Low TC Fe-Cr-Nb-B glassy submicron powders for hyperthermia applications
Fe79.7−xNb0.3CrxB20 (x = 11.5–13.5 at. %) submicron powders with glassy structure and sizes between a few tens of nm and 1 μm have been prepared by high-energy ball milling from glassy melt-spun ribbons (MSRs) precursors. The glassy structure existing in the MSRs, and consisting of Fe-Cr clusters em...
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| Veröffentlicht in: | Journal of applied physics 2014-05, Vol.115 (17) |
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| creator | Chiriac, H. Lupu, N. Lostun, M. Ababei, G. Grigoraş, M. Dănceanu, C. |
| description | Fe79.7−xNb0.3CrxB20 (x = 11.5–13.5 at. %) submicron powders with glassy structure and sizes between a few tens of nm and 1 μm have been prepared by high-energy ball milling from glassy melt-spun ribbons (MSRs) precursors. The glassy structure existing in the MSRs, and consisting of Fe-Cr clusters embedded within the (Fe,Nb)3B residual amorphous matrix, is preserved by milling the annealed MSRs in oleic acid and n-heptane. The glassy structure of the submicron powders confers the specific magnetic properties and allows tuning the Curie temperatures in the range of 15–50 °C. The precipitation of α-Fe in excess shifts the Curie temperature to 780 °C. The use of surfactants (oleic acid or heptane) avoids partially the agglomeration of powders, and their individual size goes down to 25–40 nm. The heating efficiency of the submicron powders in a.c. fields (H = 350 mT and f = 153 kHz) evidences a working regime in the range of 33–45 °C, depending on Cr content, indicating the suitability of using the Fe-Cr-Nb-B powders for hyperthermia applications. |
| doi_str_mv | 10.1063/1.4866840 |
| format | Article |
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The glassy structure existing in the MSRs, and consisting of Fe-Cr clusters embedded within the (Fe,Nb)3B residual amorphous matrix, is preserved by milling the annealed MSRs in oleic acid and n-heptane. The glassy structure of the submicron powders confers the specific magnetic properties and allows tuning the Curie temperatures in the range of 15–50 °C. The precipitation of α-Fe in excess shifts the Curie temperature to 780 °C. The use of surfactants (oleic acid or heptane) avoids partially the agglomeration of powders, and their individual size goes down to 25–40 nm. The heating efficiency of the submicron powders in a.c. fields (H = 350 mT and f = 153 kHz) evidences a working regime in the range of 33–45 °C, depending on Cr content, indicating the suitability of using the Fe-Cr-Nb-B powders for hyperthermia applications.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.4866840</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Ball milling ; Chromium ; Curie temperature ; Heptanes ; Hyperthermia ; Iron ; Magnetic properties ; Melt spinning ; Niobium ; Oleic acid</subject><ispartof>Journal of applied physics, 2014-05, Vol.115 (17)</ispartof><rights>2014 AIP Publishing LLC.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c172t-318254465618f8745227cf49ccbd8dc4a58031f52b3c401525a4f77e6b28bea83</citedby><cites>FETCH-LOGICAL-c172t-318254465618f8745227cf49ccbd8dc4a58031f52b3c401525a4f77e6b28bea83</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27923,27924</link.rule.ids></links><search><creatorcontrib>Chiriac, H.</creatorcontrib><creatorcontrib>Lupu, N.</creatorcontrib><creatorcontrib>Lostun, M.</creatorcontrib><creatorcontrib>Ababei, G.</creatorcontrib><creatorcontrib>Grigoraş, M.</creatorcontrib><creatorcontrib>Dănceanu, C.