Enhanced maximum energy product of(Sm1-yYy)2Fe17Nx caused by abundant yttrium doping
来源期刊：Journal of Rare Earths2020年第10期
论文作者：Jianwei Xu Jingwu Zheng Liang Qiao Yao Ying Wei Cai Wangchang Li Jing Yu Min Lin Shenglei Che
文章页码：1060 - 1068
摘 要：Replacement of samarium（Sm） with abundant yttrium（Y） can help solve the potential shortage of Sm in the preparation of promising Sm2 Fe17 Nx magnets.In this article,phase composition,microstructure and magnetic properties of(Sm1-yYy)2 Fe17Nx（y=0,0.2,0.4,0.6,0.8,1.0） were investigated.Maximum energy product（BH）max is improved when less than 40 at% Y is doped in(Sm1-yYy)2 Fe17Nx powder.In particular,when 20 at% Y replaces Sm,（BH）max of(Sm1-yYy)2 Fe17Nx powder increases by 15.1% from 131.7 to151.6 kJ/m3.The effect of annealing temperature on the structural properties of high Y doping(Sm0.6Y0.4)2 Fe17 and the magnetic properties of the corresponding nitrides were subsequently investigated.In the RE2 Fe17 phase grain combination process,the interlaced structure of the rhombohedral Th2 Zn17-type structural phase and the hexagonal Th2 Ni17-type structural phase is formed.Due to shortrange exchange coupling,the nitride with the highest content of two interlaced RE2 Fe17 phases has the highest magnetic properties:Br=1.23 T,HcJ=443.9 kA/m and（BH）max=197.6 kJ/m3.
Jianwei Xu1，Jingwu Zheng1，Liang Qiao1，Yao Ying1，Wei Cai1，Wangchang Li1，Jing Yu1，Min Lin3，Shenglei Che1
1. Research Center of Magnetic and Electronic Materials,College of Materials Science and Engineering,Zhejiang University of Technology3. Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Material Technology & Engineering,Chinese Academy of Science
摘 要：Replacement of samarium（Sm） with abundant yttrium（Y） can help solve the potential shortage of Sm in the preparation of promising Sm2 Fe17 Nx magnets.In this article,phase composition,microstructure and magnetic properties of(Sm1-yYy)2 Fe17Nx（y=0,0.2,0.4,0.6,0.8,1.0） were investigated.Maximum energy product（BH）max is improved when less than 40 at% Y is doped in(Sm1-yYy)2 Fe17Nx powder.In particular,when 20 at% Y replaces Sm,（BH）max of(Sm1-yYy)2 Fe17Nx powder increases by 15.1% from 131.7 to151.6 kJ/m3.The effect of annealing temperature on the structural properties of high Y doping(Sm0.6Y0.4)2 Fe17 and the magnetic properties of the corresponding nitrides were subsequently investigated.In the RE2 Fe17 phase grain combination process,the interlaced structure of the rhombohedral Th2 Zn17-type structural phase and the hexagonal Th2 Ni17-type structural phase is formed.Due to shortrange exchange coupling,the nitride with the highest content of two interlaced RE2 Fe17 phases has the highest magnetic properties:Br=1.23 T,HcJ=443.9 kA/m and（BH）max=197.6 kJ/m3.
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