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    RARE-EARTH NANOCOMPOSITE MAGNET
    2.
    发明申请
    RARE-EARTH NANOCOMPOSITE MAGNET 有权
    稀土纳米复合磁体

    公开(公告)号：US20150008998A1

    公开(公告)日：2015-01-08

    申请号：US14368541

    申请日：2012-12-27

    申请人： Hidefumi Kishimoto ,  Noritsugu Sakuma ,  Masao Yano ,  Weibin Cui ,  Yukiko Takahashi ,  Kazuhiro Hono

    发明人： Hidefumi Kishimoto ,  Noritsugu Sakuma ,  Masao Yano ,  Weibin Cui ,  Yukiko Takahashi ,  Kazuhiro Hono

    IPC分类号： H01F7/02 ,  H01F1/03

    CPC分类号： H01F7/02 ,  C22C38/005 ,  H01F1/0311 ,  H01F10/126

    摘要： The invention provides a nanocomposite magnet, which has achieved high coercive force and high residual magnetization. The magnet is a non-ferromagnetic phase that is intercalated between a hard magnetic phase with a rare-earth magnet composition and a soft magnetic phase, wherein the non-ferromagnetic phase reacts with neither the hard nor soft magnetic phase. A hard magnetic phase contains Nd2Fe14B, a soft magnetic phase contains Fe or Fe2Co, and a non-ferromagnetic phase contains Ta. The thickness of the non-ferromagnetic phase containing Ta is 5 nm or less, and the thickness of the soft magnetic phase containing Fe or Fe2Co is 20 nm or less. Nd, or Pr, or an alloy of Nd and any one of Cu, Ag, Al, Ga, and Pr, or an alloy of Pr and any one of Cu, Ag, Al, and Ga is diffused into a grain boundary phase of the hard magnetic phase of Nd2Fe14B.

    摘要翻译： 本发明提供一种纳米复合磁体，其具有高的矫顽力和高剩余磁化强度。 磁体是插入硬磁相与稀土磁体组合物和软磁相之间的非铁磁相，其中非铁磁相与硬磁相和软磁相都不起作用。 硬磁相包含Nd2Fe14B，软磁相含有Fe或Fe2Co，非铁磁相含有Ta。 含有Ta的非铁磁相的厚度为5nm以下，含有Fe或Fe2Co的软磁性相的厚度为20nm以下。 Nd，Pr或Nd，Cu，Ag，Al，Ga和Pr中的任一种的合金，或Pr，Cu，Ag，Al，Ga中的任一种的合金，扩散到 Nd2Fe14B的硬磁相。

    SINTERED BODY THAT IS PRECURSOR OF RARE-EARTH MAGNET, AND METHOD FOR PRODUCING MAGNETIC POWDER FOR FORMING THE SAME
    4.
    发明申请
    SINTERED BODY THAT IS PRECURSOR OF RARE-EARTH MAGNET, AND METHOD FOR PRODUCING MAGNETIC POWDER FOR FORMING THE SAME 审中-公开
    作为稀土磁铁的前身的烧结体及其制造用于制造磁粉的方法

    公开(公告)号：US20140238553A1

    公开(公告)日：2014-08-28

    申请号：US14350418

    申请日：2012-10-09

    申请人： Noritsugu Sakuma ,  Hidefumi Kishimoto ,  Masao Yano

    发明人： Noritsugu Sakuma ,  Hidefumi Kishimoto ,  Masao Yano

    IPC分类号： H01F1/053 ,  B22F9/06 ,  H01F41/00

    CPC分类号： H01F1/0536 ,  B22F9/008 ,  B22F9/04 ,  B22F9/06 ,  B22F2009/048 ,  C22C33/0278 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0571 ,  H01F1/0577 ,  H01F41/00 ,  H01F41/0266

    摘要： Provided are a sintered body for forming a rare-earth magnet with a high degree of orientation and high remanent magnetization, and a method for producing magnetic powder for forming the sintered body. A sintered body S that is a precursor of a rare-earth magnet, the sintered body S including crystal grains g2 of an Nd—Fe—B-based main phase with a nanocrystalline structure, and a grain boundary phase around the main phase, and the rare-earth magnet being adapted to be formed by applying hot deformation processing to the sintered body S for imparting anisotropy thereto and further diffusing an alloy for improving coercivity therein. Each crystal grain g2 that forms the sintered body S has a planar shape that is, when viewed from a direction perpendicular to an easy direction of magnetization (i.e., a c-axis direction), a rectangle having sides in the c-axis direction and sides in a direction (i.e., an a-axis direction) that is perpendicular to the c-axis direction, or a shape that is close to the rectangle.

    摘要翻译： 提供一种用于形成具有高取向度和高剩余磁化强度的稀土类磁体的烧结体，以及用于制造用于形成烧结体的磁性粉末的方法。 作为稀土类磁体的前体的烧结体S，包含具有纳米晶体结构的Nd-Fe-B系主相的晶粒g2和主相周围的晶界相的烧结体S，以及 通过对烧结体S进行热变形处理以赋予其各向异性并进一步扩散用于提高矫顽力的合金，适合形成稀土类磁铁。 形成烧结体S的每个晶粒g2具有从与磁化方向垂直的方向（即c轴方向）观察时的平面形状，具有在c轴方向上具有侧面的矩形， 在与c轴方向垂直的方向（即，a轴方向）的侧面或靠近矩形的形状。

    METHOD FOR PRODUCING RARE EARTH MAGNETS, AND RARE EARTH MAGNETS
    6.
    发明申请
    METHOD FOR PRODUCING RARE EARTH MAGNETS, AND RARE EARTH MAGNETS 有权
    生产稀土磁铁的方法和稀土磁铁

    公开(公告)号：US20140191833A1

    公开(公告)日：2014-07-10

    申请号：US14240133

    申请日：2012-08-22

    申请人： Noritsugu Sakuma ,  Hidefumi Kishimoto

    发明人： Noritsugu Sakuma ,  Hidefumi Kishimoto

    IPC分类号： H01F1/057 ,  H01F41/02

    CPC分类号： H01F1/057 ,  B22F2998/10 ,  C21D2201/03 ,  C22C38/002 ,  C22C38/005 ,  C22C38/10 ,  C22C2202/02 ,  H01F1/0577 ,  H01F1/0579 ,  H01F41/0293 ,  B22F2009/048 ,  B22F3/10 ,  B22F2003/248

    摘要： A method for producing a nanocrystalline rare earth magnet having a grain and a grain boundary phase includes: quenching a melt of a rare earth magnet composition to form a quenched thin ribbon having a nanocrystalline structure; sintering the quenched thin ribbon to obtain a sintered body; heat treating the sintered body at a temperature which is higher than a lowest temperature in a first temperature range where the grain boundary phase diffuses or flows, and which is lower than a lowest temperature in a second temperature range where the grain becomes coarse; and quenching the heat treated sintered body to 200° C. or less at a cooling speed of 50° C./min or more.

    摘要翻译： 一种具有晶界和晶界相的纳米晶体稀土磁体的制造方法，其特征在于，使稀土类磁体组合物的熔融物淬火，形成具有纳米晶体结构的骤冷薄带; 烧结淬火的薄带以获得烧结体; 在晶界相扩散或流动的第一温度范围内，在比最低温度高的温度下对烧结体进行热处理，该温度低于晶粒变粗的第二温度范围内的最低温度; 并以50℃/分钟以上的冷却速度将热处理烧结体淬火至200℃以下。