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公开(公告)号：US11495376B2
公开(公告)日：2022-11-08
申请号：US16612294
申请日：2018-06-20
发明人： Yang Luo , Hongbin Zhang , Zhou Hu , Dunbo Yu , Ningtao Quan , Yuanfei Yang , Wenlong Yan , Jiajun Xie
摘要： The present invention discloses rare earth-bonded magnetic powder and a preparation method therefor. The bonded magnetic powder is of a multilayer core-shell structure, and comprises a core layer and an antioxidant layer (3), wherein the core layer is formed by RFeMB, R is Nd and/or PrNd, and M is one or more of Co, Nb, and Zr; and the core layer is coated with an iron-nitrogen layer (2). In addition, the present invention also discloses the preparation method for the rare earth-bonded magnetic powder and a bonded magnet. The oxidation and corrosion of magnetic raw powder during phosphorization and subsequent treatment process are effectively prevented, thereby further improving the long-term temperature resistance and environmental tolerance of the material.
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公开(公告)号：US11802326B2
公开(公告)日：2023-10-31
申请号：US17331531
申请日：2021-05-26
发明人： Yang Luo , Yuanfei Yang , Zilong Wang , Dunbo Yu , Hongbin Zhang , Jiajun Xie , Zhou Hu , Zhongkai Wang
CPC分类号： C22C38/002 , B22F1/102 , B22F7/062 , C22C38/005 , H01F1/0558 , H01F1/0576 , H01F1/0578 , H01F41/0266 , B22F2202/05 , B22F2301/355 , C22C2202/02 , B22F2998/10 , B22F1/10 , B22F3/02 , B22F2003/248
摘要： An anisotropic bonded magnet and a preparation method thereof are provided. By stacking magnets having different magnetic properties and/or densities, the magnets in the middle have high properties and the magnets at two ends and/or the periphery have low properties, thereby compensating for a property deviation caused by a difference in pressing densities during a pressing process, and improving the property uniformity of the magnets in an axial direction. The method solves the problem of “low in the middle and high at two ends” caused by the phenomenon of non-uniform magnetic field orientation and density along a height direction during orientation and densification.
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3.发明授权公开(公告)号：US10811175B2
公开(公告)日：2020-10-20
申请号：US15796153
申请日：2017-10-27
发明人： Yang Luo , Chao Yuan , Kuo Men , Ningtao Quan , Hongbin Zhang , Wenlong Yan , Dunbo Yu , Yuanfei Yang
IPC分类号： H01F1/055 , B22F9/04 , C22C33/02 , C22C1/04 , H01F1/057 , C22C1/03 , C22C28/00 , C22C38/00 , C22C38/10
摘要： An alloy material, a bonded magnet, and a modification method of a rare-earth permanent magnetic powder are provided by the present application. A melting point of the alloy material is lower than 600° C. and a composition of the alloy material by an atomic part is RE100-x-yMxNy, wherein RE is one or more of non-heavy rare-earth Nd, Pr, Sm, La and Ce, M is one or more of Cu, Al, Zn and Mg, N is one or more of Ga, In and Sn, x=10-35 and y=1-15.
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4.发明申请公开(公告)号：US20180182517A1
公开(公告)日：2018-06-28
申请号：US15796153
申请日：2017-10-27
发明人： Yang Luo , Chao Yuan , Kuo Men , Ningtao Quan , Hongbin Zhang , Wenlong Yan , Dunbo Yu , Yuanfei Yang
摘要： An alloy material, a bonded magnet, and a modification method of a rare-earth permanent magnetic powder are provided by the present application. A melting point of the alloy material is lower than 600° C. and a composition of the alloy material by an atomic part is RE100-x-yMxNy, wherein RE is one or more of non-heavy rare-earth Nd, Pr, Sm, La and Ce, M is one or more of Cu, Al, Zn and Mg, N is one or more of Ga, In and Sn, x=10-35 and y=1-15.
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