PERMANENT MAGNET, MOTOR AND POWER GENERATOR

摘要

Provided is a high-performance permanent magnet. The permanent magnet has a composition represented by a composition formula RpFeqMrCutCo100-p-q-r-t [wherein: R represents at least one element selected from rare earth elements; M represents at least one element selected from Zr, Ti and Hf; p is a number (atomic %) satisfying 10.5≤p≤12.5; q is a number (atomic %) satisfying 23≤q≤40; r is a number (atomic %) satisfying 0.88≤r≤4.5; and t is a number (atomic %) satisfying 4.5≤t≤10.7], and a metal structure comprising a cell phase that has a Th2Zn17-type crystalline phase, a cell wall phase that is formed so as to separate the Th2Zn17-type crystalline phase, an M-rich platelet phase that is formed perpendicular to the c-axis of the Th2Zn17-type crystalline phase and has a higher concentration of the element M than the cell phase, and a Cu-rich platelet phase that is formed along the M-rich platelet phase and has a higher Cu concentration than the cell phase.