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    R-T-B BASED SINTERED MAGNET
    1.
    发明申请
    R-T-B BASED SINTERED MAGNET 审中-公开
    基于R-T-B的烧结磁体

    公开(公告)号：US20160086701A1

    公开(公告)日：2016-03-24

    申请号：US14889069

    申请日：2014-07-03

    Applicant: TDK CORPORATION

    Inventor： Masashi MIWA ,  Haruna NAKAJIMA ,  Koji MITAKE ,  Chikara ISHIZAKA

    IPC: H01F1/01 ,  H02K1/02

    CPC classification number: H01F1/01 ,  H01F1/0577 ,  H02K1/02 ,  H02K1/278

    Abstract: An R-T-B based sintered magnet having R2T14B crystal grains and a grain boundary formed by two or more adjacent R2T14B crystal grains. An R—Co—Cu—N concentrated part whose concentrations of R, Co, Cu and N are respectively higher than those in the R2T14B crystal grains may be in the grain boundary. An R—O—C concentrated part or an R—O—C—N concentrated part may be further provided in the grain boundary.

    Abstract translation: 具有R2T14B晶粒的R-T-B系烧结磁体和由两个以上相邻的R2T14B晶粒形成的晶界。 R，Co，Cu和N的浓度分别高于R2T14B晶粒中的R-Co-Cu-N浓缩部分可能在晶界。 可以在晶界中进一步提供R-O-C浓缩部分或R-O-C-N浓缩部分。

    R-T-B BASED SINTERED MAGNET AND ROTATING MACHINE
    2.
    发明申请
    R-T-B BASED SINTERED MAGNET AND ROTATING MACHINE 审中-公开
    R-T-B型烧结磁铁和旋转机

    公开(公告)号：US20160163435A1

    公开(公告)日：2016-06-09

    申请号：US14906682

    申请日：2014-08-08

    Applicant: TDK CORPORATION

    Inventor： Masashi MIWA ,  Haruna NAKAJIMA ,  Isao KANADA

    IPC: H01F1/053

    CPC classification number: H01F1/0536 ,  H01F1/0577 ,  H01F41/0293

    Abstract: The present invention provides an R-T-B based sintered magnet having excellent corrosion resistance together with good magnetic properties. The R-T-B based sintered magnet contains R2T14B crystal grains, wherein, an R—Ga—Co—Cu—N concentrated part exists in a grain boundary formed between or among two or more adjacent R2T14B crystal grains, and the concentrations of R, Ga, Co, Cu and N in the R—Ga—Co—Cu—N concentrated part are higher than those in the R2T14B crystal grains respectively.

    Abstract translation: 本发明提供了具有优异的耐腐蚀性和良好磁性的R-T-B系烧结磁体。 RTB型烧结磁体含有R2T14B晶粒，其中R-Ga-Co-Cu-N浓度部分存在于两个或更多相邻的R2T14B晶粒之间形成的晶界中，R，Ga，Co的浓度 ，R-Ga-Co-Cu-N浓缩部分的Cu和N分别高于R2T14B晶粒中的Cu和N。

    R-T-B BASED SINTERED MAGNET
    3.
    发明申请
    R-T-B BASED SINTERED MAGNET 审中-公开
    基于R-T-B的烧结磁体

    公开(公告)号：US20160225501A1

    公开(公告)日：2016-08-04

    申请号：US15015462

    申请日：2016-02-04

    Applicant: TDK CORPORATION

    Inventor： Masashi MIWA ,  Takurou IWASA ,  Haruna NAKAJIMA

    IPC: H01F1/08

    CPC classification number: H01F1/086 ,  H01F1/0577

    Abstract: The present invention provides an R-T-B based sintered magnet having an R-T-B based compound as main phase grains, wherein, the content of Zr contained in the R-T-B based sintered magnet is 0.3 mass % to 2.0 mass %, the main phase grains have Zr, and the R-T-B based sintered magnet have main phase grains with the mass concentration of Zr at the edge portion of the main phase grain being 70% or less of that at the central portion of the main phase grain at the cross-section of the main phase grain.

    Abstract translation: 本发明提供一种RTB型烧结磁体，其具有RTB系化合物作为主相晶粒，其中，RTB系烧结磁体中所含的Zr的含量为0.3质量％〜2.0质量％，主相晶粒为Zr， RTB型烧结磁体具有在主相晶粒边缘部分的质量浓度为Zr的主相晶粒比主晶粒截面的主晶粒中心部分处的主相晶粒的70％以下。

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