| 摘要 |
An object of the present invention is to provide an Fe-B-R permanent magnet that exhibits stabilized high magnetic properties, wear resistance, electrical insulating performance, and corrosion resistance and shows minimized deterioration from the initial magnetic properties when exposed for an extended time to atmospheric conditions of a temperature of 80 DEG C and relative humidity of 90%, by providing a coating film having outstanding adhesion with the Fe-B-R permanent magnet and improved wear resistance and corrosion resistance. After cleaning the surface of the permanent magnet body by ion sputtering or the like, an Al or Ti coating film is formed on the surface of that magnet body by a vapor film-forming method such as ion plating, and then an aluminum oxide coating film is formed by a vapor film-forming method such as ion plating while introducing either simple O2 gas or a rare gas containing O2. When that is done, the adhesiveness with the coating film is sharply improved and outstanding corrosion resistance properties are realized. Thus, an Fe-B-R permanent magnet is obtained which exhibits stabilized magnetic properties due to the anticorrosive, wear-resistant, and electrically insulating properties of the anticorrosive metallic coating film applied. |
