| 摘要 |
PROBLEM TO BE SOLVED: To improve the anti-corrosion of rare earth magnet, by a method wherein an Si film is formed by ion plating process on the surface of a rare earth magnet as a base metal so as to form the second layer made of an Si oxide material on this Si film. SOLUTION: The first layer made of an Si layer as for a base material is formed by ion plating process on the surface so as to form the second layer made of an Si oxide film on the first layer. The base material is either an Nd-Fe-B base sintered magnet or a bond magnet, etc., coupled with nylon. At this time, it is recommended that the surface pollution of a rare earth magnet as a base material is removed using alcohol, etc., before forming a film while in the case of the sintered magnet as the base material, and it is preferable that the vacuum degasification is performed since there is a possibility of either producing gas from inside or the decline in adherence. Furthermore, it is recommended that film thickness of the Si film formed as the first layer is 0.5-2.0 μm and that as the second layer is 1-5 μm. |
