Hydrogen-disproportionation-desorption-recombination under applied magnetic field

Diagram showing magnetization data showing the increase in anisotropy gained after processing in a 0T field. — Magnetization data showing the increase in anisotropy gained after processing in a 0T field.

CMI researchers at Oak Ridge National Laboratory and Ames Laboratory conducted the activity for this highlight

Innovation
Hydrogenation-Disproportionation-Desorption-Recombination (HDDR) processed NdFeB powders were produced while applying a magnetic field between 0 and 9 T during both the HD and DR steps of the process.

Achievement
New process allows for faster powder production, improves particle anisotropy and maintains magnetic texture.

Significance and Impact
Work allows optimization of NdFeB magnet powders via application of magnetic field and is also likely applicable to SmCo magnet powder.

Hub Target Addressed
Win industry adoption of three technologies related to materials substitution for rare earth magnet materials.

Diagram showing magnetization data showing the increase in anisotropy gained after processing in a 2T field. — Magnetization data showing the increase in anisotropy gained after processing in a 2T field.