Elevated temperature behavior of sintered Nd-Fe-B type magnets
The effects of elevated temperature air exposure at 75 degrees , 100 degrees , 125 degrees , and 150 degrees C on the performance of sintered Nd-Fe-B type permanent magnets was investigated. The observations include a comparison of the initial and final demagnetization curves after long-term aging i...
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| Veröffentlicht in: | IEEE transactions on magnetics 1988-03, Vol.24 (2), p.1623-1625 |
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| container_title | IEEE transactions on magnetics |
| container_volume | 24 |
| creator | Mildrum, H.F. Umana, G.M. |
| description | The effects of elevated temperature air exposure at 75 degrees , 100 degrees , 125 degrees , and 150 degrees C on the performance of sintered Nd-Fe-B type permanent magnets was investigated. The observations include a comparison of the initial and final demagnetization curves after long-term aging in excess of 5000 h, initial irreversible losses on heating, and the stability of open-circuit remanent flux as a function of time, temperature, and operating-point permeance. Test samples were obtained from four magnet producers. The results reported may be typical for present commercial production magnets made from ternary Nd-Fe-B and from alloys modified with dysprosium and cobalt. Test results indicate that there are very restrictive operational limits imposed by a combination of elevated temperatures >or=125 degrees C, and unit permeance values |
| doi_str_mv | 10.1109/20.11550 |
| format | Article |
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The observations include a comparison of the initial and final demagnetization curves after long-term aging in excess of 5000 h, initial irreversible losses on heating, and the stability of open-circuit remanent flux as a function of time, temperature, and operating-point permeance. Test samples were obtained from four magnet producers. The results reported may be typical for present commercial production magnets made from ternary Nd-Fe-B and from alloys modified with dysprosium and cobalt. Test results indicate that there are very restrictive operational limits imposed by a combination of elevated temperatures >or=125 degrees C, and unit permeance values <or=1.< ></description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/20.11550</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Aging ; Cobalt alloys ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Cross-disciplinary physics: materials science; rheology ; Demagnetization ; Exact sciences and technology ; Heating ; Magnetic flux ; Magnetic properties and materials ; Materials science ; Metals, semimetals and alloys ; Other topics in magnetic properties and materials ; Permanent magnets ; Physics ; Production ; Specific materials ; Stability ; Temperature distribution ; Testing</subject><ispartof>IEEE transactions on magnetics, 1988-03, Vol.24 (2), p.1623-1625</ispartof><rights>1989 INIST-CNRS</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c334t-318c9f625ab09ba6a4d3880c0214b62695a7324b04be580740d29a1e14f0a283</citedby><cites>FETCH-LOGICAL-c334t-318c9f625ab09ba6a4d3880c0214b62695a7324b04be580740d29a1e14f0a283</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/11550$$EHTML$$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>$$Uhttps://ieeexplore.ieee.org/document/11550$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=7018436$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Mildrum, H.F.</creatorcontrib><creatorcontrib>Umana, G.M.</creatorcontrib><title>Elevated temperature behavior of sintered Nd-Fe-B type magnets</title><title>IEEE transactions on magnetics</title><addtitle>TMAG</addtitle><description>The effects of elevated temperature air exposure at 75 degrees , 100 degrees , 125 degrees , and 150 degrees C on the performance of sintered Nd-Fe-B type permanent magnets was investigated. The observations include a comparison of the initial and final demagnetization curves after long-term aging in excess of 5000 h, initial irreversible losses on heating, and the stability of open-circuit remanent flux as a function of time, temperature, and operating-point permeance. Test samples were obtained from four magnet producers. The results reported may be typical for present commercial production magnets made from ternary Nd-Fe-B and from alloys modified with dysprosium and cobalt. Test results indicate that there are very restrictive operational limits imposed by a combination of elevated temperatures >or=125 degrees C, and unit permeance values <or=1.