Sawatzki, Simon ; Dirks, Almut ; Frincu, Bianca ; Löwe, Konrad ; Gutfleisch, Oliver (2014)
Coercivity enhancement in hot-pressed Nd-Fe-B permanent magnets with low melting eutectics.
In: Journal of Applied Physics, 115 (17)
doi: 10.1063/1.4859097
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Nd-Fe-B melt-spun ribbons with optimized composition for hot workability have been hot-compacted together with low melting DyCu, DyNiAl, NdCu, and NdAl powders to enhance coercivity. Annealing at 600 °C leads to an interdiffusion of Dy and Nd at the interfaces between the Nd-Fe-B flakes and the Dy-rich phase. This modifies the grain boundary phase and thus further enhances coercivity without decreasing remanence. The higher coercivity for DyCu compared to DyNiAl was attributed to the lower melting point obtained by differential scanning calorimetry. For NdCu and NdAl, annealing was found to be ineffective.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Sawatzki, Simon ; Dirks, Almut ; Frincu, Bianca ; Löwe, Konrad ; Gutfleisch, Oliver |
| Art des Eintrags: | Bibliographie |
| Titel: | Coercivity enhancement in hot-pressed Nd-Fe-B permanent magnets with low melting eutectics |
| Sprache: | Englisch |
| Publikationsjahr: | Mai 2014 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 115 |
| (Heft-)Nummer: | 17 |
| DOI: | 10.1063/1.4859097 |
| Kurzbeschreibung (Abstract): | Nd-Fe-B melt-spun ribbons with optimized composition for hot workability have been hot-compacted together with low melting DyCu, DyNiAl, NdCu, and NdAl powders to enhance coercivity. Annealing at 600 °C leads to an interdiffusion of Dy and Nd at the interfaces between the Nd-Fe-B flakes and the Dy-rich phase. This modifies the grain boundary phase and thus further enhances coercivity without decreasing remanence. The higher coercivity for DyCu compared to DyNiAl was attributed to the lower melting point obtained by differential scanning calorimetry. For NdCu and NdAl, annealing was found to be ineffective. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 19 Mai 2014 11:38 |
| Letzte Änderung: | 19 Mai 2014 11:38 |
| PPN: | |
| Sponsoren: | We thank the BMWi (Bundesministerium f. Wirtschaft und Technologie) via IGF (Industrielle Gemeinschaftsforschung), AiF (Allianz Industrie Forschung), and FVA (Forschungsvereinigung Antriebstechnik e.V.) for financial support. |
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