Magnetic properties and microstructure of nanocomposite (La, Pr)3Fe14B ribbons by doping La element
Y. Li,
S. J. Peng,
M. Zhang,
S. H. Wang,
S. C. Zhu,
J. E. Zhang,
F. R. Shen
Affiliations
Y. Li
The State Key Laboratory of Refractories and Metallurgy, Hubei Province Key Laboratory of Systems Science in Metallurgical Process, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan, Hubei 430065, China
S. J. Peng
The State Key Laboratory of Refractories and Metallurgy, Hubei Province Key Laboratory of Systems Science in Metallurgical Process, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan, Hubei 430065, China
M. Zhang
Faculty of Science, Inner Mongolia University of Science and Technology, Inner Mongolia 014000, China
S. H. Wang
Faculty of Science, Northwestern Polytechnical University, Xi’an, Shanxi 710072, China
S. C. Zhu
The State Key Laboratory of Refractories and Metallurgy, Hubei Province Key Laboratory of Systems Science in Metallurgical Process, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan, Hubei 430065, China
J. E. Zhang
Institute of Physics, Chinese Academy of Sciences, Beijing 100010, China
F. R. Shen
Institute of Physics, Chinese Academy of Sciences, Beijing 100010, China
The research on the mixed rare earth-iron based permanent magnet compounds by doping rare earth elements in Nd-Fe-B or Pr-Fe-B permanent magnet has been a hot topic in recent years. In this paper, La doped Pr-Fe-B ((LaxPr1-x)3Fe14B, x=0, 0.3, 0.6, (La, Pr)-Fe-B) ribbons were prepared by vacuum arc melting technique and subsequently melt-spinning method at the optimal quenching speed. The microstructure, phase distribution and magnetic properties of the nanocomposite magnets were investigated. It is found that the samples present 2:14:1 main phase, La2O3 phase and minor α-Fe phase. No excess amorphous phase is observed, indicating that 20 m/s is an optimization of preparation condition to fabricate the (La, Pr)-Fe-B ribbons in this work. The EBSD results reveal that La-rich phases distribute mostly over the grain boundary. The substitution of La for Pr in Pr-Fe-B has some influence on the coercivity, but little on the saturation magnetization. This is thought to be related with the agglomeration of rare earth-rich intermetallic phase. We hope that this work can provide new ideas in the exploration of mixed rare earth-iron based permanent magnet compounds, which possess a cost advantage and a promising potential for practical applications.
