Simultaneous application of Dy-X (X = F or H) powder doping and dip-coating processes to Nd-Fe-B sintered magnets
DC Field | Value | Language |
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dc.contributor.author | Kim, Tae-Hoon | - |
dc.contributor.author | Lee, Seong-Rae | - |
dc.contributor.author | Kim, Hyo-Jun | - |
dc.contributor.author | Lee, Min-Woo | - |
dc.contributor.author | Jang, Tae-Suk | - |
dc.date.accessioned | 2021-09-04T14:28:25Z | - |
dc.date.available | 2021-09-04T14:28:25Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2015-07 | - |
dc.identifier.issn | 1359-6454 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/93088 | - |
dc.description.abstract | We investigated the microstructural and magnetic property changes of Nd-Fe-B sintered magnets with the application of simultaneous processing via powder doping and dip-coating, using DyF3 and/or DyH2. The simultaneous use of DyF3 powder doping and DyH2 dip-coating has a synergistic effect of improving the magnet's coercivity (H-c) while minimizing the reduction of remanence (B-r). DyF3 powder doping suppresses the formation of the rare-earth segregated oxide phase (RE-rich phase, Dy-Nd-O or Nd-O), dramatically improving the grain boundary diffusion depth of Dy (from 250 to 600 pm) during the grain boundary diffusion process (GBDP). The RE-rich phase in Nd-Fe-B magnets is a major obstacle for the grain boundary diffusion of Dy because of the high surface energy of the RE-rich phase and the consumption by the non-stoichiometric RE-rich phase of diffused Dy to form a stoichiometric (Nd,Dy)(2)O-3 phase, The slight reduction of the relative density of the as-sintered DyF3-doped magnet (from 98.1% to 97.5%) may have also helped to improve the grain boundary diffusion depth of Dy during the GBDP when the magnets were dip-coated with DyH2. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | MICROSTRUCTURAL CHARACTERISTICS | - |
dc.subject | COERCIVITY | - |
dc.subject | DY2O3 | - |
dc.title | Simultaneous application of Dy-X (X = F or H) powder doping and dip-coating processes to Nd-Fe-B sintered magnets | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Seong-Rae | - |
dc.identifier.doi | 10.1016/j.actamat.2015.04.019 | - |
dc.identifier.scopusid | 2-s2.0-84928652523 | - |
dc.identifier.wosid | 000356207500009 | - |
dc.identifier.bibliographicCitation | ACTA MATERIALIA, v.93, pp.95 - 104 | - |
dc.relation.isPartOf | ACTA MATERIALIA | - |
dc.citation.title | ACTA MATERIALIA | - |
dc.citation.volume | 93 | - |
dc.citation.startPage | 95 | - |
dc.citation.endPage | 104 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Metallurgy & Metallurgical Engineering | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Metallurgy & Metallurgical Engineering | - |
dc.subject.keywordPlus | MICROSTRUCTURAL CHARACTERISTICS | - |
dc.subject.keywordPlus | COERCIVITY | - |
dc.subject.keywordPlus | DY2O3 | - |
dc.subject.keywordAuthor | Nd-Fe-B sintered magnet | - |
dc.subject.keywordAuthor | Core shell microstructure | - |
dc.subject.keywordAuthor | Grain boundary diffusion depth of Dy | - |
dc.subject.keywordAuthor | Grain boundary diffusion process | - |
dc.subject.keywordAuthor | Powder doping process | - |
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