Ener, Semih ; Anagnostopoulou, Evangelia ; Dirba, Imants ; Lacroix, Lise-Marie ; Ott, Frédéric ; Blon, Thomas ; Piquemal, Jean-Yves ; Skokov, Konstantin P. ; Gutfleisch, Oliver ; Viau, Guillaume (2018)
Consolidation of cobalt nanorods: A new route for rare-earth free nanostructured permanent magnets.
In: Acta Materialia, 145
doi: 10.1016/j.actamat.2017.12.009
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Rare-earth free permanent magnets were produced by consolidation of cobalt nanorods synthesized by the polyol process exhibiting a mean diameter in the range 10-30 nm. Compactions of magnetically prealigned rod assemblies at various pressures and temperatures were carried out to make dense materials. Bulk magnets exhibiting a very good mechanical strength and an energy product as high as 65 kJ m(-3) were obtained. The best results were obtained when the compaction conditions were soft enough to preserve the morphology and alignment of the rods in the final material, as revealed by X-ray diffraction and neutron scattering. For the first time the bottom-up approach is convincingly reported to produce bulk magnets without the addition of any matrix, the obtained nanostructured materials exhibit coercivity much higher than the AlNiCo magnets and can fill the performance "gap" between hexaferrites and rare-earth based magnets. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Ener, Semih ; Anagnostopoulou, Evangelia ; Dirba, Imants ; Lacroix, Lise-Marie ; Ott, Frédéric ; Blon, Thomas ; Piquemal, Jean-Yves ; Skokov, Konstantin P. ; Gutfleisch, Oliver ; Viau, Guillaume |
| Art des Eintrags: | Bibliographie |
| Titel: | Consolidation of cobalt nanorods: A new route for rare-earth free nanostructured permanent magnets |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Februar 2018 |
| Verlag: | Pergamon-Elsevier Science LTD, Oxford, England |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 145 |
| DOI: | 10.1016/j.actamat.2017.12.009 |
| URL / URN: | https://doi.org/10.1016/j.actamat.2017.12.009 |
| Kurzbeschreibung (Abstract): | Rare-earth free permanent magnets were produced by consolidation of cobalt nanorods synthesized by the polyol process exhibiting a mean diameter in the range 10-30 nm. Compactions of magnetically prealigned rod assemblies at various pressures and temperatures were carried out to make dense materials. Bulk magnets exhibiting a very good mechanical strength and an energy product as high as 65 kJ m(-3) were obtained. The best results were obtained when the compaction conditions were soft enough to preserve the morphology and alignment of the rods in the final material, as revealed by X-ray diffraction and neutron scattering. For the first time the bottom-up approach is convincingly reported to produce bulk magnets without the addition of any matrix, the obtained nanostructured materials exhibit coercivity much higher than the AlNiCo magnets and can fill the performance "gap" between hexaferrites and rare-earth based magnets. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Freie Schlagworte: | Cobalt nanorods, Permanent magnets, Bottom-up, Energy product, Consolidation process |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 12 Mär 2018 10:15 |
| Letzte Änderung: | 12 Mär 2018 10:15 |
| PPN: | |
| Sponsoren: | Authors are grateful to the European Community's Seventh Framework Programme for supporting this study with FP7/2007-2013 under Grant agreement number EU NMP3-SL-2012-280670 (Rare Earth Free Permanent Magnets - REFREEPERMAG). |
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