Effect of adding non-ferromagnetic nanoparticles to grain boundary on coercivity of sintered Nd-Fe-B magnet

Thanh, Pham Thi; Duong, Nguyen Anh; Yen, Nguyen Hai; Ngoc, Nguyen Huy; Lam, Nguyen Mau; Hau, Kieu Xuan; Yu, Seong Cho; Dan, Nguyen Huy

doi:10.1016/j.cap.2017.12.014

Cited by 6 publications

(1 citation statement)

References 18 publications

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“…14) Furthermore, Cu and Al can also improve the corrosion resistance of the added magnets because of their relatively high electrode potential. 23) In our previous studies, 24,25) the influence of addition of nanoparticles on the magnetic properties of the sintered Nd FeB magnets was investigated. The coercivity above 20 kOe could be achieved by adding nanoparticles of Dy 40 Nd 30 Al 30 and Nd 40 Cu 30 Al 30 to grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Coercivity Enhancement of Sintered Nd–Fe–B Magnets by Intergranular Adding Micro-Structured Dy–Nd–Pr–Al–Cu Powder

et al. 2023

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In this work, microstructure and magnetic properties of sintered Nd 16.5 Fe 77 B 6.5 magnets with intergranular addition of Dy 30 Nd 17 Pr 3 Al 40 Cu 10 were investigated. The additional particles with size in the range of 12 µm were homogeneously mixed into micrometer Nd 16.5 Fe 77 B 6.5 master powder with different weight fractions. The investigation shows that coercivity H c of the added magnets significantly increases, while their remanence B r decreases with increasing Dy 30 Nd 17 Pr 3 Al 40 Cu 10 additional fraction. The coercivity of the magnets increases from 14.5 kOe to 31.5 kOe with increasing the additional fraction from 0 to 9 wt.%. By adding Dy 30 Nd 17 Pr 3 Al 40 Cu 10 compound to grain boundary, the Dy concentration can be reduced by 60 wt.% in comparison with the conventional method.

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