Dysprosium Diffusion Behavior and Microstructure Modification in Sintered Nd-Fe-B Magnets via Dual-Alloy Method
Dysprosium diffusion and microstructure alteration behaviors in sintered Nd-Fe-B magnets via dual-alloy method have been investigated. The sintered magnets were prepared by blending Dy-free and Dy-rich powders with varying proportions. Results indicate that Dy element has already diffused from Dy-ri...
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| Veröffentlicht in: | IEEE transactions on magnetics 2013-07, Vol.49 (7), p.3233-3236 |
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| creator | Lin, Chaowei Guo, Shuai Fu, Wenbiao Chen, Renjie Lee, Don Yan, Aru |
| description | Dysprosium diffusion and microstructure alteration behaviors in sintered Nd-Fe-B magnets via dual-alloy method have been investigated. The sintered magnets were prepared by blending Dy-free and Dy-rich powders with varying proportions. Results indicate that Dy element has already diffused from Dy-rich powders into the 2:14:1 phase of Dy-free powders and tended to homogenize in the bulk magnet, attributed to the coalescence of grains and dysprosium element concentration gradient. In addition, Dy and Pr/Nd elements counterdiffusion process redistributes the grain boundaries homogeneously. The fracture surfaces of magnets prepared via dual-alloy method almost appear intergranular fracture. It demonstrates that both of (Nd/Pr, Dy) 2 Fe 14 B phase formation and microstructure alteration have favored to coercivity enhancement and thermal stability improvement of the magnets. |
| doi_str_mv | 10.1109/TMAG.2013.2243128 |
| format | Article |
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The sintered magnets were prepared by blending Dy-free and Dy-rich powders with varying proportions. Results indicate that Dy element has already diffused from Dy-rich powders into the 2:14:1 phase of Dy-free powders and tended to homogenize in the bulk magnet, attributed to the coalescence of grains and dysprosium element concentration gradient. In addition, Dy and Pr/Nd elements counterdiffusion process redistributes the grain boundaries homogeneously. The fracture surfaces of magnets prepared via dual-alloy method almost appear intergranular fracture. It demonstrates that both of (Nd/Pr, Dy) 2 Fe 14 B phase formation and microstructure alteration have favored to coercivity enhancement and thermal stability improvement of the magnets.</description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/TMAG.2013.2243128</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Applied sciences ; Coercive force ; Coercivity enhancement ; Cross-disciplinary physics: materials science; rheology ; dual-alloy method ; dysprosium diffusion ; Exact sciences and technology ; Magnetic resonance imaging ; Magnetism ; Materials science ; Metals. Metallurgy ; Microstructure ; microstructure modification ; Other topics in materials science ; Perpendicular magnetic anisotropy ; Physics ; Powder metallurgy. Composite materials ; Powders ; Production techniques ; Saturation magnetization ; Sintered metals and alloys. Pseudo alloys. Cermets</subject><ispartof>IEEE transactions on magnetics, 2013-07, Vol.49 (7), p.3233-3236</ispartof><rights>2014 INIST-CNRS</rights><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Jul 2013</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c389t-138b614efa5356f420ddbb3ccd8423ed5a56b99f36f20efa0e95a4a7c7192f803</citedby><cites>FETCH-LOGICAL-c389t-138b614efa5356f420ddbb3ccd8423ed5a56b99f36f20efa0e95a4a7c7192f803</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/6559191$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>309,310,314,780,784,789,790,796,23930,23931,25140,27924,27925,54758</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/6559191$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27735138$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Lin, Chaowei</creatorcontrib><creatorcontrib>Guo, Shuai</creatorcontrib><creatorcontrib>Fu, Wenbiao</creatorcontrib><creatorcontrib>Chen, Renjie</creatorcontrib><creatorcontrib>Lee, Don</creatorcontrib><creatorcontrib>Yan, Aru</creatorcontrib><title>Dysprosium Diffusion Behavior and Microstructure Modification in Sintered Nd-Fe-B Magnets via Dual-Alloy Method</title><title>IEEE transactions on magnetics</title><addtitle>TMAG</addtitle><description>Dysprosium diffusion and microstructure alteration behaviors in sintered Nd-Fe-B