通过掺杂镓优化 B-lean 热变形钕铁硼磁体的微观结构并改善其磁性能

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2025-01-24 DOI:10.1016/j.intermet.2025.108676

Jianming Li , Qingzheng Jiang , Weiguo Wei , Song Fu , Mengping Kan , Zixiang Mo

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Optimized microstructure and improved magnetic properties of B-lean hot deformed Nd-Fe-B magnets by Ga doping

Ga doping is beneficial to enhance the magnetic properties of Nd-Fe-B magnets, but the role of Ga in B-lean hot-deformed Nd-Fe-B magnets is still not clear. In this paper, B-lean hot-deformed Nd-Fe-B magnets with varying Ga content were prepared using spark plasma sintering (SPS) technique, and the effect of Ga doping on the phase composition, magnetic properties and microstructure of hot-deformed magnets were systematically investigated. The results show that both the remanent magnetization and coercivity of the magnets show a tendency of increasing and then decreasing with the increase of Ga content. Excellent magnetic properties of J_r = 14.20 kGs, H_cj = 12.78 kOe, and (BH)_max = 45.14 MGOe were obtained for Nd_29.89Fe_balGa_0.84Co_5.93B_0.89 magnet. In B-lean hot-deformed magnets, the increase of Ga content is favorable to the formation of Nd₆₍Fe, Co)₁₃Ga phase, improving the continuity of the grain boundary phase and reducing the RE-rich agglomerated region, as well as facilitating the grain refinement.

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.