Güth, Konrad ; Lyubina, Julia ; Gebel, Bernhard ; Schultz, Ludwig ; Gutfleisch, Oliver (2012)
Ultra-fine grained Nd–Fe–B by high pressure reactive milling and desorption.
In: Journal of Magnetism and Magnetic Materials, 324 (18)
doi: 10.1016/j.jmmm.2012.03.059
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
This paper reports on the grain refinement in dynamic hydrogenation disproportionation desorption and recombination (d-HDDR) processed Nd-rich Nd2Fe14B and stoichiometric Nd2Fe14B powders using high pressure reactive milling (HPRM) followed by a subsequent desorption and recombination. In contrast to the dynamic-HDDR processed anisotropic powder with a grain size of the Nd2Fe14B phase of 300 nm, the new approach yields a further reduction of the Nd2Fe14B1 grain size to less than 70 nm. Nd-rich Nd2Fe14B powder produced by HPRM and subsequent desorption exhibits a coercivity μ0iHc=1.35 T and a remanence of 0.80 T. In the stoichiometric material, the reduction of the Nd-content leads to an increase in remanence to 0.85 T. Additionally, it is demonstrated that highly anisotropic powders can also be obtained by dynamic-HDDR processing of stoichiometric Nd2Fe14B powders.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Güth, Konrad ; Lyubina, Julia ; Gebel, Bernhard ; Schultz, Ludwig ; Gutfleisch, Oliver |
| Art des Eintrags: | Bibliographie |
| Titel: | Ultra-fine grained Nd–Fe–B by high pressure reactive milling and desorption |
| Sprache: | Englisch |
| Publikationsjahr: | September 2012 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Magnetism and Magnetic Materials |
| Jahrgang/Volume einer Zeitschrift: | 324 |
| (Heft-)Nummer: | 18 |
| DOI: | 10.1016/j.jmmm.2012.03.059 |
| Kurzbeschreibung (Abstract): | This paper reports on the grain refinement in dynamic hydrogenation disproportionation desorption and recombination (d-HDDR) processed Nd-rich Nd2Fe14B and stoichiometric Nd2Fe14B powders using high pressure reactive milling (HPRM) followed by a subsequent desorption and recombination. In contrast to the dynamic-HDDR processed anisotropic powder with a grain size of the Nd2Fe14B phase of 300 nm, the new approach yields a further reduction of the Nd2Fe14B1 grain size to less than 70 nm. Nd-rich Nd2Fe14B powder produced by HPRM and subsequent desorption exhibits a coercivity μ0iHc=1.35 T and a remanence of 0.80 T. In the stoichiometric material, the reduction of the Nd-content leads to an increase in remanence to 0.85 T. Additionally, it is demonstrated that highly anisotropic powders can also be obtained by dynamic-HDDR processing of stoichiometric Nd2Fe14B powders. |
| Freie Schlagworte: | High pressure reactive milling, HDDR, Grain refinement, Nd–Fe–B textured magnet |
| 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: | 18 Apr 2013 09:11 |
| Letzte Änderung: | 19 Apr 2013 11:30 |
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