Additive manufacturing (AM) of high performance permanent magnets is a major research focus of the Collaborative Research Centre/Transregio “Hysteresis design of magnetic materials for efficient energy conversion“ (CRC/TRR 270, funded by the German Research Foundation) and led to a recent publication in the journal Advanced Functional Materials in a cooperative effort of the TU Darmstadt Functional Materials Group with the Fraunhofer IWKS and the Institute of Production Management, Technology and Machine Tools at TU Darmstadt.
The scientists demonstrated that Pr-Fe-Cu-B alloy design and AM process control lead to high magnetic coercivity due to a novel and unconventional microstructure compared to sintered or hot deformed Nd-Fe-B magnets.
The collaboration across the Material Science and Mechanical Engineering departments was enabled by TU Darmstadt internal FiF (Forum interdisziplinäre Forschung der TU Darmstadt) funding. Within the QuamM project (Qualifizierung magnetischer Materialien für die Additive Fertigung) the powder production, qualification and processing evaluation of functional magnetic materials by Laser-Powder-Bed-Fusion is targeted. The obtained results are important preliminary works for the planned AMC (Additive Manufacturing Centre) at TU Darmstadt.
Lukas Schäfer, Konstantin Skokov, Jianing Liu, Fernando Maccari, Tobias Braun, Stefan Riegg, Iliya Radulov, Jürgen Gassmann, Holger Merschroth, Jana Harbig, Matthias Weigold, Oliver Gutfleisch: “Design and Qualification of Pr–Fe–Cu–B Alloys for the Additive Manufacturing of Permanent Magnets”, in: Advanced Functional Materials 2021, 2102148