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http://dx.doi.org/10.4283/JMAG.2017.22.1.060

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

Zhao, Zeng-ru (School of Science, Inner Mongolia University of Science & Technology)
Wang, Xin (School of Science, Inner Mongolia University of Science & Technology)
Zhang, Xue-feng (School of Science, Inner Mongolia University of Science & Technology)
Ma, Qiang (School of Science, Inner Mongolia University of Science & Technology)
Liu, Yan-li (School of Science, Inner Mongolia University of Science & Technology)
Li, Yong-feng (School of Science, Inner Mongolia University of Science & Technology)
Liu, Fei (School of Science, Inner Mongolia University of Science & Technology)
Wang, Gao-feng (Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science & Technology)
Publication Information
Journal of Magnetics / v.22, no.1, 2017 , pp. 60-64 More about this Journal
Abstract
Mischmetal of Bayan Obo ore was utilized to prepare the high performance $(Pr_{7.34}Nd_{21.86})_{1-x}MM_xFe_{68.7}Al_{0.1}Cu_{0.12}Co_{0.88}B$ ribbons using melt-spinning method. Phase composition and magnetic properties were investigated at room temperature. The ribbons mainly consist of $R_2Fe_{14}B$ 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 $B_r=7.38kGs$, $H_{cj}=13.66kOe$, $(BH)_{max}=11.81MGOe$. Henkel plots were applied to demonstrate the exchange coupling interaction between grains.
Keywords
permanent magnets; mischmetal; $R_2Fe_{14}B$; magnetic properties;
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