Variation of coercivity with Ce content in (Pr,Nd,Ce)2Fe14B sintered magnets | Zendy

Xuefeng Zhang | Zendy; Lele Zhang | Zendy; Zhu-bai Li | Zendy; Jian-Ting Lan | Zendy; Yanli Liu | Zendy; Qiang Ma | Zendy; Yong-Feng Li | Zendy; Qian Zhao | Zendy

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Variation of coercivity with Ce content in (Pr,Nd,Ce)2Fe14B sintered magnets

Author(s) -

Xuefeng Zhang,

Lele Zhang,

Zhu-bai Li,

Jian-Ting Lan,

Yanli Liu,

Qiang Ma,

Yong-Feng Li,

Qian Zhao

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4977722

Subject(s) - coercivity , materials science , magnetocrystalline anisotropy , magnet , curie temperature , analytical chemistry (journal) , anisotropy , phase (matter) , grain boundary , condensed matter physics , nuclear magnetic resonance , metallurgy , ferromagnetism , magnetic anisotropy , magnetization , microstructure , chemistry , magnetic field , physics , optics , organic chemistry , chromatography , quantum mechanics

The variation of coercivity with Ce content was investigated in (Pr,Nd)15-xCexFe77B8 (x=0∼10) sintered magnets. The coercivity of magnets largely decreases from 10.22 to 5.4 kOe with increasing x from 0 to 2. The coercivity rises to 7.68 kOe when x=3 and then decreases again with further increasing Ce content. However, both the magnetocrystalline anisotropy and Curie temperature decrease monotonically with increasing Ce content. EDS composition analysis shows that the Ce concentration in the Re2Fe14B main phase is higher than that in the nominal composition when x≤3, but becomes lower when x>3. These results indicate that Ce tends to be expelled from the main phase and segregates at or near the grain boundary regions if Pr-Nd is excessively substituted by Ce. The change of relative solubility of Ce in Re2Fe14B would lead to the change of distributions of Ce and Pr-Nd elements, and thus result in the change of anisotropy at the grain outer layer, contributing to the abnormal behavior of coercivity. These studied results are also expected to provide a guideline for optimizing the composition design of resource-saving permanent magnets

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