Effect of sintering conditions on the magnetic and microstructural properties of Nd-Fe-B sintered magnets doped with DyF 3 powders

Song E. Park; Tae Hoon Kim; Seong Rae Lee; Seok Namkung; Tae Suk Jang

doi:10.1063/1.3672246

Effect of sintering conditions on the magnetic and microstructural properties of Nd-Fe-B sintered magnets doped with DyF ₃ powders

Song E. Park, Tae Hoon Kim, Seong Rae Lee, Seok Namkung, Tae Suk Jang

GREEN SCHOOL (Graduate School of Energy and Environment)

Research output: Contribution to journal › Article

18 Citations (Scopus)

Abstract

The microstructural and magnetic property changes of DyF ₃-doped (Nd _26.06, Dy _6.51)-Fe _bal -B _0.97- M _2.39 (wt.%) (M Cu, Al, Co, and Nb) sintered magnets as functions of the sintering conditions were studied. The sintering conditions for the optimum core-shell microstructure were determined. When the magnets were sintered at 1050°C for 4 h, a coercivity of 35.1 kOe was obtained without sacrificing the remanence. When the magnets were doped with DyF ₃, the formation of the RE-rich phase (Nd-Dy-O) was effectively suppressed and, hence, saving the Dy. In addition, the formation of a cubic-NdOF triple-junction phase (TJP) improves the interface uniformity and enhances the coercivity.

Original language	English
Article number	07A707
Journal	Journal of Applied Physics
Volume	111
Issue number	7
DOIs	https://doi.org/10.1063/1.3672246
Publication status	Published - 2012 Apr 1

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ASJC Scopus subject areas

Physics and Astronomy(all)

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Park, S. E., Kim, T. H., Lee, S. R., Namkung, S., & Jang, T. S. (2012). Effect of sintering conditions on the magnetic and microstructural properties of Nd-Fe-B sintered magnets doped with DyF ₃ powders. Journal of Applied Physics, 111(7), [07A707]. https://doi.org/10.1063/1.3672246

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10.1063/1.3672246