| Ni对热变形Nd-Fe-B磁体磁性能及力学性能的影响 |
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| 引用本文： | 张洋湖,贺洪江,左志军,史荣莹,李建军,赵立新,黄光伟,郑立允.Ni对热变形Nd-Fe-B磁体磁性能及力学性能的影响[J].粉末冶金材料科学与工程,2021(1). |
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| 作者姓名： | 张洋湖 贺洪江 左志军 史荣莹 李建军 赵立新 黄光伟 郑立允 |
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| 作者单位： | 河北工程大学材料科学与工程学院;河北省稀土永磁材料与应用工程研究中心;廊坊京磁精密材料有限公司;河北新四达电机股份有限公司;河北工程大学机械与装备学院 |
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| 基金项目： | 河北省科技厅中央引导地方科技发展资金项目(206Z1007G);河北省重点研发计划项目(19211008D,18211904D);河北省高等学校科学技术研究项目(QN2019040);河北省教育厅研究生示范课程项目(KCJSX2020079)。 |
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| 摘 要： | 为提高热压结合热变形工艺制备的各向异性Nd-Fe-B磁体的力学性能,向磁体中掺杂高熔点、弱磁性金属元素Ni,研究Ni含量对磁体的磁性能、力学性能以及微观结构的影响。掺杂Ni的质量分数在0~5%之间时,Nd-Fe-B复合磁体的抗弯强度先增大后减小,2%Ni含量的Nd-Fe-B复合磁体具有最高平均抗弯强度212 MPa,其最大磁能积保持在40 MGOe以上。从磁体断口形貌上看,Ni会在孔洞附近富集,强化增韧晶界相,从而提高晶界相的裂纹扩展阻力,使抗弯强度提高。
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| 关 键 词： | ND-FE-B Ni掺杂 磁性能 抗弯强度 微观结构 |
Effects of Ni on the magnetic and mechanical properties of hot-deformed Nd-Fe-B magnets |
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| ZHANG Yanghu,HE Hongjiang,ZUO Zhijun,SHI Rongying,LI Jianjun,ZHAO Lixin,HUANG Guangwei,ZHENG Liyun.Effects of Ni on the magnetic and mechanical properties of hot-deformed Nd-Fe-B magnets[J].materials science and engineering of powder metallurgy,2021(1). |
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| Authors: | ZHANG Yanghu HE Hongjiang ZUO Zhijun SHI Rongying LI Jianjun ZHAO Lixin HUANG Guangwei ZHENG Liyun |
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| Affiliation: | (College of Materials Science and Engineering,Hebei University of Engineering,Handan 056000,China;Hebei Rare Earth Permanent Magnet Materials and Applied Engineering Research Center,Handan 056000,China;Langfang Jing Magnetic Precision Materials Co.,Ltd.,Langfang 065000,China;Hebei Xinsi Da Electric Co.,Ltd.,Shijiazhuang 050000,China;College of Machinery and Equipment,Hebei University of Engineering,Handan 056000,China) |
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| Abstract: | To improve the mechanical properties of hot-pressed/hot-deformed anisotropic Nd-Fe-B magnets,high-melting-point metal element Ni with weak magnetism has been doped into the magnets.The influence of Ni on the magnetic,mechanical properties and microstuctures of the Nd-Fe-B magnets were investigated.The results show that average bending strength of the Ni-doped Nd-Fe-B magnets increases fistly and then decreases with increasing Ni mass fraction from 0 to 5%.The Nd-Fe-B magnet with 2%Ni exhibites the highest average bending strength(212 MPa),and the maximum energy product still retains at more than 40 MGOe.The morphology of the fracture surface of the magnets reveales that the enriched Ni near the pore can strengthen and toughen the grain boundary phase,therefore enhence the crack propagation resistance of grain boundary phase,and improve the bending strength of the magnets. |
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| Keywords: | Nd-Fe-B Ni doping magnetic property bending strength microstructure |
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