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Synergistic effect of Co/Ga elements for enhancing magnetic performance of Nd-Fe-B sintered magnets by efficiently diffusing Pr-Tb-Co-Ga alloys 认领 引用
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作者 Ze Duan Xian Wu +7 位作者 Lei Wang Dongmin Zhang Chao Wang Mengchen Ge Yikun Fang Dong Zhou Minggang Zhu Wei Li 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第4期1144-1152,I0005,共9页
High magnetic performance magnets were prepared by applying grain boundary diffusion process(GBDP)using Pr-Tb-Co-Ga alloys.The coercivity is significantly increased from original 1236.2e2121.3 k A/m by diffusing Pr_(6... High magnetic performance magnets were prepared by applying grain boundary diffusion process(GBDP)using Pr-Tb-Co-Ga alloys.The coercivity is significantly increased from original 1236.2e2121.3 k A/m by diffusing Pr60Tb10Co15Ga15alloys.The coercivity is increased by 885.2 k A/m while the remanence decreases only 0.013 T.Furthermore,an excellent temperature stability of coercivity is found at elevated temperate,obtaining coercivity of 817.5 k A/m at 423 K.Obvious Tb-rich shells extend to a depth of 800 mm in the Pr60Tb10Co15Ga15GBDP magnet.It is found that the Tb diffusion coefficient along grain boundary in the Pr60Tb10Co15Ga15GBDP magnet(2.46±0.52)×10-8cm2/s)at 1198 K is the largest among the GBDP magnets studied.The joint use of Co/Ga is beneficial to improvement of the fluidity and wettability of the grain boundary,giving rise to high Tb diffusion efficiency.The results offer guidance for developing magnets with excellent integrated magnetic properties and low heavy rare earth content(0.35 wt%). 展开更多
关键词 Nd-Fe-B magnet Grain boundary diffusion Coercivity Temperature stability Microstructure Rare earths
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