公开(公告)号：US06368551B1

公开(公告)日：2002-04-09

申请号：US09641136

申请日：2000-08-16

申请人： Shigenobu Sekine ,  Yuko Kawasaki ,  Yoshiki Kuwabara ,  Hiroji Sato ,  Minoru Narita ,  Kazushi Suzuki ,  Koichi Tono ,  Keiji Okada ,  Kenji Sakaguchi ,  Mitsuhisa Hirata

发明人： Shigenobu Sekine ,  Yuko Kawasaki ,  Yoshiki Kuwabara ,  Hiroji Sato ,  Minoru Narita ,  Kazushi Suzuki ,  Koichi Tono ,  Keiji Okada ,  Kenji Sakaguchi ,  Mitsuhisa Hirata

IPC分类号： B22F312

CPC分类号： H01F1/0577

摘要： The method for preparation of sintered permanent magnets according to the present invention comprises the steps of: mixing fully fine powder of a crystalline mother alloy for permanent magnet containing a rare-earth element, Fe and B as the essential components with fine powder of zinc oxide, compaction molding the resulted mixture in the presence of a magnetic field, sintering the compacted mixture in vacuum to cause generation of oxygen and metallic zinc by thermal decomposition of the zinc oxide; segregation of a part of metallic component in the mother alloy at the boundary and inside of the mother alloy crystal; formation of amorphous metallic oxide by forced oxidation of the segregated metal with the generated oxygen; crystallization of the amorphous metallic oxide; formation of an epitaxial junction between the crystallized metallic oxide and the mother alloy crystal; and evaporation of the metallic zinc into the vacuum, and quenching the sintered compact.

摘要翻译： 根据本发明的烧结永磁体的制备方法包括以下步骤：将含有稀土元素，Fe和B的永磁体的结晶母合金的完全细粉末作为必要成分与氧化锌的细粉末混合 在磁场存在下压制成型所得到的混合物，在真空中烧结压实的混合物，以通过氧化锌的热分解产生氧和金属锌; 在母合金晶体的边界和内侧，母合金中的金属成分的一部分偏析; 通过用生成的氧强制氧化分离的金属形成非晶金属氧化物; 无定形金属氧化物的结晶; 在结晶的金属氧化物和母体合金晶体之间形成外延结; 并将金属锌蒸发到真空中，并淬火烧结体。