Dependence of magnetic, phase-transformation and microstructural characteristics on the Cu content of Nd-Fe-B sintered magnet
DC Field | Value | Language |
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dc.contributor.author | Kim, Tae-Hoon | - |
dc.contributor.author | Lee, Seong-Rae | - |
dc.contributor.author | Lee, Min-Woo | - |
dc.contributor.author | Jang, Tae-Suk | - |
dc.contributor.author | Kim, Jin Woo | - |
dc.contributor.author | Kim, Young Do | - |
dc.contributor.author | Kim, Hyo-Jun | - |
dc.date.accessioned | 2021-09-05T10:51:18Z | - |
dc.date.available | 2021-09-05T10:51:18Z | - |
dc.date.created | 2021-06-15 | - |
dc.date.issued | 2014-03 | - |
dc.identifier.issn | 1359-6454 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/99106 | - |
dc.description.abstract | We have investigated the changes in the magnetic, phase-transformation and microstructural properties of Nd-Fe-B sintered magnets as a function of Cu content (0.2-0.5 at.%). The coercivity decreased (28.7 -> 27.1 kOe) with increasing Cu content without changing the remanence of the magnets under the normal post-sintering annealing (PSA) conditions. Phase-transformation temperature changes of the magnet were observed as the Cu content of the magnet was increased. In the 0.2 at.% Cu magnet, the triple junction phase (TJP) and grain boundary phase (GBP), composed of the Cu-enriched C-Nd2O3 phase, were formed. However, in the 0.5 at.% Cu magnet, the TJP and GBP were composed of the h-Nd2O3 phase. By considering the dependence of Cu content on the phase transformation, we have modified the 1st-PSA temperature to recover the coercivity. Through our newly established PSA conditions, the TJP and GBP in the 0.5 at.% Cu magnet were formed as the C-Nd2O3 phase. As a result, the coercivity of the magnet was noticeably enhanced (27.1 -> 29.4 kOe). The reasons for the coercivity deterioration in the high-Cu-content magnet were clarified. The detailed mechanism of the microstructural and magnetic property improvements induced by the modified 1st-PSA condition is discussed. The critical role of Cu in the microstructural changes of Nd-rich TJP and GBP during the PSA is also analyzed based on these results. (C) 2013 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 | RICH PHASE | - |
dc.subject | COERCIVITY | - |
dc.title | Dependence of magnetic, phase-transformation and microstructural characteristics on the Cu content of Nd-Fe-B sintered magnet | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Seong-Rae | - |
dc.identifier.doi | 10.1016/j.actamat.2013.11.063 | - |
dc.identifier.scopusid | 2-s2.0-84890991300 | - |
dc.identifier.wosid | 000331422600002 | - |
dc.identifier.bibliographicCitation | ACTA MATERIALIA, v.66, pp.12 - 21 | - |
dc.relation.isPartOf | ACTA MATERIALIA | - |
dc.citation.title | ACTA MATERIALIA | - |
dc.citation.volume | 66 | - |
dc.citation.startPage | 12 | - |
dc.citation.endPage | 21 | - |
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 | RICH PHASE | - |
dc.subject.keywordPlus | COERCIVITY | - |
dc.subject.keywordAuthor | Nd-Fe-B sintered magnets | - |
dc.subject.keywordAuthor | Cu content | - |
dc.subject.keywordAuthor | Phase-transformation temperature | - |
dc.subject.keywordAuthor | Post-sintering annealing | - |
dc.subject.keywordAuthor | Nd-rich phase | - |
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