Structural and magnetic properties of Ce1−xSmxFe11−yTi1Vy. (15th June 2019)

• Record Type: Journal Article
• Authors: Simon, D.; Wuest, H.; Hinderberger, S.; Koehler, T.; Marusczyk, A.; Sawatzki, S.; Diop, L.V.B.; Skokov, K.; Maccari, F.; Senyshyn, A.; Ehrenberg, H.; Gutfleisch, O.
• Is Part Of: Acta materialia. Volume 172(2019)
• Page Start: 131
• Page End: 138
• Publication Date: 2019-06-15
• Subjects: Permanent magnet -- Th1Mn12 phase -- Hot-deformation -- Meltspinning -- Structural analysis; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2019.04.006
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: In order to find a promising trade-off permanent magnet material regarding a performance/cost-ratio, the Ce 1 − x Sm x Fe 11 − y Ti 1 V y -phase (x = 0–1; y = 0, 1) is analyzed in detail. In the first part, its existence range is studied (1000 °C) and the intrinsic magnetic properties are comprehensively determined. Diffraction experiments localize both structure-stabilizing transition metals on 8i-sites, explaining the measured reduction in saturation polarization as V is added. Curie temperatures increase upon Sm-substitution with a negligible dependence on V. Annealings of nanocrystalline material produced via intensive milling and melt-spinning show that V especially raises the obtainable maximum coercivities for Sm-rich phases (924 kA/m). In the second part, the promising magnetic properties of the nanocrystalline material are successfully transferred to the bulk state via hot-pressing. The isotropic Ce 0 . 5 Sm 0 . 5 Fe 10 Ti 1 V 1 -magnet (coercivity = 425 kA/m) is characterized by various means. Magnetic measurements, structural investigations and calculations of the elastic constants consider necessary factors for a successful texturing by die-upsetting (as accepted for Nd - Fe -B). The results are fundamental for further considerations in this active field of research. Graphical abstract: Image 1