Rare earth permanent magnet and its preparation
    112.
    发明授权
    Rare earth permanent magnet and its preparation 有权
    稀土永磁铁及其制备方法

    公开(公告)号:US07985303B2

    公开(公告)日:2011-07-26

    申请号:US12913252

    申请日:2010-10-27

    IPC分类号: H01F1/057

    摘要: A rare earth permanent magnet is prepared by disposing a powdered metal alloy containing at least 70 vol % of an intermetallic compound phase on a sintered body of R—Fe—B system, and heating the sintered body having the powder disposed on its surface below the sintering temperature of the sintered body in vacuum or in an inert gas for diffusion treatment. The advantages include efficient productivity, excellent magnetic performance, a minimal or zero amount of Tb or Dy used, an increased coercive force, and a minimized decline of remanence.

    摘要翻译: 通过在R-Fe-B体系的烧结体上配置含有至少70体积%的金属间化合物相的粉末状金属合金,并且将其表面上设置的粉末的烧结体加热而制备稀土永磁体 在真空中或惰性气体中进行扩散处理的烧结体的烧结温度。 优点包括有效的生产率,优异的磁性能,使用的Tb或Dy的最小或零量,增加的矫顽力和最小的剩磁衰减。

    Method for preparing permanent magnet material
    113.
    发明授权
    Method for preparing permanent magnet material 有权
    永磁材料制备方法

    公开(公告)号:US07922832B2

    公开(公告)日:2011-04-12

    申请号:US11783143

    申请日:2007-04-06

    IPC分类号: H01F1/057

    摘要: A permanent magnet material is prepared by machining an anisotropic sintered magnet body having the compositional formula: Rx(Fe1-yCoy)100-x-z-aBzMa wherein R is Sc, Y or a rare earth element, M is Al, Cu or the like, to a specific surface area of at least 6 mm−1, heat treating in a hydrogen gas-containing atmosphere at 600-1,100° C. for inducing disproportionation reaction on the R2Fe14B compound, and continuing heat treatment at a reduced hydrogen gas partial pressure and 600-1,100° C. for inducing recombination reaction to the R2Fe14B compound, thereby finely dividing the R2Fe14B compound phase to a crystal grain size ≦1 μm.

    摘要翻译: 通过机械加工具有组成式Rx(Fe1-yCoy)100-xz-aBzMa的各向异性烧结磁体,其中R是Sc,Y或稀土元素,M是Al,Cu等,制备永久磁铁材料, 至比表面积至少为6mm-1,在含氢气氛中在600-1100℃下进行热处理,用于在R2Fe14B化合物上引起歧化反应,并在降低的氢气分压下继续热处理, 600-1100℃,用于诱导与R2Fe14B化合物的复合反应,从而将R2Fe14B化合物相细分为晶粒尺寸< 1lE。

    METHOD FOR PREPARING RARE EARTH PERMANENT MAGNET MATERIAL
    116.
    发明申请
    METHOD FOR PREPARING RARE EARTH PERMANENT MAGNET MATERIAL 有权
    制备稀土永磁材料的方法

    公开(公告)号:US20090226339A1

    公开(公告)日:2009-09-10

    申请号:US11916498

    申请日:2007-03-28

    IPC分类号: B22F7/04

    摘要: A method for preparing a rare earth permanent magnet material is characterized by comprising the steps of disposing a powder mixture on a surface of a sintered magnet body of R1—Fe—B composition wherein R1 is at least one element selected from rare earth elements inclusive of Sc and Y, the powder mixture comprising a powder containing at least 0.5% by weight of M which is at least one element selected from Al, Cu, and Zn and having an average particle size equal to or less than 300 μm and a powder containing at least 30% by weight of a fluoride of R2 which is at least one element selected from rare earth elements inclusive of Sc and Y and having an average particle size equal to or less than 100 μm, and heat treating the magnet body having the powder disposed on its surface at a temperature equal to or below the sintering temperature of the magnet body in vacuum or in an inert gas, for causing at least one of M and R2 in the powder mixture to be absorbed in the magnet body. The invention provides an R—Fe—B sintered magnet with high performance and a minimized amount of Tb or Dy used.

