Understanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys

Abstract Ce substituted Nd2Fe14B (2:14:1)-type permanent magnets have shown increasing potential in the applications due to their high properties/cost ratio. However, the element segregation and phase separation in the Ce substituted magnets have not been fully understood yet. In this work, (Nd1−xCe...

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Autores principales:	L. Z. Zhao, J. S. Zhang, G. Ahmed, X. F. Liao, Z. W. Liu, J. M. Greneche
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ed68d45c427f49be85f5a71e280af252
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spelling	oai:doaj.org-article:ed68d45c427f49be85f5a71e280af2522021-12-02T16:08:14ZUnderstanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys10.1038/s41598-018-25230-02045-2322https://doaj.org/article/ed68d45c427f49be85f5a71e280af2522018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25230-0https://doaj.org/toc/2045-2322Abstract Ce substituted Nd2Fe14B (2:14:1)-type permanent magnets have shown increasing potential in the applications due to their high properties/cost ratio. However, the element segregation and phase separation in the Ce substituted magnets have not been fully understood yet. In this work, (Nd1−xCex)25Fe40Co20Al4B11 alloys with high coercivities were prepared by copper mold casting. Based on detailed microstructure and composition analysis, the segregation of rare earth (RE) elements was observed in the as-cast alloys. Nd element prefers to enter into the 2:14:1 phase and the Ce element enter into the 1:2 phase. The existence of the 1:2 phase can promote the element segregation. The alloy shows an abnormal increase of coercivity from 641 kA/m for x = 0.2 to 863 kA/m for x = 0.3. This increase could be attributed to the phase separation of the 2:14:1 phase, which has been confirmed by the microstructural characterization. The present data provides useful information for exploring Ce-containing Nd-Fe-B magnets.L. Z. ZhaoJ. S. ZhangG. AhmedX. F. LiaoZ. W. LiuJ. M. GrenecheNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q L. Z. Zhao J. S. Zhang G. Ahmed X. F. Liao Z. W. Liu J. M. Greneche Understanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys
description	Abstract Ce substituted Nd2Fe14B (2:14:1)-type permanent magnets have shown increasing potential in the applications due to their high properties/cost ratio. However, the element segregation and phase separation in the Ce substituted magnets have not been fully understood yet. In this work, (Nd1−xCex)25Fe40Co20Al4B11 alloys with high coercivities were prepared by copper mold casting. Based on detailed microstructure and composition analysis, the segregation of rare earth (RE) elements was observed in the as-cast alloys. Nd element prefers to enter into the 2:14:1 phase and the Ce element enter into the 1:2 phase. The existence of the 1:2 phase can promote the element segregation. The alloy shows an abnormal increase of coercivity from 641 kA/m for x = 0.2 to 863 kA/m for x = 0.3. This increase could be attributed to the phase separation of the 2:14:1 phase, which has been confirmed by the microstructural characterization. The present data provides useful information for exploring Ce-containing Nd-Fe-B magnets.
format	article
author	L. Z. Zhao J. S. Zhang G. Ahmed X. F. Liao Z. W. Liu J. M. Greneche
author_facet	L. Z. Zhao J. S. Zhang G. Ahmed X. F. Liao Z. W. Liu J. M. Greneche
author_sort	L. Z. Zhao
title	Understanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys
title_short	Understanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys
title_full	Understanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys
title_fullStr	Understanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys
title_full_unstemmed	Understanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys
title_sort	understanding the element segregation and phase separation in the ce-substituted nd-(fe,co)-b based alloys
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/ed68d45c427f49be85f5a71e280af252
work_keys_str_mv	AT lzzhao understandingtheelementsegregationandphaseseparationinthecesubstitutedndfecobbasedalloys AT jszhang understandingtheelementsegregationandphaseseparationinthecesubstitutedndfecobbasedalloys AT gahmed understandingtheelementsegregationandphaseseparationinthecesubstitutedndfecobbasedalloys AT xfliao understandingtheelementsegregationandphaseseparationinthecesubstitutedndfecobbasedalloys AT zwliu understandingtheelementsegregationandphaseseparationinthecesubstitutedndfecobbasedalloys AT jmgreneche understandingtheelementsegregationandphaseseparationinthecesubstitutedndfecobbasedalloys
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Understanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys

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