Open AccessCoercivity enhancement of (Nd,Ce)-Fe-B sintered magnets by doping Nd-Fe additives
Author(s) -
Kai Chen,
Shuai Guo,
X. D. Fan,
Guocheng Ding,
Jinghui Di,
R. J. Chen,
D. Lee,
Aru Yan
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 - 10.1063/1.4976722
Subject(s) - coercivity , magnet , materials science , remanence , microstructure , grain boundary , doping , phase (matter) , grain size , nuclear magnetic resonance , metallurgy , composite material , magnetization , condensed matter physics , magnetic field , chemistry , optoelectronics , physics , organic chemistry , quantum mechanics
The effect of Nd-Fe additives on magnetic properties and microstructure in (Nd,Ce)-Fe-B sintered magnet has been investigated. By doping 3wt% Nd-Fe additives, the coercivity of the magnet increases from 10.56kOe to 12.69kOe with slight remanence decrease. Microstructure observation reveals that the volume fraction of the grain boundary phase increases accompanying with the thickening of the thin grain boundary between the adjacent grains. The RE6Fe13Cu phase which has low melting temperature develops at the triple junction position and the out shell of the matrix grains get magnetically hardened with 3wt% Nd-Fe additives. The results of the dynamic magnetic domains between the original magnet and processed magnet elucidate that the formation of reversed magnetic domains are more difficult for the processed magnet which is the direct evidence to clarify the coercivity enhancement
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