    摘要翻译: 一种制备稀土永磁材料的方法的特征在于包括以下步骤:在R1-Fe-B组合物的烧结磁体的表面上设置粉末混合物,其中R 1是选自稀土元素中的至少一种元素,包括 Sc和Y,所述粉末混合物包含含有至少0.5重量%的M的粉末,所述M是至少一种选自Al,Cu和Zn的元素,并且具有等于或少于300μm的平均粒度和包含 至少30重量%的R 2的氟化物,其为选自包括Sc和Y的稀土元素中的至少一种元素,并且具有等于或小于100μm的平均粒度,并且对具有粉末的磁体进行热处理 在真空中或在惰性气体中的等于或低于磁体的烧结温度的温度下,在粉末混合物中使M和R2中的至少一个吸收在磁体中。 本发明提供一种具有高性能和最小量的Tb或Dy的R-Fe-B烧结磁体。

    METHOD FOR PREPARING RARE EARTH PERMANENT MAGNET MATERIAL
    118.
    发明申请
    METHOD FOR PREPARING RARE EARTH PERMANENT MAGNET MATERIAL 有权
    制备稀土永磁材料的方法

    公开(公告)号:US20090098006A1

    公开(公告)日:2009-04-16

    申请号:US11916506

    申请日:2007-03-28

    IPC分类号: B22F7/04

    摘要: A method for preparing a rare earth permanent magnet material comprises the steps of disposing a powder on a surface of a sintered magnet body of R1aTbAcMd composition wherein R1 is a rare earth element inclusive of Sc and Y, T is Fe and/or Co, A is boron (B) and/or carbon (C), M is Al, Cu, Zn, In, Si, P, S, Ti, V, Cr, Mn, Ni, Ga, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sn, Sb, Hf, Ta, or W, said powder comprising an oxide of R2, a fluoride of R3 or an oxyfluoride of R4 wherein R2, R3, and R4 are rare earth elements inclusive of Sc and Y and having an average particle size equal to or less than 100 μm, heat treating the magnet body and the powder at a temperature equal to or below the sintering temperature of the magnet body for absorption treatment for causing R2, R3, and R4 in the powder to be absorbed in the magnet body, and repeating the absorption treatment at least two times. According to the invention, a rare earth permanent magnet material can be prepared as an R—Fe—B sintered magnet with high performance and a minimized amount of Tb or Dy used.

    摘要翻译: 一种制备稀土永磁材料的方法包括以下步骤:在R1aTbAcMd组合物的烧结磁体的表面上设置粉末,其中R1是包括Sc和Y的稀土元素,T是Fe和/或Co,A 是硼(B)和/或碳(C),M是Al,Cu,Zn,In,Si,P,S,Ti,V,Cr,Mn,Ni,Ga,Ge,Zr,Nb,Mo, ,Ag,Cd,Sn,Sb,Hf,Ta或W,所述粉末包含R2的氧化物,R3的氟化物或R4的氟氧化物,其中R2,R3和R4是包括Sc和Y的稀土元素, 具有等于​​或小于100μm的平均粒度,在等于或低于磁体的烧结温度的温度下对磁体和粉末进行热处理,以便使粉末中的R2,R3和R4进行吸收处理 被吸收在磁体中,并且重复吸收处理至少两次。 根据本发明,稀土永磁材料可以制备成具有高性能和最小量的Tb或Dy的R-Fe-B烧结磁体。

    Method for preparing rare earth permanent magnet material
    120.
    发明申请
    Method for preparing rare earth permanent magnet material 有权
    稀土永磁材料的制备方法

    公开(公告)号:US20070240789A1

    公开(公告)日:2007-10-18

    申请号:US11783782

    申请日:2007-04-12

    IPC分类号: H01F1/057

    CPC分类号: H01F41/0293 H01F1/0577

    摘要: A rare earth permanent magnet material is prepared by covering a sintered magnet body of R1—Fe—B composition wherein R1 is a rare earth element, with a powder comprising at least 30% by weight of an alloy of R2aTbMcAdHe wherein R2 is a rare earth element, T is Fe and/or Co, and M is Al, Cu or the like, and having an average particle size up to 100 μm, and heat treating the powder-covered magnet body at a suitable temperature, for causing R2, T, M and A in the powder to be absorbed in the magnet body.

    摘要翻译: 稀土永磁材料通过覆盖其中R 1为稀土元素的R 1 -Fe-B组合物的烧结磁体制成,其中粉末包含 至少30重量%的R 2的合金,其中R 1,R 2,C 2, 其中R 2是稀土元素,T是Fe和/或Co,M是Al,Cu等,并且具有平均值 粒径达100μm,并在合适的温度下对粉末覆盖的磁体进行热处理,以使粉末中的R 2,T,M和A被吸收在磁体中。