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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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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	张洋湖
	贺洪江
	左志军
	史荣莹
	李建军
	赵立新
	黄光伟
	郑立允

关键词 ： Nd-Fe-B, Ni掺杂, 磁性能, 抗弯强度, 微观结构

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.

Key words： Nd-Fe-B Ni doping magnetic property bending strength microstructure

收稿日期: 2020-11-16 出版日期: 2021-03-22

ZTFLH:

TM273

基金资助: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)

通讯作者: 郑立允,教授,博士。电话：0310-3967971;E-mail: zhengliyun@126.com

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, 26(1): 40-46.
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. Materials Science and Engineering of Powder Metallurgy, 2021, 26(1): 40-46.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2021/V26/I1/40

[1] 刘荣明. 中国稀土永磁产业现状及技术发展新动向[J]. 新材料产业, 2013, 1(6): 25-32.
LIU Rongming.Current situations and new trends in technological development of rare earth permanent magnet industry in China[J]. Advanced Materrials Industry, 2013, 1(6): 25-32.
[2] 陈云志, 刘宇晖, 王志坚, 等. 稀土含量对烧结NdFeB磁体磁性能及力学性能的影响[J]. 稀有金属与硬质合金, 2017, 45(4): 52-55.
CHEN Yunzhi, LIU Yuhui, WANG Zhijian, et al.Effects of rare earth content on the mechanical and magnetic properties of sintered NdFeB magnets[J]. Rare Metals and Cemented Carbides, 2017, 45(4): 52-55.
[3] LIN M, WANG H, ZHENG J, et al.Effects of Fe fine powders doping on hot deformed NdFeB magnets[J]. Journal of Magnetism and Magnetic Materials, 2015, 379: 90-94.
[4] LIU X, ZHANG Y, ZHANG P, et al.Microstructure evolution of Dy₆₉Ni₃₁-added Nd-Fe-B sintered magnets during annealing[J]. Journal of Magnetism and Magnetic Materials, 2019, 486: 1-8.
[5] ZHANG Z, JIN J, LIANG L, et al.High-performance Nd-Fe-B sintered magnets via co-doping high-melting-point Zr and low-melting-point Dy_71.5Fe_28.5[J]. Journal of Magnetism and Magnetic Materials, 2019, 487: 1-6.
[6] PANDIAN S, CHANDRASEKARAN V, MARKANDEYULU G, et al.Effect of Al, Cu, Ga, and Nb additions on the magnetic properties and microstructural features of sintered NdFeB[J]. Journal of Applied Physics, 2002, 92(10): 6082-6086.
[7] JIANG J, ZENG Z, WU J, et al.Influence of alloying elements on mechanical properties and microstructures of sintered Nd-Fe-Co-B magnet[J]. Journal of Magnetism and Magnetic Materials, 2000, 214(1/2): 61-68.
[8] KIM J W, KIM S H, DO Kim Y.Mechanical properties of (Nd,Dy)-Fe-B magnets sintered via cyclic sintering[J]. Materials Science and Engineering: A, 2012, 535: 325-329.
[9] GARRELL M G, SHIH A J, MA B M, et al.Mechanical properties of Nylon bonded Nd-Fe-B permanent magnets[J]. Journal of Magnetism and Magnetic Materials, 2003, 257(1): 32-43.
[10] CHEN H, YANG X, SUN L, et al.Effects of Ag on the magnetic and mechanical properties of sintered NdFeB permanent magnets[J]. Journal of Magnetism and Magnetic Materials, 2019, 485: 49-53.
[11] YI P, LIN M, CHEN R, et al.Enhanced magnetic properties and bending strength of hot deformed Nd-Fe-B magnets with Cu additions[J]. Journal of Alloys and Compounds, 2010, 491(1/2): 605-609.
[12] ZHENG X, LI M, CHEN R, et al.Coercivity enhancement by inhibiting the formation of coarse grains region in hot-deformed Nd-Fe-B magnets with WC nano-particles addition[J]. Scripta Materialia, 2017, 132: 49-52.
[13] ZHENG L, FANG K, ZHAO L, et al.Mechanical and Magnetic Properties of Hot-Deformed Nd-Fe-B Magnets Doped with SiC Whiskers[J]. The Journal of the Minerals. Metals & Materials Society, 2019, 71(9): 3107-3112.
[14] CUI X G, WANG X H, YIN G C, et al.Magnetic properties and microstructure of sintered NdFeB magnets with intergranular addition of Ni powders[J]. Journal of Alloys and Compounds, 2017, 726: 846-851.
[15] TANG M, BAO X, ZHANG X, et al.Tailoring the mechanical anisotropy of sintered NdFeB magnets by PrCu grain boundary reconstruction[J]. Journal of Rare Earths, 2019, 37(4): 393-397.
[16] HEJAZI R F, HUSAIN T, KHAN F I.Landfarming operation of oily sludge in arid region-human health risk assessment[J]. Journal of Hazardous Materials, 2003, 99(3): 287-302.
[17] CUI X G, CUI C Y, CHENG X N, et al.Effects of alignment on the magnetic and mechanical properties of sintered Nd-Fe-B magnets[J]. Journal of Alloys and Compounds, 2013, 563: 161-164.
[18] LIU X, WANG X, LIANG L, et al.Rapid coercivity increment of Nd-Fe-B sintered magnets by Dy₆₉Ni₃₁ grain boundary restructuring[J]. Journal of Magnetism and Magnetic Materials, 2014, 370: 76-80.
[19] KAMB W B.Theory of preferred crystal orientation developed by crystallization under stress[J]. The Journal of Geology, 1959, 67(2): 153-170.
[20] 姜雪琦, 樊晓光, 詹梅, 等. 金属材料热变形中的塑性流动失稳研究进展[J]. 塑性工程学报, 2020, 27(7): 39-57.
JIANG Xueqi, FAN Xiaoguang, ZHAN Mei, et al.Research progress on plastic flow instability duringhot deformation of metal materials[J]. Journal of Plasticity Engineering, 2020, 27(7): 39-57.
[21] VICH Y M, SERGEEV V V, MAYSTRENKO A D, et al.Physical and mechanical properties of sintered Nd-Fe-B type permanent magnets[J]. Intermetallics, 1996, 4(8): 641-645.
[22] LIU W, WU J.Mechanical properties and fracture mechanism study of sintered Nd-Fe-B alloy[J]. Journal of Alloys and Compounds, 2008, 458(1): 292-296.