Phase structure evolution and its effect on magnetic and mechanical properties of B-doped Sm2Co17-type magnets with high Fe content

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外文摘要：The unique cellular microstructure of Fe-rich Sm2Co17-type permanent magnets is closely associated with the struc-ture of the solid solution precursor.We investigate the phase structure,magnetic properties,and mechanical behavior of B-doped Sm2Co17-type magnets with high Fe content.The doped B atoms can diffuse into the interstitial vacancy,re-sulting in lattice expansion and promote the homogenization of the phase organizational structure during the solid solution treatment in theory.However,the resulting second phase plays a dominant role to result in more microtwin structures and highly ordered 2:17R phases in the solid solution stage,which inhibits the ordering transformation of 1:7H phase during aging and affects the generation of the cellular structure,and to result in a decrease in magnetic properties,yet the interface formed between it and the matrix phase hinders the movement of dislocations and enhances the mechanical properties.Hence,the precipitation of high flexural strain grain boundary phase induced by B element doping is also a new and effective way to improve the flexural strain of Sm2Co17-type magnets.Our study provides a new understanding of the phase structure evolution and its effect on the magnetic and mechanical properties of Sm2Co17-type magnets with high Fe content.

外文关键词：

Sm2Co17-type magnetsmagnetic and mechanical properties

作者：

李耀文、刘壮、吴海辰、王芳、竺超群、谭栋梁、刘宇、羊杨、张明晓、陈仁杰、闫阿儒

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作者单位：

Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education & School of Chemistry and Materials Science,Shanxi Normal University,Taiyuan 030032,China

CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets,Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China

CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets,Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo,315201,China

University of Chinese Academy of Sciences,Beijing,100049,China

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基金：

National Key R&D Program of ChinaNational Key R&D Program of ChinaScience and Technology Innovation 2025 Major Project of NingboZhejiang Provincial Natural Science Foundation Youth Original ProjectKey R&D Program of Shanxi ProvinceNingbo Natural Science Foundation

项目编号：

2021YFB35031022022YFB35053012022Z204LDQ24E0100012023020502010142021J216

出版年：

2024

DOI：

10.1088/1674-1056/ad5535

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

年,卷(期)：2024.33(9)