| 摘要 |
PURPOSE:To enhance coercive force and to improve long-term reliability by a method wherein low melting point metal powder is added to the alloy powder, having specific particle diameter and the compound of specific crystal structure as the main phase, which is mainly composed of rare earth metal, Fe and N. CONSTITUTION:This manufacturing method is the method in which rare earth bonded magnet is formed as follows: metal powder, consisting of at least a kind selected from Sn, Zn, Pb, In, Al and Mg, is mixed into alloy powder of 20 to 150mum in average particle diameter having rare earth metal, Fe and N as the main component, and also having a Th2Zn17 or ThMn12 type crystal structure compound as the main phase. After the above-mentioned mixed powder has been compression-molded, a heat treatment is conducted in the temperature range of 100 to 600 deg.C. As a result, sufficient coercive force can be ensured even when coarse powder is used, and a rare earth bonded magnet, having excellent long-term reliability, can be obtained. |
