PURPOSE: To improve significantly the corrosion resistance of a rare earth magnet and to manufacture the product of the magnet, which is stable in quality in a long-term manner, by a method wherein hetero metal films are formed on one part or the whole body of the surface of rare earth transition metal alloy powder and thereafter, this powder is blended with a resin material to form into a compound and the compound is molded and magnetized.
CONSTITUTION: Hetero metal films, such as an Ni film, a Co film, an Au film and a Pd film, are formed on one part or the whole body of the surface of rare earth magnet material alloy powder, such as Sm-Co, Nd-Fe or Pr-Fe rate earth magnet material alloy powder, by an electro-less plating method or the like. After that, this powder is blended with an epoxy resin material or the like to form into a compound and the compound is molded, magnetized and is formed into a rare earth magnet product of an arbitrary form. Thereby, the corrosion resistance of a rare earth magnet, which is used as the product, can be significantly improved. Moreover, a reduction in the manufacturing cost of the magnet becomes possible.
YOTSUYA SHINICHI
SHIMODAIRA KENICHI
