Rare-earth-free MnAl-C-Ni permanent magnets produced by extrusion of powder milled from bulk
dc.bibliographicCitation.firstPage | 155 | eng |
dc.bibliographicCitation.journalTitle | Acta Materialia | eng |
dc.bibliographicCitation.lastPage | 168 | eng |
dc.bibliographicCitation.volume | 199 | eng |
dc.contributor.author | Feng, Le | |
dc.contributor.author | Freudenberger, Jens | |
dc.contributor.author | Mix, Torsten | |
dc.contributor.author | Nielsch, Kornelius | |
dc.contributor.author | Woodcock, Thomas George | |
dc.date.accessioned | 2020-09-07T13:14:03Z | |
dc.date.available | 2020-09-07T13:14:03Z | |
dc.date.issued | 2020 | |
dc.description.abstract | Rare-earth-free MnAl-C-Ni permanent magnets have been produced for the first time by extruding powders milled from bulk. The resulting materials, fabricated using different conditions, contained a large volume fraction (> 0.92) of the desired τ-phase. In terms of the maximum energy product, the best performance obtained for a whole, transverse section of the extruded material was (BH)max = 46 kJm−3, and was (BH)max = 49 kJm−3 for a sample taken from near the edge of this section. Analysis showed that this material was comparable to the long-established benchmark, comprising MnAl-C-based magnets extruded in industry from bulk or from gas-atomised powder. Such materials are no longer available. The microstructure of the materials produced here consisted of fine, recrystallised grains, which exhibited an <001> fibre texture with intermediate texture quality and of larger, non-recrystallised regions, which contained hierarchical twinning and a high density of defects. The volume fraction and size of the non-recrystallised regions was greatly reduced by decreasing the size of the initial powder particles. This led to a large increase in the squareness factor of the demagnetisation curve and consequently to the high (BH)max values observed. | eng |
dc.description.version | publishedVersion | eng |
dc.identifier.uri | https://doi.org/10.34657/4246 | |
dc.identifier.uri | https://oa.tib.eu/renate/handle/123456789/5617 | |
dc.language.iso | eng | eng |
dc.publisher | Amsterdam : Elsevier | eng |
dc.relation.doi | https://doi.org/10.1016/j.actamat.2020.08.031 | |
dc.rights.license | CC BY 4.0 Unported | eng |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | eng |
dc.subject.ddc | 530 | eng |
dc.subject.other | Hard magnet | eng |
dc.subject.other | MnAl-C | eng |
dc.subject.other | Extrusion | eng |
dc.subject.other | EBSD | eng |
dc.title | Rare-earth-free MnAl-C-Ni permanent magnets produced by extrusion of powder milled from bulk | ger |
dc.type | Article | eng |
dc.type | Text | eng |
tib.accessRights | openAccess | eng |
wgl.contributor | IFWD | eng |
wgl.subject | Physik | eng |
wgl.type | Zeitschriftenartikel | eng |
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