| 摘要 |
PURPOSE:To perform pulverization more simply and also low in degree of oxidation by finely pulverizing low fusing point FE-TM alloy and RE-TM-B alloy under the mixture of the RE2TM14B1-phase powder. CONSTITUTION:If the fine pulverization of RE-TM alloy, which is abundant in ductility and is hard to pulverize and besides which is lower in fusing point than RE2TM14B1 phase and is large in RE/TM ratio, or RE-TM-B alloy is performed under the existence of RE2TM14B1, the harder RE2TM14B1 phase works as an assistant for fine pulverization, so the pulverization becomes easy. Moreover, average concentration of RE element falls, and the activity of powder at large drops, so oxidizing property is weakened, consequently the handling of fine pulverization becomes easy, and also the concentration of oxygen at the time of being made a magnet is reduced, so the property of a product, especially, the coercive force can be improved. In a word, not only the pulverization efficiency of the RE-TM alloy or RE-TM-B alloy higher in RE concentration than RE2TM14B1 can be elevated, but also the danger of ignition falls, so the handling becomes easy, and the concentration of oxygen of a magnet can be maintained low, therefore the magnetic property can be improved. |
