Tailored synthesis in nanoparticle permanent magnets (NPPMs)

CMI researchers at Ames National Laboratory conducted the research for this highlight

Innovation
Scaled-up processing achieved nearly phase pure Sm₂Fe₁₇N₃ powders densified into a bulk magnet.

Achievement
Achieved 87% density while retaining saturation magnetization and coercivity resulting in an energy product of 25.3 MGOe at room temperature.

Significance and Impact
Demonstrated a 50g batch of Sm₂Fe₁₇N₃ via reduction-diffusion of Sm₂O₃, a more energy efficient and lower emission synthesis route, that can produce superior magnetic powders which can be fabricated into a dense, monolithic magnet.

Hub Target Addressing 
Accelerated magnet discovery and maturation.