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公开(公告)号：US20240212898A1
公开(公告)日：2024-06-27
申请号：US18486440
申请日：2023-10-13
发明人： Yang LUO , Ze ZHANG , Zilong WANG , Yuanfei YANG , Wenlong YAN , Dunbo YU , Tianhao LI , Wenjian YAN , Tengfei HU
CPC分类号： H01F1/0578 , H01F1/0558 , H01F41/0266 , H01F41/028 , H02K15/03
摘要： Disclosed are a gradient ring-shaped bonded magnet and a preparation method therefor, and a motor. The gradient ring-shaped bonded magnet includes: a magnet body and at least one reinforcement layer. The magnet body is a ring-shaped cylinder; the reinforcement layer is in pressing fit with a surface of the magnet body; a material of the magnet body is a first permanent magnet, and a material of the reinforcement layer is a second permanent magnet; and the coercivity property, the remanence property and/or the maximum working temperature of the second permanent magnet are/is higher than those of the first permanent magnet.
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公开(公告)号：US20200263280A1
公开(公告)日：2020-08-20
申请号：US16791088
申请日：2020-02-14
发明人： Yang LUO , Xiao LIN , Guiyong WU , Jiajun XIE , Zilong WANG , Wenlong YAN , Zhongkai WANG , Dunbo YU
摘要： The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05≤x≤0.4, 7≤a≤13, 0≤b≤3, 5≤c≤20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.
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