SURFACE TREATMENT OF PERMANENT MAGNET COMPRISING RARE EARTH-IRON

摘要

PURPOSE:To improve adhesion of a covering layer by coating fluororesin on the surface of a permanent magnet comprising rare earth-iron. CONSTITUTION:A permanent magnet comprising rare earth-iron is machined to given a desired shape and washed for degreasing with an organic solvent. Subsequently fluororesin is coated on the surface of the magnet by a thin film coating method such as vacuum evaporation, plasma coating, or sputtering. This method provides a better adhesion of a covering material to the surface of the magnet.