Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 50: Bulk Materials: Soft and Hard Permanent Magnets
MA 50.5: Talk
Thursday, March 12, 2026, 16:00–16:15, POT/0151
Unraveling the Magnetic Interactions of Nanocrystalline Rare-Earth-Lean Nd-Fe-B Powder and the Influence of Additive Manufacturing on the Magnetic Properties — •Priyatosh Sahoo1, Lukas Schäfer1, Kilian Schäfer1, Franziska Scheibel1, Esmaeil Adabifiroozjaei1, Rebekka Hlawaty1, Enrico Bruder1, Philipp Gabriel2, Anna Ziefuß2, Stephan Barcikowski2, Leopoldo Molina-Luna1, Karsten Durst1, Oliver Gutfleisch1, and Konstantin Skokov1 — 1TU Darmstadt, Germany — 2Universität Duisburg-Essen, Germany
MQP-S powder is a promising material for Laser Powder Bed Fusion (PBF-LB/M) thanks to its excellent flowability and hard magnetic properties. It shows enhanced remanence despite an isotropic microstructure, indicating exchange-spring-like behavior. However, PBF-LB/M processing fully melts the powder, erasing its initial microstructure and possibly affecting magnetic interactions. This study explores how PBF-LB/M parameters influence both density and magnetic performance in MQP-S magnets. Selected samples were characterized using Henkel and Thamm-Hesse plots, First-Order Reversal Curves (FORC) and magnetic domain imaging give insides about the global and local magnetic properties and interaction. A comparative analysis between the initial powder and the additively manufactured samples shows distinct magnetic coupling behaviors linked to the changing microstructure, providing new insights into the relationships among processing, microstructure, and properties in these magnets.
Keywords: Nd-Fe-B; MQP-S Magnets; Exchange Coupled Magnets; Additive Manufacturing; First Order Reversal Curves