张鹏杰,曹玉杰,孙威,李炳山,徐光青,魏汉中,王继全,谢光环,刘辉,王永齐,王倩

• 1:北矿磁材(阜阳)有限公司
• 2:国家磁性材料工程技术研究中心
• 3:矿冶科技集团有限公司
• 4:合肥工业大学材料科学与工程学院

摘要(Abstract)：

采用气流磨细化晶粒的方法制备了无重稀土烧结钕铁硼磁体,对比研究了无重稀土磁体与同牌号商用含重稀土磁体的磁性能、温度稳定性和微观结构。结果表明:无重稀土磁体与含重稀土磁体的常温磁性能基本相当,具有较好的常温磁性能。但是,无重稀土磁体的高温磁性能较低,抗高温退磁能力弱,温度稳定性较差。与含重稀土磁体相比,无重稀土磁体的晶界富稀土相较均匀地连续分布在主相晶粒周围,且主相晶粒相对较小,提高了磁体的矫顽力。作为非磁性连续分布的晶界富稀土相既有助于烧结磁体的致密化,又能起到去磁耦合作用。

关键词(KeyWords)： 烧结钕铁硼磁体;无重稀土;磁性能;温度稳定性;微观结构

Abstract:

Keywords:

基金项目(Foundation): 安徽省重点研究与发展计划项目“高耐蚀高丰度烧结稀土永磁材料关键制备技术研究与开发(202004a05020051);; 矿冶科技集团科研基金项目(20190898000002,02-2115)

