Journal
MATERIALS AND MANUFACTURING PROCESSES
Volume 33, Issue 1, Pages 109-113Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10426914.2016.1221097
Keywords
3D printing; bonded magnets; direct-write; magnetic properties; NdFeB
Funding
- Critical Material Institute, an Energy Innovation Hub - U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office [DE-AC05-00OR22725]
- University of Tennessee
- UT-Battelle, LLC
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We report a method to fabricate Nd-Fe-B (NdFeB) bonded magnets of complex shape via extrusionbased additive manufacturing (AM), also known as 3D-printing. We have successfully formulated a 3D-printable epoxy-based ink for direct-write AM with anisotropic MQA NdFeB magnet particles that can be deposited at room temperature. The new feedstocks contain up to 40 vol.% MQA anisotropic NdFeB magnet particles, and they are shown to remain uniformly dispersed in the thermoset matrix throughout the deposition process. Ring, bar, and horseshoe-type 3D magnet structures were printed and cured in air at 100 degrees C without degrading the magnetic properties. This study provides a new pathway for fabricating NdFeB bonded magnets with complex geometry at low temperature, and presents new opportunities for fabricating multifunctional hybrid structures and devices.
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