| 简介 |
Disclosed is a rare earth sintered magnet which is improved in adhesion strength between the magnet main body and a protective film. Specifically disclosed is a rare earth sintered magnet comprising a magnet main body which is composed of a sintered body containing a rare earth element and a protective film formed on the surface of the magnet main body. The ratio "Rz/D50" between the average crystal grain size (D50) of the magnet main body and the 10-point average surface roughness (Rz) of the magnet main body on which the protective film is formed is set at not less than 0.20 and not more than 10.00. Consequently, the adhesion strength of the protective film can be as high as 100 N/m or more, and the rare earth sintered magnet can have excellent corrosion resistance. |
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