作者(Author): 张鹏杰,曹玉杰,孙威,李炳山,徐光青,魏汉中,王继全,谢光环,刘辉,王永齐,王倩

DOI: 10.13289/j.issn.1009-6264.2021-0381

参考文献(References)：

• [1] 李卫，朱明刚.高性能金属永磁材料的探索和研究进展[J].中国材料进展，2009,28(Z2):62-73.LI Wei,ZHU Ming-gang.Research progress of high performance metallic permanent magnetic materials[J].Materials China,2009,28(Z2):62-73.
• [2] Sagawa M,Fujimura S,Togawa N,et al.New material for permanent magnets on a base of Nd and Fe (invited)[J].Journal of Applied Physics,1984,55(6):2083-2087.
• [3] 胡伯平.稀土永磁材料的现状与发展趋势[J].磁性材料及器件，2014(2):66-77.HU Bo-ping.Status and development tendency of rare-earth permanent magnet materials[J].Journal of Magnetic Materials and Devices,2014(2):66-77.
• [4] Hono K,Sepehri-Amin H.Strategy for high-coercivity Nd-Fe-B magnets[J].Scripta Materialia,2012,67(6):530-535.
• [5] 钱尼健，严长江.氧含量对Pr-Nd-Ce-Fe-B 烧结磁体性能的影响[J].磁性材料及器件，2019,50(5):14-17.QIAN Ni-jian,YAN Chang-jiang.Effect of oxygen content on the properties of sintered Pr-Nd-Ce-Fe-B magnets[J].Journal of Magnetic Materials and Devices,2019,50(5):14-17.
• [6] Wang Y L,Luo Y,Wang Z L,et al.Coercivity enhancement in NdFeB magnetic powders by Nd-Cu-Al grain boundary diffusion[J].Journal of Magnetism and Magnetic Materials,2018,458:85-89.
• [7] 吴波，邓小霞.Ho 取代对烧结NdFeB 显微结构和磁体性能的影响[J].磁性材料及器件，2019,50(5):35-38.WU Bo,DENG Xiao-xia.Influence of Ho substitution on the microstructure and properties of sintered Nd-Fe-B magnet[J].Journal of Magnetic Materials and Devices,2019,50(5):35-38.
• [8] Liu L H,Sepehri-Amin H,Ohkubo T,et al.Coercivity enhancement of hot-deformed NdFeB magnets by the eutectic grain boundary diffusion process using Nd62Dy20Al18 alloy[J].Scripta Materialia,2017,129:44-47.
• [9] Kim T H,Sasaki T T,Koyama T,et al.Formation mechanism of Tb-rich shell in grain boundary diffusion processed NdFeB sintered magnets[J].Scripta Materialia,2020,178:433-437.
• [10] Pan M X,Zhang P Y,Li X J,et al.Effect of terbium addition on the coercivity of the sintered NdFeB magnets[J].Journal of Rare Earths,2010,28:399-402.
• [11] Chen G X,Bao X Q,Lu K C,et al.Microstructure and magnetic properties of NdFeB sintered magnet by diffusing Pr-Cu-Al and Pr-Tb-Cu-Al alloys[J].Journal of Magnetism and Magnetic Materials,2019,477:17-21.
• [12] Hu Z H,Lian F Z,Zhu M G,et al.Effect of Tb on the intrinsic coercivity and impact toughness of sintered Nd-Dy-Fe-B magnets[J].Journal of Magnetism and Magnetic Materials,2008,320(11):1735-1738
• [13] 刘宇晖，欧阳宇平，朱望伟，等.铽镝铁合金制备烧结钕铁硼的研究[J].稀有金属与硬质合金，2016,44(2):46-49.LIU Yu-hui,OUYANG Yu-ping,ZHU Wang-wei,et al.Study on preparation of sintered NdFeB with TbDyFe alloy[J].Rare Metals and Cemented Carbides,2016,44(2):46-49.
• [14] Karmaker P C,Rahman M O,Dan N H,et al.Thermal behavior and magnetic properties of Nd-Fe-B based exchange spring nanocomposites Nd4-xTbxFe83.5Co5Cu0.5Nb1B6(x=0,0.2,0.4,0.6,0.8,1) melt-spun ribbons[J].Advances in Materials Physics and Chemistry,2017,7(6):223-241.
• [15] Liu X B,Altounian Z.The partitioning of Dy and Tb in NdFeB magnets:A first-principles study[J].Journal of Applied Physics,2012,111(7):07A701.
• [16] Li D,Suzuki S,Kawasaki T,et al.Grain interface modification and magnetic properties of NdFeB sintered magnets[J].Journal of Applied Physics,2008,47(10):7876-7878.
• [17] 李岩峰，赖彬，朱明刚，等.烧结钕铁硼磁体边界相的调控技术机制[J].稀有金属，2015,39(11):988-992.LI Yan-feng,LAI Bin,ZHU Ming-gang,et al.Mechanism on control technology of grain boundary phase in sintered Nd-Fe-B magnets[J].Chinese Journal of Rare Metals,2015,39(11):988-992.
• [18] 李建，张守华，陈杰，等.无重稀土烧结钕铁硼磁体的晶粒细化研究[J].金属功能材料，2018,25(2):13-19.LI Jian,ZHANG Shou-hua,CHEN Jie,et al.Study of grain refinement in Dy-free Nd-Fe-B sintered magnet[J].Metallic Functional Materials,2018,25(2):13-19.
• [19] Sepehri-Amin H,Une Y,Ohkubo T,et al.Microstructure of fine-grained NdFeB sintered magnets with high coercivity[J].Scripta Materialia,2011,65(5):396-399.
• [20] Bittner F,Woodcock T G,Schultz L,et al.Normal and abnormal grain gromassh in fine-grained NdFeB sintered magnets prepared from He jet milled powders[J].Journal of Magnetism and Magnetic Materials,2017,426:698-707.
• [21] Nakamura M,Matsuura M,Tezuka N,et al.Preparation of ultrafine jet-milled powders for NdFeB sintered magnets using hydrogenation-disproportionation-desorption-recombination and hydrogen decrepitation processes[J].Applied Physics Letters,2013,103(2):022404.
• [22] Popov A G,Gaviko V S,Shchegoleva N N,et al.Effect of addition of esters of fatty acids on the microstructure and properties of sintered NdFeB magnets produced by PLP[J].Journal of Magnetism and Magnetic Materials,2016,386:134-140.

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