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Effects of the Substitution of Mischmetal for PrNd on the Microstructures and Magnetic Properties of Rapidly Quenched (MM)PrNd-Fe-B
Nanocrystalline Magnets

Journal of Magnetics, Volume 22, Number 1, 31 Mar 2017, Pages 60-64
Zeng-ru Zhao (School of Science, Inner Mongolia University of Science & Technology), Xin Wang (School of Science, Inner Mongolia University of Science & Technology), Xue-feng Zhang * (School of Science, Inner Mongolia University of Science & Technology), Qiang Ma (School of Science, Inner Mongolia University of Science & Technology), Yan-li Liu (School of Science, Inner Mongolia University of Science & Technology), Yong-feng Li (School of Science, Inner Mongolia University of Science & Technology), Fei Liu (School of Science, Inner Mongolia University of Science & Technology), Gao-feng Wang (Inner Mongolia University of Science & Technology)
Abstract
Mischmetal of Bayan Obo ore was utilized to prepare the high performance (Pr7.34Nd21.86)1-xMMxFe68.7Al0.1- Cu0.12Co0.88B ribbons using melt-spinning method. Phase composition and magnetic properties were investigated at room temperature. The ribbons mainly consist of R2Fe14B phase in isotropic nanostructure. Both coercivity and maximum energy product decrease with the increase of MM content. The magnetic parameters of the ribbons with MM = 20 % in mass are Br = 7.38 kGs, Hcj = 13.66 kOe, (BH)max = 11.81 MGOe. Henkel plots were applied to demonstrate the exchange coupling interaction between grains.
Keywords: permanent magnets; mischmetal; R2Fe14B; magnetic properties
DOI: https://doi.org/10.4283/JMAG.2017.22.1.060
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