The br ( bh ) max of the binary composite bonded magnets and its single component obey the law of dilution . the interaction between magnetic particles is stronger when smco is compounded with other three permanent magnetic materials 复合粘结永磁材料的br 、 ( bh ) max与单个永磁材料的性能呈简单的稀释规律； smco和其它三种永磁材料复合时，磁粉之间的相互作用较强。
