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发明授权
CN106024252B R-Fe-B烧结磁体及制备方法 有权

R-Fe-B烧结磁体及制备方法
摘要：
本发明涉及R‑Fe‑B烧结磁体及制备方法。本发明提供了一种R‑Fe‑B烧结磁体，其基本上由12‑17at％的Nd、Pr和R、0.1‑3at％的M1、0.05‑0.5at％的M2、4.8+2×m至5.9+2×m at％的B及余量的Fe构成，该烧结磁体含有R2(Fe,(Co))14B金属间化合物作为主相，且具有由晶界相被覆主相的核/壳结构。该烧结磁体具有小于6μm的平均晶粒尺寸，大于98％的晶体取向和大于96％的磁化率，且呈现出至少10kOe的矫顽力，尽管为低或零含量的Dy、Tb和Ho。
摘要（英）：

The invention provides an R-Fe-B sintered magnet consisting essentially of 12-17 at% of Nd, Pr and R, 0.1-3 at% of M 1 , 0.05-0.5 at% of M 2 , 4.8+2*m to 5.9+2*m at% of B, and the balance of Fe, containing R 2 (Fe,(Co)) 14 B intermetallic compound as a main phase, and having a core/shell structure that the main phase is covered with a grain boundary phases. The sintered magnet has an average grain size of less than 6 µm, a crystal orientation of more than 98%, and a degree of magnetization of more than 96%, and exhibits a coercivity of at least 10 kOe despite a low or nil content of Dy, Tb, and Ho.

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