SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 3: Magnetic Materials for Efficient Energy Conversion

MA 3.2: Vortrag

Montag, 27. März 2023, 09:45–10:00, HSZ 401

Additive Manufacturing of (Pr,Nd)-Fe-Cu-B Permanent Magnets — •Jianing Liu¹, Ruiwen Xie², Alex Aubert¹, Lukas Schäfer¹, Holger Merschroth³, Jana Harbig³, Ying Yang⁴, Philipp Gabriel⁴, Anna Ziefuß⁴, Stefan Barcikowski⁴, Matthias Weigold³, Hongbin Zhang², Oliver Gutfleisch¹, and Konstantin Skokov¹ — ¹Functional Materials, Technical University of Darmstadt — ²Theory of Magnetic Materials, Technical University of Darmstadt — ³Institute of Production Management, Technology and Machine Tools, Technical University of Darmstadt — ⁴Technical Chemistry I, University of Duisburg-Essen

Additive Manufacturing (AM) of permanent magnets is a new and challenging field in material science and engineering. To obtain a microstructure necessary for high coercivity is by no means straightforward, especially after fast cooling in Laser Powder Bed Fusion (L-PBF). In order to achieve the desired microstructure and hard magnetic properties, we propose the Pr-Fe-Cu-B as a new useful reference alloy system and compare with its Nd-based counterpart. Our studies describe the L-PBF and the subsequent annealing optimization in order to understand the newly established coercivity mechanism. Specifically, we explore the 6-13-1-type grain boundary phase and grow single crystals to understand its magnetism, supported by DFT calculations. Furthermore, grain boundary engineering with nanoparticles shows great potential on grain refinement and uniaxial grain growth during re-solidification during L-PBF. We acknowledge the support of the Collaborative Research Centre/Transregio 270 HoMMage.