| 摘要 |
PURPOSE:To provide a manufacture of a permanent magnet in which there is no unevenness in the thickness of the film, the titanium compound film is formed uniformly on the surface, and the gas occurrence from the surface is prevented, and which can be used even in vacuum, excellent in corrosion resistance. CONSTITUTION:A permanent magnet is heated for a specified time as the preprocess of ion plating, and then H2 gas is introduced and ionized, and negative charge is applied to the heated permanent magnet so as to clean the surface of the permanent magnet, whereby the gas adsorbed by the surface of the magnet is dissociated, and the diffusion to the surface of the magnet of evaporated matter or the chemical reaction is expedited, and also the oxide layer or foreign matter at the surface is reduced and the cleaned surface is gotten, and the covering titanium compound film becomes uniform and close, and the gas occurrence from the surface of the magnet is prevented. |
