Patents issued for new processes high coercivity magnets

image of numbers of two U.S. Patents
Composite image depicting the synthesis process, including electrophoretic deposition to form greenbodies, then reduction of oxide nanoparticles in calcium vapor. Grain growth control yields extremely high coercivities.
Depiction of the synthesis process, including electrophoretic deposition to form greenbodies, then reduction of oxide nanoparticles in calcium vapor. Grain growth control yields extremely high coercivities.

CMI researchers from Lawrence Livermore National Laboratory conducted the research for this highlight.

Innovation
Patents issued for electrophoretic deposition and calcium vapor reduction of SmCo5 and Nd2Fe14B from oxide precursors.

Achievement
New processing route to fabricate arbitrary shaped oxide greenbodies using multiple AM techniques and convert to high-performance magnets using calcium vapor reduction process. Optimization of processing conditions yields SmCo5 with room temperature coercivity over 80 kOe – a world record.

Significance and Impact
Oxide usage greatly simplifies assembly, allowing bottom-up synthesis approaches where in-place conversion to magnet reduces material waste. Ultra-high coercivity enables high temperature applications.

Hub Goal Addressed
Reduce process chemical, material, and energy intensity.