magnets via dual-alloy method have been investigated. The sintered magnets were prepared by blending Dy-free and Dy-rich powders with varying proportions. Results indicate that Dy element has already diffused from Dy-rich powders into the 2:14:1 phase of Dy-free powders and tended to homogenize in the bulk magnet, attributed to the coalescence of grains and dysprosium element concentration gradient. In addition, Dy and Pr/Nd elements counterdiffusion process redistributes the grain boundaries homogeneously. The fracture surfaces of magnets prepared via dual-alloy method almost appear intergranular fracture. It demonstrates that both of (Nd/Pr, Dy) 2 Fe 14 B phase formation and microstructure alteration have favored to coercivity enhancement and thermal stability improvement of the magnets.</description><subject>Applied sciences</subject><subject>Coercive force</subject><subject>Coercivity enhancement</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>dual-alloy method</subject><subject>dysprosium diffusion</subject><subject>Exact sciences and technology</subject><subject>Magnetic resonance imaging</subject><subject>Magnetism</subject><subject>Materials science</subject><subject>Metals. Metallurgy</subject><subject>Microstructure</subject><subject>microstructure modification</subject><subject>Other topics in materials science</subject><subject>Perpendicular magnetic anisotropy</subject><subject>Physics</subject><subject>Powder metallurgy. Composite materials</subject><subject>Powders</subject><subject>Production techniques</subject><subject>Saturation magnetization</subject><subject>Sintered metals and alloys. Pseudo alloys. 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Cermets</topic><toplevel>online_resources</toplevel><creatorcontrib>Lin, Chaowei</creatorcontrib><creatorcontrib>Guo, Shuai</creatorcontrib><creatorcontrib>Fu, Wenbiao</creatorcontrib><creatorcontrib>Chen, Renjie</creatorcontrib><creatorcontrib>Lee, Don</creatorcontrib><creatorcontrib>Yan, Aru</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE transactions on magnetics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Lin, Chaowei</au><au>Guo, Shuai</au><au>Fu, Wenbiao</au><au>Chen, Renjie</au><au>Lee, Don</au><au>Yan, Aru</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dysprosium Diffusion Behavior and Microstructure Modification in Sintered Nd-Fe-B Magnets via Dual-Alloy Method</atitle><jtitle>IEEE transactions on magnetics</jtitle><stitle>TMAG</stitle><date>2013-07-01</date><risdate>2013</risdate><volume>49</volume><issue>7</issue><spage>3233</spage><epage>3236</epage><pages>3233-3236</pages><issn>0018-9464</issn><eissn>1941-0069</eissn><coden>IEMGAQ</coden><abstract>Dysprosium diffusion and microstructure alteration behaviors in sintered Nd-Fe-B magnets via dual-alloy method have been investigated. The sintered magnets were prepared by blending Dy-free and Dy-rich powders with varying proportions. Results indicate that Dy element has already diffused from Dy-rich powders into the 2:14:1 phase of Dy-free powders and tended to homogenize in the bulk magnet, attributed to the coalescence of grains and dysprosium element concentration gradient. In addition, Dy and Pr/Nd elements counterdiffusion process redistributes the grain boundaries homogeneously. The fracture surfaces of magnets prepared via dual-alloy method almost appear intergranular fracture. It demonstrates that both of (Nd/Pr, Dy) 2 Fe 14 B phase formation and microstructure alteration have favored to coercivity enhancement and thermal stability improvement of the magnets.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TMAG.2013.2243128</doi><tpages>4</tpages></addata></record> |
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| subjects | Applied sciences Coercive force Coercivity enhancement Cross-disciplinary physics: materials science rheology dual-alloy method dysprosium diffusion Exact sciences and technology Magnetic resonance imaging Magnetism Materials science Metals. Metallurgy Microstructure microstructure modification Other topics in materials science Perpendicular magnetic anisotropy Physics Powder metallurgy. Composite materials Powders Production techniques Saturation magnetization Sintered metals and alloys. Pseudo alloys. Cermets |
| title | Dysprosium Diffusion Behavior and Microstructure Modification in Sintered Nd-Fe-B Magnets via Dual-Alloy Method |
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