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Magnetic Performance of (Nd,Ce)-Fe-B-type Die-upset Hybrid Magnet Composed of Melt-spun and HDDR-treated Materials
Journal of Magnetics, Volume 24, Number 4, 31 Dec 2019, Pages 616-621
Abstract
Ce-containing (Nd,Ce)-Fe-B-type hybrid magnet was fabricated by die-upset technique using two different types of materials: Ce-substituted (Nd0.55Ce0.45)15Fe72.2Co6.6Ga0.6B5.6 HDDR powder and melt-spun Nd13.6Fe73.6Co6.6Ga0.6B5.6 flakes. Magnetic performance of the hybrid magnet was superior to that of the single alloy magnet when they had identical overall composition: iHc = 6.8 kOe, Mr = 10.6 kG, and (BH)max = 19.8 MGOe for the Ce-containing hybrid magnet and iHc = 3.9 kOe, Mr = 9.8 kG, and (BH)max = 11.6 MGOe for the magnet from the single alloy HDDR powder. Die-upset hybrid magnet consisting of two constituent materials showed smooth and singlematerial- like demagnetization behavior, and this was attributed to the exchange interaction between neighbouring grains in the magnet.
Keywords: Nd-Fe-B magnet; Ce-substitution; hybrid magnet; die-upset magnet
DOI: https://doi.org/10.4283/JMAG.2019.24.4.616
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