Effect of preparation process on CeFe2 phase content and magnetic properties of (La, Ce)-Fe-B permanent magnetic materials

doi:10.13251/j.issn.0254-6051.2024.04.002

Abstract

Abstract: Near-equilibrium and non-equilibrium specimens with the nominal composition of (La_xCe_1-x)_3.0Fe₁₄B(x=0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35) alloy were prepared by annealing and rapid quenching, respectively. The effect of La content on the content of CeFe₂ phase and magnetic properties of the alloy was studied by means of X-ray diffraction and thermomagnetic curve analysis. The results show that the content of CeFe₂ phase in the alloy decreases monotonously with the increase of La substitution, and the non-equilibrium specimen contains less CeFe₂ phase than the near-equilibrium specimen with the same nominal composition, indicating the preparation process has a strong influence on the content of the CeFe₂ phase. With the increase of La content, the saturation magnetization, remanence and maximum magnetic energy product of the non-equilibrium specimen are improved, the coercivity increases and then decreases, which all is the result of the decrease of magnetocrystalline anisotropy field and the optimization of microstructure. In addition, it is found that La con not enter CeFe₂ phase like other rare earth metals.

Key words: high abundance rare earth, permanent magnet material, Ce-Fe-B alloy, phase composition, melt-spun ribbons, CeFe₂

CLC Number:

TM273

Dong Fuhai, Zhang Ming, Li Yongfeng. Effect of preparation process on CeFe₂ phase content and magnetic properties of (La, Ce)-Fe-B permanent magnetic materials[J]. Heat Treatment of Metals, 2024, 49(4): 8-12.

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Effect of preparation process on CeFe₂ phase content and magnetic properties of (La, Ce)-Fe-B permanent magnetic materials

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