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徐健伟,郑精武,陈海波,乔梁,应耀,蔡伟,李旺昌,余靓,林旻,车声雷.当33atomic%Ce替代Sm时(Sm1-yCey)2Fe17Nx的最大磁能积不下降[J].稀有金属材料与工程(英文),2020,49(10):3412~3418.[Xu Jianwei,Zheng Jingwu,Chen Haibo,Qiao Liang,Ying Yao,Cai Wei,Li Wangchang,Yu Jing,Lin Min and Che Shenglei.Unreduced Maximum Energy Product for (Sm1-yCey)2Fe17Nx When Less Than 33 Atomic% Cerium Substitutes for Samarium[J].Rare Metal Materials and Engineering,2020,49(10):3412~3418.]
Unreduced Maximum Energy Product for (Sm1-yCey)2Fe17Nx When Less Than 33 Atomic% Cerium Substitutes for Samarium
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Received:October 11, 2019  Revised:November 08, 2019
DOI:
Key words: Sm2Fe17Nx, Ce  substitution, maximum  energy product, phase  aggregation, Ce  valence shift
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
Xu Jianwei,Zheng Jingwu,Chen Haibo,Qiao Liang,Ying Yao,Cai Wei,Li Wangchang,Yu Jing,Lin Min and Che Shenglei  
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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.