Property enhancement for hot deformed Fe-Nd-B magnets by modification of composition of the Nd-rich phase

The magnetic properties of hot pressed and die-upset forged Fe-Nd-B magnets were modified by addition of Cu or Zn. The additional elements caused a substantial increase of coercivity without remarkable changes of remanence and maximum energy product. A small reduction of the mean grain size and improvement of the temperature characteristics for the copper containing samples was observed. A high Cu content within the Nd-rich phase, resulting in a change of the physical properties of this phase, was demonstrated and discussed.<
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