Disclosed are an R-Fe-B sintered magnet and a method for producing the same. More specifically, provided is an R-Fe-B (R=Nd, Dy, Pr, Tb, Ho, La, Ce, Sm, Gd, Er, Tm, Yb, Lu or Th) sintered magnet having a structure in which R2Fe14B crystal grains as major phases are surrounded with R-rich phases, wherein a dihedral angle between two adjacent R2Fe14B crystal grains and the R-rich phase contacting the R2Fe14B crystal grains is 70° or less in a triple junction formed by the R2Fe14B crystal grains. The sintered magnet maintains a high coercive force and exhibits improved mechanical propertiesand is thus applicable to motors or permanent magnets used at high temperatures.
展开▼
机译：公开了一种R-Fe-B烧结磁体及其制造方法。更具体地，提供一种具有以下结构的R-Fe-B（R ＝ Nd，Dy，Pr，Tb，Ho，La，Ce，Sm，Gd，Er，Tm，Yb，Lu或Th）烧结磁体。作为主要相的 2 Fe 14 B晶粒被富R相包围，其中两个相邻的R 2 Fe 14 B晶粒和与R 2 Fe 14 B晶粒接触的富R相在由B形成的三重结中为70°以下R 2 Fe 14 B晶粒。烧结磁体保持高矫顽力并表现出改善的机械性能，因此可应用于高温下使用的电动机或永磁体。
展开▼
