Journal of Applied Physics · 2012 · 14 citations · 11 references
Natural SciencesMaterials EngineeringMaterials ScienceMagnetic MaterialsMetallic MaterialsMetallurgyAlloysFerromagnetic MaterialsFerromagnetismMagnetic CharacterizationMagnetic Properties Of SolidsPermanent MagnetsCoercivityFerrite MagnetsMagnetic CoercivityMicrostructureNdfeb MagnetsRare-earth Permanent MagnetsRare-earth-free Permanent MagnetsSintered Magnets
The purpose of this study was to save heavy rare earth Dy in NdFeB production. By ways of optimizing preparation process and replacing Nd with Pr, Dy-free magnet with high coercivity was successfully prepared, the nominal composition is Pr14B6Co2.2Cu0.2Al1Fe76.7 (at %). The effect of Pr on magnetic performance and microstructure of the magnet were investigated systemically, alloy Nd13.65B6Co2.2Cu0.2Al1Fe76.9 (at %) was prepared by the same preparation process as comparison. The results indicated that magnet Pr14B6Co2.2Cu0.2Al1Fe76.7 has much higher coercivity than that of magnet Nd13.65B6Co2.2Cu0.2Al1Fe76.9. Microstructure investigation showed that the presence of small grains, thin and smooth RE-rich film, associated with higher coercivity.
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Study of high-coercivity sintered NdFeB magnets
Guohua Bai, Rui Gao, Yuan Sun et al. · Journal of Magnetism and Magnetic Materials · 2006 · 171 citations
Natural Sciences, Materials Engineering, Materials Science +12