Effects of Nd-rich phase on the improved properties and recoil loops for hot deformed Nd-Fe-B magnets
Nd-rich phase plays a critical role in wetting grain boundary and facilitating texture formation for hot deformed (HD) Nd-Fe-B magnets. In this study, a non-uniform distribution of Nd-rich phase with dimension up to a few micrometers was observed in nanocrystalline HD magnets. The aggregation of the...
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| Veröffentlicht in: | Acta materialia 2016-08, Vol.115, p.385-391 |
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| creator | Hou, Y.H. Wang, Y.L. Huang, Y.L. Wang, Y. Li, S. Ma, S.C. Liu, Z.W. Zeng, D.C. Zhao, L.Z. Zhong, Z.C. |
| description | Nd-rich phase plays a critical role in wetting grain boundary and facilitating texture formation for hot deformed (HD) Nd-Fe-B magnets. In this study, a non-uniform distribution of Nd-rich phase with dimension up to a few micrometers was observed in nanocrystalline HD magnets. The aggregation of the Nd-rich phase is confirmed to result from the low density precursor prepared by spark plasma sintering (SPS). The large local demagnetizing fields induced by Nd-rich phase aggregation led to the open recoil loops and reduced coercivity. Upon reducing recoil loop openness by eliminating Nd-rich phase aggregation, the coercivity of the HD magnet was significantly improved from 226 kA/m to 995 kA/m, and a high maximum energy product of 293 kJ/m3 was obtained. The dependences of microstructure and coercivity on the recoil loop characteristics suggest an essential approach for improving the magnetic properties of nanocrystalline HD Nd-Fe-B magnets.
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| doi_str_mv | 10.1016/j.actamat.2016.06.015 |
| format | Article |
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[Display omitted]</description><subject>Agglomeration</subject><subject>Coercive force</subject><subject>Ferrous alloys</subject><subject>Hot deformed Nd-Fe-B magnet</subject><subject>Magnetic materials</subject><subject>Magnetic properties</subject><subject>Magnets</subject><subject>Nd-rich phase</subject><subject>Neodymium</subject><subject>Recoil</subject><subject>Recoil loops</subject><subject>Texture</subject><issn>1359-6454</issn><issn>1873-2453</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqFUMFKxDAUDKLguvoJQo5eWpO0SduT6OKqsOhFzyFNX2yWtqlJdsG_N8vuXXjw5sHMMG8QuqUkp4SK-22udFSjijlLZ07SUH6GFrSuioyVvDhPuOBNJkpeXqKrELaEUFaVZIHg2RjQMWBn8HuXeat7PPcqAHYTjj1gO87e7aHDac3go4WA1dRhD9rZAQ_OzQEb53HvIu4goTGRk9Uasic8qu8JYrhGF0YNAW5Oe4m-1s-fq9ds8_HytnrcZLooWcwENW0tONWsPsRuoYGWME4VV0K1IATpBKFKQdlUhtG6NIIWFS86ynlTE1Ys0d3RN4X92UGIcrRBwzCoCdwuSFozzkVVkDpR-ZGqvQvBg5Gzt6Pyv5ISeahVbuWpVnmoVZI0lCfdw1EH6Y-9BS-DtjBp6GyqJMrO2X8c_gBKxYJl</recordid><startdate>20160815</startdate><enddate>20160815</enddate><creator>Hou, Y.H.</creator><creator>Wang, Y.L.</creator><creator>Huang, Y.L.</creator><creator>Wang, Y.</creator><creator>Li, S.</creator><creator>Ma, S.C.</creator><creator>Liu, Z.W.</creator><creator>Zeng, D.C.</creator><creator>Zhao, L.Z.</creator><creator>Zhong, Z.C.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><orcidid>https://orcid.org/0000-0002-6250-7056</orcidid></search><sort><creationdate>20160815</creationdate><title>Effects of Nd-rich phase on the improved properties and recoil loops for hot deformed Nd-Fe-B magnets</title><author>Hou, Y.H. ; Wang, Y.L. ; Huang, Y.L. ; Wang, Y. ; Li, S. ; Ma, S.C. ; Liu, Z.W. ; Zeng, D.C. ; Zhao, L.Z. ; Zhong, Z.C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c342t-61fb8651c282453be9eb0251a5a6abe660d601aae497f2184f613753d15598023</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Agglomeration</topic><topic>Coercive force</topic><topic>Ferrous alloys</topic><topic>Hot deformed Nd-Fe-B magnet</topic><topic>Magnetic materials</topic><topic>Magnetic properties</topic><topic>Magnets</topic><topic>Nd-rich phase</topic><topic>Neodymium</topic><topic>Recoil</topic><topic>Recoil loops</topic><topic>Texture</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hou, Y.H.</creatorcontrib><creatorcontrib>Wang, Y.L.</creatorcontrib><creatorcontrib>Huang, Y.L.</creatorcontrib><creatorcontrib>Wang, Y.</creatorcontrib><creatorcontrib>Li, S.</creatorcontrib><creatorcontrib>Ma, S.C.</creatorcontrib><creatorcontrib>Liu, Z.W.</creatorcontrib><creatorcontrib>Zeng, D.C.</creatorcontrib><creatorcontrib>Zhao, L.Z.</creatorcontrib><creatorcontrib>Zhong, Z.C.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Acta materialia</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hou, Y.H.</au><au>Wang, Y.L.</au><au>Huang, Y.L.</au><au>Wang, Y.</au><au>Li, S.</au><au>Ma, S.C.</au><au>Liu, Z.W.</au><au>Zeng, D.C.</au><au>Zhao, L.Z.</au><au>Zhong, Z.C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of Nd-rich phase on the improved properties and recoil loops for hot deformed Nd-Fe-B magnets</atitle><jtitle>Acta materialia</jtitle><date>2016-08-15</date><risdate>2016</risdate><volume>115</volume><spage>385</spage><epage>391</epage><pages>385-391</pages><issn>1359-6454</issn><eissn>1873-2453</eissn><abstract>Nd-rich phase plays a critical role in wetting grain boundary and facilitating texture formation for hot deformed (HD) Nd-Fe-B magnets. In this study, a non-uniform distribution of Nd-rich phase with dimension up to a few micrometers was observed in nanocrystalline HD magnets. The aggregation of the Nd-rich phase is confirmed to result from the low density precursor prepared by spark plasma sintering (SPS). The large local demagnetizing fields induced by Nd-rich phase aggregation led to the open recoil loops and reduced coercivity. Upon reducing recoil loop openness by eliminating Nd-rich phase aggregation, the coercivity of the HD magnet was significantly improved from 226 kA/m to 995 kA/m, and a high maximum energy product of 293 kJ/m3 was obtained. The dependences of microstructure and coercivity on the recoil loop characteristics suggest an essential approach for improving the magnetic properties of nanocrystalline HD Nd-Fe-B magnets.
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| subjects | Agglomeration Coercive force Ferrous alloys Hot deformed Nd-Fe-B magnet Magnetic materials Magnetic properties Magnets Nd-rich phase Neodymium Recoil Recoil loops Texture |
| title | Effects of Nd-rich phase on the improved properties and recoil loops for hot deformed Nd-Fe-B magnets |
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