Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MM: Fachverband Metall- und Materialphysik
MM 9: Poster
MM 9.8: Poster
Montag, 17. März 2025, 18:30–20:30, P1
Influence of the alloying elements on microchemistry and nanostructure of Sm-Co based permanent magnets — •Burçak Ekitli1, Alex Aubert1, Fernando Maccari1, Nikita Polin2, Xinren Chen2, Esmaeil Adabifiroozjaei3, Leopoldo Molina-Luna3, Baptiste Gault2, Konstantin Skokov1, and Oliver Gutfleisch1 — 1Functional Materials, TU Darmstadt, 64287 Darmstadt, Germany — 2Max-Planck-Institut for Sustainable Materials, Düsseldorf 40237, Germany — 3Advanced Electron Microscopy, TU Darmstadt, 64287 Darmstadt, Germany
Sm-Co 2:17 magnets are high-temperature, high-performance magnets that are commercially available. Their hard magnetic properties are driven by a pinning mechanism, where the complex microstructure and microchemistry play an important role [1]. Since commercial 2:17 magnets consist of five alloying elements and three coherent phases, it is difficult to establish a common understanding of their intrinsic and extrinsic properties. In this study, we continue to investigate the 2:17 magnet system, focusing on a simplified alloy system that we initially introduced [2] by adding Cu to the alloy. Our study focuses on the quaternary Sm(Co,Cu,Zr)6.7 alloy, with four different compositions chosen based on varying Cu concentrations. We investigate the microstructural properties and their influence on the hysteresis of the Sm-Co 2:17 magnet in detail, using advanced characterization techniques such as MOKE, MFM, TEM, and APT. We reveal how Cu concentration influences the microstructure and phase formation, ultimately affecting the magnetic properties.
Keywords: Sm-Co magnets; domain wall pinning; Coercivity; cellular/lamellar structure; atom probe tomography