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• W4380087148 abstract "Co-diffusion of heavy rare-earth elements and Co has been reported to improve the remanence and coercivity of Nd-Fe-B magnet at high temperatures without trade-off. Two low-melting point alloys Pr50Tb20Cu15Co15 and Y15Pr40Tb15Cu15Co15 were designed in this work to simultaneously enhance the remanence and coercivity at 150°C in sintered magnet by grain boundary diffusion. The remanence increased from 1.24 T to 1.28 and 1.31 T at 150°C together with the increase of coercivity from 0.3 T to 0.89 and 0.77 T after diffusion. The temperature coefficients of remanence (20–150°C) were reduced from −0.11 %/°C to −0.07 and −0.06 %/°C by Pr50Tb20Cu15Co15 and Y15Pr40Tb15Cu15Co15 respectively. The improvement of temperature coefficients is attributed to the microstructure effect without changing the Curie temperature. The low melting point of the diffusion alloys and Y are attributed to breaking the remanence–coercivity dilemma with reduced Tb and Co usage." @default.
• W4380087148 created "2023-06-10" @default.
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• W4380087148 date "2023-10-01" @default.
• W4380087148 modified "2023-09-23" @default.
• W4380087148 title "Efficient co-diffusion of Tb and Co in a sintered Nd-Fe-B magnet by low-melting point alloys" @default.
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• W4380087148 doi "https://doi.org/10.1016/j.scriptamat.2023.115600" @default.
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