| 摘要 |
PURPOSE:To provide a highly reliable R-TM-B permanent magnet having improved corrosion-proof property. CONSTITUTION:The title permanent magnet is composed of three different type metal-coated layers which are laminated in the order of electrochemical nobility on the title R-TM-B permanent magnet composed of R (R indicates the combination of one or two or more kinds of rare earth elements containing Y) of 5 to 40wt.%, TM (TM indicates a transition metal having Fe and Co as the center, and a part of which may be replaced by a metal element or a non-metal element) of 50 to 90wt.%, and B (boron) of 0.2 to 8wt.%. |
