| 简介 |
A high performance permanent magnet is provided. The permanent magnet includes a composition represented by a composition formula : R p Fe q MCu t Co 100-p-q-r-t , and a metallic structure including cell phases having a Th 2 Zn 17 crystal phase and Cu-rich phases having higher Cu concentration than the cell phases. An average diameter of the cell phases is 220 nm or less, and in a numeric value range from a minimum diameter to a maximum diameter of the cell phases, a ratio of a number of cell phases having a diameter in a numeric value range of less than upper 20% from the maximum diameter is 20% or less of all the cell phases. |
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