< ></description><subject>Aging</subject><subject>Cobalt alloys</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Demagnetization</subject><subject>Exact sciences and technology</subject><subject>Heating</subject><subject>Magnetic flux</subject><subject>Magnetic properties and materials</subject><subject>Materials science</subject><subject>Metals, semimetals and alloys</subject><subject>Other topics in magnetic properties and materials</subject><subject>Permanent magnets</subject><subject>Physics</subject><subject>Production</subject><subject>Specific materials</subject><subject>Stability</subject><subject>Temperature distribution</subject><subject>Testing</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1988</creationdate><recordtype>article</recordtype><recordid>eNqN0EtLw0AUBeBBFKxVcOsuCxE30TuPTGY2gpZWhaKb7sNNcqORvJyZFvrvTa3o1tXhwMdZHMbOOdxwDvZW7DJJ4IBNuFU8BtD2kE0AuImt0uqYnXj_MVaVcJiwu3lDGwxURoHagRyGtaMop3fc1L2L-irydRfIjeCljBcUP0RhO1DU4ltHwZ-yowobT2c_OWWrxXw1e4qXr4_Ps_tlXEipQiy5KWylRYI52Bw1qlIaAwUIrnIttE0wlULloHJKDKQKSmGRE1cVoDByyq72s4PrP9fkQ9bWvqCmwY76tc-ESY22KfwDSmGSVI7weg8L13vvqMoGV7fothmHbHdkJnY5HjnSy59N9AU2lcOuqP2vT8dnldQju9izmoj-1r4nvgBST3d1</recordid><startdate>19880301</startdate><enddate>19880301</enddate><creator>Mildrum, H.F.</creator><creator>Umana, G.M.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><scope>8BQ</scope><scope>JG9</scope></search><sort><creationdate>19880301</creationdate><title>Elevated temperature behavior of sintered Nd-Fe-B type magnets</title><author>Mildrum, H.F. ; Umana, G.M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-318c9f625ab09ba6a4d3880c0214b62695a7324b04be580740d29a1e14f0a283</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1988</creationdate><topic>Aging</topic><topic>Cobalt alloys</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Demagnetization</topic><topic>Exact sciences and technology</topic><topic>Heating</topic><topic>Magnetic flux</topic><topic>Magnetic properties and materials</topic><topic>Materials science</topic><topic>Metals, semimetals and alloys</topic><topic>Other topics in magnetic properties and materials</topic><topic>Permanent magnets</topic><topic>Physics</topic><topic>Production</topic><topic>Specific materials</topic><topic>Stability</topic><topic>Temperature distribution</topic><topic>Testing</topic><toplevel>online_resources</toplevel><creatorcontrib>Mildrum, H.F.</creatorcontrib><creatorcontrib>Umana, G.M.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>METADEX</collection><collection>Materials Research Database</collection><jtitle>IEEE transactions on magnetics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Mildrum, H.F.</au><au>Umana, G.M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Elevated temperature behavior of sintered Nd-Fe-B type magnets</atitle><jtitle>IEEE transactions on magnetics</jtitle><stitle>TMAG</stitle><date>1988-03-01</date><risdate>1988</risdate><volume>24</volume><issue>2</issue><spage>1623</spage><epage>1625</epage><pages>1623-1625</pages><issn>0018-9464</issn><eissn>1941-0069</eissn><coden>IEMGAQ</coden><abstract>The effects of elevated temperature air exposure at 75 degrees , 100 degrees , 125 degrees , and 150 degrees C on the performance of sintered Nd-Fe-B type permanent magnets was investigated. The observations include a comparison of the initial and final demagnetization curves after long-term aging in excess of 5000 h, initial irreversible losses on heating, and the stability of open-circuit remanent flux as a function of time, temperature, and operating-point permeance. Test samples were obtained from four magnet producers. The results reported may be typical for present commercial production magnets made from ternary Nd-Fe-B and from alloys modified with dysprosium and cobalt. Test results indicate that there are very restrictive operational limits imposed by a combination of elevated temperatures >or=125 degrees C, and unit permeance values <or=1.< ></abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/20.11550</doi><tpages>3</tpages></addata></record> |
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| identifier | ISSN: 0018-9464 |
| ispartof | IEEE transactions on magnetics, 1988-03, Vol.24 (2), p.1623-1625 |
| issn | 0018-9464 1941-0069 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Aging Cobalt alloys Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Demagnetization Exact sciences and technology Heating Magnetic flux Magnetic properties and materials Materials science Metals, semimetals and alloys Other topics in magnetic properties and materials Permanent magnets Physics Production Specific materials Stability Temperature distribution Testing |
| title | Elevated temperature behavior of sintered Nd-Fe-B type magnets |
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