Effect Of Nb And Cu On The Crystallization Behavior Of Understoichiometric Nd–Fe–B Alloys
dc.contributor.author | Salazar García, Domingo Carlos | |
dc.contributor.author | Martín Cid, A. | |
dc.contributor.author | Madugundo, R. | |
dc.contributor.author | Saiz Garitaonandia, José Javier | |
dc.contributor.author | Barandiarán García, José Manuel | |
dc.contributor.author | Hadjipanayis, G. C. | |
dc.date.accessioned | 2018-06-22T12:39:34Z | |
dc.date.available | 2018-06-22T12:39:34Z | |
dc.date.issued | 2017-01-11 | |
dc.identifier.citation | Journal of Physics D-applied Physics 50 : (2017) // Article ID 015305 | es_ES |
dc.identifier.issn | 1361-6463 | |
dc.identifier.uri | http://hdl.handle.net/10810/27677 | |
dc.description.abstract | In this work, we present a complete study of the influence of Nb and Cu addition on the crystallization behavior of Nd-lean Nd-Fe-B melt-spun alloys. Alloys with compositions Nd10-x-yFe84B6NbxCuy (x = 1, y = 0 and x = 0.5, y = 0.5) were melt-spun at different wheel speeds (15-40 m s(-1)) to obtain samples in amorphous, highly disordered and nanocrystalline structures. The crystallization process, induced by different heat treatments, was studied by means of differential thermal analysis and x-ray powder thermodiffraction. Magnetic properties of as-made and heat-treated ribbons were measured by magnetometry. The as-made amorphous samples showed a crystallization to the 2: 14: 1 hard magnetic phase at T-1 similar to 350 degrees C. Doping with Nb results in an increase of T1, and addition of Cu lowers T1. This behavior is explained in terms of an inhibition of grain growth by Nb and a nucleation enhancement by Cu additions. During the crystallization process, a secondary phase (identified as a bcc-Fe-rich phase) is formed. The amount of such a phase increases with the annealing temperature. Coercivity increases upon annealing reaching maxima at 700-750 degrees C. This can be explained in terms of competition between the two phases formed: the 2: 14: 1 hard phase and the soft bcc-Fe-rich phase. The highest coercivity of the Nd-lean samples is observed when the microstructure is appropriate and both phases are exchange-coupled. | es_ES |
dc.description.sponsorship | This work has received funding from the DOE BES-DE-FG02-90ER45413 and the European Union MSCA grant agreement No 691235 (INAPEM). Technical and human support provided by SGIker (UPV/EHU, GV/EJ and ESF) is gratefully acknowledged. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | IOP Publishing LTD | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
dc.subject | amorphous ribbons | es_ES |
dc.subject | nanocrystallization | es_ES |
dc.subject | rare-earth-lean permanent magnet | es_ES |
dc.subject | nanocomposite magnets | es_ES |
dc.subject | coercivity | es_ES |
dc.subject | NdFeB | es_ES |
dc.title | Effect Of Nb And Cu On The Crystallization Behavior Of Understoichiometric Nd–Fe–B Alloys | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. NonCommercial — You may not use the material for commercial purposes. NoDerivatives — If you remix, transform, or build upon the material, you may not distribute the modified material. No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits. | es_ES |
dc.rights.holder | Atribución-NoComercial-SinDerivadas 3.0 España | * |
dc.relation.publisherversion | http://iopscience.iop.org/nsearch?terms=Effect+of+Nb+and+Cu+on+the+crystallization+behavior+of+under-stoichiometric+Nd-Fe-B+alloys+ | es_ES |
dc.identifier.doi | 10.1088/1361-6463/50/1/015305 | |
dc.departamentoes | Electricidad y electrónica | es_ES |
dc.departamentoes | Geografía, prehistoria y arqueología | es_ES |
dc.departamentoeu | Elektrizitatea eta elektronika | es_ES |
dc.departamentoeu | Geografia,historiaurrea eta arkeologia | es_ES |
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