中国物理B ›› 2023, Vol. 32 ›› Issue (7): 77501-077501.doi: 10.1088/1674-1056/acd8ae

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Improvement of the microstructure and magnetic properties of (La,Ce)-Fe-B nanocrystalline ribbons

Li-Yu Lian(连李昱)1, Xiao-Wei Zhang(张晓伟)1, Ying Liu(刘颖)1,2, Jun Li(李军)1,†, and Ren-Quan Wang(王仁全)1   

  1. 1 School of Materials Science and Engineering, Sichuan University, Chengdu 610065, China;
    2 Key Laboratory of Advanced Special Material&Technology, Ministry of Education, Sichuan University, Chengdu 610065, China
  • 收稿日期:2023-03-28 修回日期:2023-05-10 接受日期:2023-05-25 出版日期:2023-06-15 发布日期:2023-07-05
  • 通讯作者: Jun Li E-mail:li_jun@scu.edu.cn
  • 基金资助:
    Project supported by the fifth batch of major scientific and technological research projects in the Panxi Experimental Zone of Sichuan Province, the new functional materials and applications of rare earth vanadium titanium (Grant No. 2020SCUNG201).

Improvement of the microstructure and magnetic properties of (La,Ce)-Fe-B nanocrystalline ribbons

Li-Yu Lian(连李昱)1, Xiao-Wei Zhang(张晓伟)1, Ying Liu(刘颖)1,2, Jun Li(李军)1,†, and Ren-Quan Wang(王仁全)1   

  1. 1 School of Materials Science and Engineering, Sichuan University, Chengdu 610065, China;
    2 Key Laboratory of Advanced Special Material&Technology, Ministry of Education, Sichuan University, Chengdu 610065, China
  • Received:2023-03-28 Revised:2023-05-10 Accepted:2023-05-25 Online:2023-06-15 Published:2023-07-05
  • Contact: Jun Li E-mail:li_jun@scu.edu.cn
  • Supported by:
    Project supported by the fifth batch of major scientific and technological research projects in the Panxi Experimental Zone of Sichuan Province, the new functional materials and applications of rare earth vanadium titanium (Grant No. 2020SCUNG201).

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摘要： The obstacles of inferior microstructure and poor magnetic properties of (La,Ce)-Fe-B type magnets stand in the way of expanding their applications. In this work, (La,Ce)-Fe-B melt-spun ribbons were prepared with different La/Ce ratios and rare earth contents. The microstructure and magnetic properties of these ribbons were investigated. With the La/Ce ratio increased, the fraction of the CeFe2 phase decreased and the β -La phase segregated among matrix grains, which deteriorated the coercivity of the ribbons. Reducing the rare earth content effectively suppressed the β -La phase and improved the proportion of the matrix phase in the ribbons. Here, the optimal alloy composite (La15Ce85)14Fe80B6 has been obtained with modified microstructure and inhibited secondary phases. Good ribbon performance was tested, with Hcj =4.51 kOe, Br =6.29 kG and (BH)max = 6.81 MGOe.

关键词: (La,Ce)-Fe-B, La/Ce ratio, rare earth content, secondary phases inhibition

Abstract: The obstacles of inferior microstructure and poor magnetic properties of (La,Ce)-Fe-B type magnets stand in the way of expanding their applications. In this work, (La,Ce)-Fe-B melt-spun ribbons were prepared with different La/Ce ratios and rare earth contents. The microstructure and magnetic properties of these ribbons were investigated. With the La/Ce ratio increased, the fraction of the CeFe2 phase decreased and the β -La phase segregated among matrix grains, which deteriorated the coercivity of the ribbons. Reducing the rare earth content effectively suppressed the β -La phase and improved the proportion of the matrix phase in the ribbons. Here, the optimal alloy composite (La15Ce85)14Fe80B6 has been obtained with modified microstructure and inhibited secondary phases. Good ribbon performance was tested, with Hcj =4.51 kOe, Br =6.29 kG and (BH)max = 6.81 MGOe.

Key words: (La,Ce)-Fe-B, La/Ce ratio, rare earth content, secondary phases inhibition

中图分类号:  (Permanent magnets)

  • 75.50.Ww
75.47.Lx (Magnetic oxides) 75.75.-c (Magnetic properties of nanostructures)