Additive manufacturing NdFeB bonded magnets reach the gap magnet milestone

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Development in energy product, BHmax of additively manufactured anisotropic bonded NdFeB magnets using BAAM system.
Development in energy product, BHmax of additively manufactured anisotropic bonded NdFeB magnets using Big Area Additive Manufacturing (BAAM) system

CMI scientists at Ames Laboratory and Oak Ridge National Laboratory contributed to this research.

Achievement:

Demonstrated BAAM anisotropic NdFeB bonded magnets with world record BHmax of 19.9 MGOe.

Significance and impact

Bonded magnets with reduced manufacturing waste may offset some REE demand through targeted use in  high-efficiency motors

Details and next steps

70 vol% anisotropic MQA NdFeB magnets printed in nylon polymers. Bonded magnets were post-annealed at 0.75 field to achieve gap magnets. Plan to achieve similar results with printing under in-situ applied magnetic field.