High-performance anisotropic Sm2Co17/Fe(Co) bulk nanocomposite magnets fabricated by two-step high-pressure thermal compression deformation

被引：2

作者：

Li, Tiancong ^{[1
]}

Gao, Jieqiong ^{[1
]}

Li, Xiaohong ^{[1
]}

Wang, Jinyi ^{[1
]}

Lou, Li ^{[1
]}

Hua, Yingxin ^{[1
]}

Li, Yiran ^{[1
]}

Qin, Wenyue ^{[1
]}

Guo, Defeng ^{[1
]}

Li, Wei ^{[1
]}

机构：

[1] Yanshan Univ, Ctr Extreme Deformat Res, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2024年 / 612卷

基金：

中国国家自然科学基金;

关键词：

Sm2Co17/Fe(Co) bulk nanocomposite; HPTC deformation; Microstructure; Magnetic properties; Thermal stability; PERMANENT-MAGNETS; FE;

D O I：

10.1016/j.jmmm.2024.172640

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the realm of Sm2Co17 nanocomposite magnetic materials, it remains a challenge to fabricate anisotropic magnets by forming nanocrystalline Sm2Co17 phases with strong texture, alongside soft phases of small size and high soft phase content. In this paper, we present a novel approach for fabricating anisotropic Sm2Co17/Fe(Co) nanocomposite bulk magnets with a prominent (00l) texture of the Sm2Co17 phase, the 25 wt% content of the Fe (Co) phase, and a refined grain size of 25 nm. This fabrication is achieved using a two-step high-pressure thermal compression (HPTC) deformation process. The fabricated magnets exhibit a maximum energy product [(BH)max] of 20.0 MGOe with a pronounced magnetic anisotropy (Br///Br perpendicular to = 1.23). This result is 53 % higher than the previously reported largest value [(BH)max = 13.1 MGOe] for Sm2Co17-based nanocomposites. The magnets also exhibit a low remanence temperature coefficient (alpha = -0.014 %/degrees C) and a low coercivity temperature coefficient (beta = -0.23 %/degrees C), demonstrating exceptional thermal stability. Our findings may improve the fabrication of anisotropic bulk Sm2Co17 nanostructure magnets for practical applications.

引用

页数：8

共 39 条

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