Research Status and Future Development of (Ce, La, Y)-Fe-B Permanent Magnets Based on Full High-Abundance Rare Earth Elements
Received date: 2023-03-23
Revised date: 2024-01-28
Online published: 2024-02-26
Supported by
National Natural Science Foundation of China(U21A2052);National Natural Science Foundation of China(52071143);China Postdoctoral Science Foundation(2022M720845)
The surging demand for Nd-Fe-B-based rare earth (RE) permanent magnets has led to a sharp increase in the consumption of critical RE elements, such as Nd, Pr, Dy, and Tb. As a result, the high cost of these elements has become a major issue. Judging from the perspective of economy and resource availablity, the overstock of abundant and inexpensive RE resources, including La, Ce, and Y, offers a new opportunity to develop cost-effective permanent magnets containing no critical RE elements. RE-Fe-B magnets based on full high-abundance REs, i.e., (Ce, La, Y)-Fe-B type magnets, are expected to serve as an alternative to fill the performance gap between hard ferrites and bonded Nd-Fe-B magnets. This approach can not only meet the diversified demand for permanent magnet materials in the middle- and low-end markets, but also contribute to a balanced use of RE resources. At present, however, the recognition and understanding of Ce-, La-, and Y-based RE-Fe-B permanent magnets still require further research, and the performance of these magnets in the laboratory is quite low, which makes practical applications difficult. Based on the latest domestic and overseas developments and the research results obtaned by the authors' research group, this review summarizes the research progress on Ce-, La-, and Y-based RE-Fe-B permanent magnetic alloys and associated densified magnets. The analysis highlights the magnetic properties and metallurgical behavior of rapidly quenched RE-Fe-B alloys, alloying composition design, and element interactions in multicomponent, rapidly quenched (Ce, La, Y)-Fe-B alloys. Moreover, the relationship between the preparation process, microstructure, and magnetic properties of bulk RE-Fe-B densified magnets is discussed. Finally, the improvement and future development trends of full high-abundance RE permanent magnets are also explored.
LIU Zhongwu , ZHOU Bang , LIAO Xuefeng , HE Jiayi . Research Status and Future Development of (Ce, La, Y)-Fe-B Permanent Magnets Based on Full High-Abundance Rare Earth Elements[J]. Acta Metall Sin, 2024 , 60(5) : 585 -604 . DOI: 10.11900/0412.1961.2023.00117
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