| 摘要 |
PURPOSE:To provide a rare-earth metal and resin composite molded body which is so superior in heat resistance that the deformation due to swelling may not occur even after it has been used at a high temperature for a long time, and its production method. CONSTITUTION:The swelling of a rare-earth metal and resin composite molded body in the lapse of time is suppressed by combining a rare-earth metal powder, in which an oxide film has been formed in advance on the broken face generated due to the compression molding, with a thermosetting resin. After a solvent is added so as to mix the rare-earth metal powder and the thermosetting resin, the mixed material is press-molded into the specified shape and preheated at 150-200 deg.C for more than 10 minutes in an atmosphere containing 5-90% oxygen to produce the titled body. The preliminary formation of oxide film on the broken face of the rare-earth metal powder can efficiently prevent oxidization from progressing. Therefore, it exhibits an excellent heat resistance without any deformation in the lapse of time even after the final product has been used at a high temperature for a long time. |
