有色金属科学与工程2026，Vol.17Issue(1)：147-155,9.DOI:10.13264/j.cnki.ysjskx.2026.01.016
Ga添加对(Nd,Ce)-Fe-B磁体的晶界相及磁性能的影响
Effect of Ga addition on the grain boundary phase and magnetic properties of(Nd,Ce)-Fe-B magnets
摘要
Abstract
This study investigates the impact of Ga on the microstructure and magnetic properties in the grain boundary phase of(Nd,Ce)-Fe-B sintered NdFeB magnets.With 0.1%Ga doping,the intrinsic coercivity(Hcj)of the magnet increases from 891.52 kA/m to 1 043.56 kA/m.The addition of trace amounts of Ga increases the proportion of the REFe2(RE=Pr,Nd,Ce)phase in the grain boundaries,but lowers the Ce concentration in the REFe2 phase.As a result,a REFe2 phase enriched in Pr and Nd but depleted in Ce is formed.This phase absorbs Fe elements in the adjacent two-particle grain boundaries(adjacent main phase grain boundaries).It drives more Ce elements from the grain boundary triangle(TJP)with high Pr,Nd and low Ce concentration into the two-particle grain boundaries of the REFe2 phase.Consequently,the two-particle grain boundaries become smoother and more continuous.Additionally,doping with Ga reduces the aggregation of rare earth-rich phases and lowers the eutectic melting point at grain boundaries,thereby improving grain boundary wettability.These effects refine the magnetic microstructure,produce smoother and more continuous grain boundaries,strengthen the magnetic decoupling between main phase grains,and ultimately enhance the magnet's coercivity.关键词
Ga添加/(Nd,Ce)-Fe-B磁体/晶界相调控/REFe2相Key words
Ga addition/(Nd,Ce)-Fe-B magnets/regulation of grain boundary phase/REFe2 phase分类
矿业与冶金引用本文复制引用
尧唤茂,王磊,胡欣洋,赵康..Ga添加对(Nd,Ce)-Fe-B磁体的晶界相及磁性能的影响[J].有色金属科学与工程,2026,17(1):147-155,9.基金项目
江西省自然科学基金资助项目(20212BAB204021) （20212BAB204021）
