Microstructure and magnetic properties of anisotropic Nd–Fe–B magnets produced by spark plasma sintering technique
作者： M. Yue , M Tian , J.X. Zhang , D.T. Zhang , P.L. Niu
DOI: 10.1016/J.MSEB.2005.11.010
关键词: Phase (matter) 、 Remanence 、 Magnet 、 Microstructure 、 Composite material 、 Materials science 、 Metallurgy 、 Hot pressing 、 Grain boundary 、 Spark plasma sintering 、 Coercivity
摘要: Abstract Bulk anisotropic Nd–Fe–B magnets were synthesized by hot pressing and subsequent deforming melt-spun ribbons using spark plasma sintering (SPS) technique. Influences of grains morphology Nd-rich intergranular phase distribution on magnetic properties both investigated. Compared with starting ribbons, randomly oriented Nd 2 Fe 14 B in increased their average size from 40 to 100 nm, which led a slightly reduction coercive force the magnets. After deformation, interior consisted well-aligned platelet shaped 80 nm thickness 200–500 nm length. On other hand, most redistributed grain boundaries triple junctions grains. The resultant exhibited remanence (Br) 1.34 T, (Hci) 512 kA/m, maximum energy product ((BH) max ) 280 kJ/m 3 .
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