, performance/rare earth price ratio increases by 39.2%. 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 (Sm1-yCey)2Fe17Nx was confirmed by XPS.