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

Ce substituted Nd(2)Fe(14)B (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, (Nd(1−x)Ce(x)...

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Autores principales: Zhao, L. Z., Zhang, J. S., Ahmed, G., Liao, X. F., Liu, Z. W., Greneche, J. M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
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Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5931561/
https://www.ncbi.nlm.nih.gov/pubmed/29717167
http://dx.doi.org/10.1038/s41598-018-25230-0
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author Zhao, L. Z.
Zhang, J. S.
Ahmed, G.
Liao, X. F.
Liu, Z. W.
Greneche, J. M.
author_facet Zhao, L. Z.
Zhang, J. S.
Ahmed, G.
Liao, X. F.
Liu, Z. W.
Greneche, J. M.
author_sort Zhao, L. Z.
collection PubMed
description Ce substituted Nd(2)Fe(14)B (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, (Nd(1−x)Ce(x))(25)Fe(40)Co(20)Al(4)B(11) 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.
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spelling pubmed-59315612018-08-29 Understanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys Zhao, L. Z. Zhang, J. S. Ahmed, G. Liao, X. F. Liu, Z. W. Greneche, J. M. Sci Rep Article Ce substituted Nd(2)Fe(14)B (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, (Nd(1−x)Ce(x))(25)Fe(40)Co(20)Al(4)B(11) 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. Nature Publishing Group UK 2018-05-01 /pmc/articles/PMC5931561/ /pubmed/29717167 http://dx.doi.org/10.1038/s41598-018-25230-0 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Zhao, L. Z.
Zhang, J. S.
Ahmed, G.
Liao, X. F.
Liu, Z. W.
Greneche, J. M.
Understanding the element segregation and phase separation in the Ce-substituted Nd-(Fe,Co)-B based alloys
title 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_short 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
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5931561/
https://www.ncbi.nlm.nih.gov/pubmed/29717167
http://dx.doi.org/10.1038/s41598-018-25230-0
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