41 MG-Oe Nd-Fe-B magnet produced with the REMAFS Process

Image of the Na-Nd-F (top-left); Sample of metal produced with metal from the REMAFS process (top-right); Hysteresis loops made with metal from the REMAFS process (bottom-right) and commercial metal (bottom-left).
Image of the Na-Nd-F (top-left); Sample of metal produced with metal from the REMAFS process (top-right); Hysteresis loops made with metal from the REMAFS process (bottom-right) and commercial metal (bottom-left).

CMI researchers from Ames National Laboratory and Terves conducted the activity for this highlight

Innovation 
CMI researchers have demonstrated a 41 MGOe Nd-Fe-B magnet fabrication using the REMAFS (Rare Earth Metals via Alternative Fluoride Salt) process.

Achievement
The REMAFS process is based on the metallothermic reduction of Na-RE-F or similar salts, produced without the use or generation of HF. The REMAFS is of an equivalent magnet grade (N40) compared with a magnet of similar elemental constitution made with commercial REE metal.

Significance and Impact

  • First Nd-Fe-B magnet production based on the new feedstock bypassing use or generation of hazardous HF.
  • Support domestic Nd metal and Nd-Fe-B magnet production.
  • Exceeds the focus area goal of a 40 MGOe magnet.

Hub Target Addressed 
Decarbonized rare earth metals and magnet production.