Permanent magnetic materials of the Fe-B-R tpe, containing Ce and Nd and/or Pr, and process for manufacture

摘要

A Fe-B-R type permanent magnetic, consisting of: 13-19 atomic % R, where R consists essentially of a mixture of rare earth elements Nd and/or Pr, and Ce, where Ce is between 0.2 and 5.0 wt. % of R; 4-20 atomic % B, and the balance comprising Fe. In a preferred aspect, R comprises 15-16 atomic % B; of which Ce is approximately 0.5% and the remaining rare earths Pr and Nd are in a ratio of 3:1. A process of producing a Fe-B-R permanent magnet as described above, and a Fe-B-R magnetic material made by such process.