Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Poster 2
MA 35.52: Poster
Donnerstag, 8. September 2022, 16:00–18:00, P4
Additive Manufacturing of (Pr,Nd)-Fe-Cu-B Permanent Magnets using functionalized microparticles — •Jianing Liu1, Lukas Schäfer1, Holger Merschroth2, Jana Harbig2, Ying Yang3, Anna Ziefuß3, Matthias Weigold2, Stephan Barcikowski3, Oliver Gutfleisch1, and Konstantin Skokov1 — 1Functional Materials, Technical University of Darmstadt, Germany — 2Alarich-Weiss-Str. 16 — 3Technical Chemistry I, University of Duisburg-Essen, Germany
Additive Manufacturing (AM) of permanent magnets is an upcoming and challenging task in material science and engineering. A microstructure with engineered grain boundaries and grain sizes necessary for high coercivity is not easily obtainable, especially when using Laser Powder Bed Fusion (L-PBF) to obtain fully dense magnets. In order to achieve the desired microstructure and hard magnetic properties after printing, we proposed Pr-Fe-Cu-B based alloy as a useful alloy system and compare this with its Nd-based counterpart. Our studies describe the Pr-Fe-Cu-B alloys and their annealing optimization for L-PBF. In order to achieve an improved flowability and refined microstructure, the grain boundary engineering with nanoparticles shows great potential. The nanoparticle functionalized Pr-Fe-Cu-B powder was being validated as a precursor for AM. During L-PBF, the hypothesis of heterogeneous nucleation induced by NP inoculums during resolidification is explored with the goal of grain refinement and realizing more uniaxial growth. We acknowledge the support of the Collaborative Research Centre/Transregio 270 HoMMage.