Permanent magnets
    21.
    发明授权
    Permanent magnets 失效
    永磁体

    公开(公告)号:US5022939A

    公开(公告)日:1991-06-11

    申请号:US346457

    申请日:1989-05-02

    IPC分类号: B22F9/00 H01F1/057

    摘要: A permanent magnet material having high coercivity and energy product is provided which contains rare earth elements, boron, at least one element of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W, optional nickel, and a balance of Fe or Fe and Co, and consists of a primary phase of substantially tetragonal grain structure, or a mixture of such a primary phase and an amorphous or crystalline rare earth element-poor auxiliary phase wherein the volume ratio of auxiliary phase to primary phase has a specific relationship to other parameters.

    摘要翻译: 提供了具有高矫顽力和能量积的永磁材料,其含有稀土元素,硼,Ti,V,Cr,Zr,Nb,Mo,Hf,Ta和W中的至少一种元素,任选的镍,余量为 Fe或Fe和Co,并且由基本上四边形晶粒结构的主相或这种初级相和无定形或结晶的稀土元素贫乏的辅助相的混合物组成,其中辅助相与主相的体积比具有 与其他参数具体关系。