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

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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 languageEnglish
Article number07A707
JournalJournal of Applied Physics
Issue number7
Publication statusPublished - 2012 Apr 1


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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