</creatorcontrib><title>Low TC Fe-Cr-Nb-B glassy submicron powders for hyperthermia applications</title><title>Journal of applied physics</title><description>Fe79.7−xNb0.3CrxB20 (x = 11.5–13.5 at. %) submicron powders with glassy structure and sizes between a few tens of nm and 1 μm have been prepared by high-energy ball milling from glassy melt-spun ribbons (MSRs) precursors. The glassy structure existing in the MSRs, and consisting of Fe-Cr clusters embedded within the (Fe,Nb)3B residual amorphous matrix, is preserved by milling the annealed MSRs in oleic acid and n-heptane. The glassy structure of the submicron powders confers the specific magnetic properties and allows tuning the Curie temperatures in the range of 15–50 °C. The precipitation of α-Fe in excess shifts the Curie temperature to 780 °C. The use of surfactants (oleic acid or heptane) avoids partially the agglomeration of powders, and their individual size goes down to 25–40 nm. The heating efficiency of the submicron powders in a.c. fields (H = 350 mT and f = 153 kHz) evidences a working regime in the range of 33–45 °C, depending on Cr content, indicating the suitability of using the Fe-Cr-Nb-B powders for hyperthermia applications.</description><subject>Ball milling</subject><subject>Chromium</subject><subject>Curie temperature</subject><subject>Heptanes</subject><subject>Hyperthermia</subject><subject>Iron</subject><subject>Magnetic properties</subject><subject>Melt spinning</subject><subject>Niobium</subject><subject>Oleic acid</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNotkE1PAjEURRujiYgu_AdNXLmovtePaWepExETohtcN53SyhCgYzuE8O_FwOpuTu7NPYTcIzwhVOIZn6SpKiPhgowQTM20UnBJRgAcmal1fU1uSlkBIBpRj8h0lvZ03tBJYE1mny17pT9rV8qBll276XxOW9qn_SLkQmPKdHnoQx6WIW86R13frzvvhi5tyy25im5dwt05x-R78jZvpmz29f7RvMyYR80HJtBwJWWlKjTRaKk41z7K2vt2YRZeOmVAYFS8FV4CKq6cjFqHquWmDc6IMXk49fY5_e5CGewq7fL2OGk5cq2RQ62O1OOJOh4oJYdo-9xtXD5YBPsvyqI9ixJ_VhRYXQ</recordid><startdate>20140507</startdate><enddate>20140507</enddate><creator>Chiriac, H.</creator><creator>Lupu, N.</creator><creator>Lostun, M.</creator><creator>Ababei, G.</creator><creator>Grigoraş, M.</creator><creator>Dănceanu, C.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20140507</creationdate><title>Low TC Fe-Cr-Nb-B glassy submicron powders for hyperthermia applications</title><author>Chiriac, H. ; Lupu, N. ; Lostun, M. ; Ababei, G. ; Grigoraş, M. ; Dănceanu, C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c172t-318254465618f8745227cf49ccbd8dc4a58031f52b3c401525a4f77e6b28bea83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Ball milling</topic><topic>Chromium</topic><topic>Curie temperature</topic><topic>Heptanes</topic><topic>Hyperthermia</topic><topic>Iron</topic><topic>Magnetic properties</topic><topic>Melt spinning</topic><topic>Niobium</topic><topic>Oleic acid</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chiriac, H.</creatorcontrib><creatorcontrib>Lupu, N.</creatorcontrib><creatorcontrib>Lostun, M.</creatorcontrib><creatorcontrib>Ababei, G.</creatorcontrib><creatorcontrib>Grigoraş, M.</creatorcontrib><creatorcontrib>Dănceanu, C.</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chiriac, H.</au><au>Lupu, N.</au><au>Lostun, M.</au><au>Ababei, G.</au><au>Grigoraş, M.</au><au>Dănceanu, C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Low TC Fe-Cr-Nb-B glassy submicron powders for hyperthermia applications</atitle><jtitle>Journal of applied physics</jtitle><date>2014-05-07</date><risdate>2014</risdate><volume>115</volume><issue>17</issue><issn>0021-8979</issn><eissn>1089-7550</eissn><abstract>Fe79.7−xNb0.3CrxB20 (x = 11.5–13.5 at. %) submicron powders with glassy structure and sizes between a few tens of nm and 1 μm have been prepared by high-energy ball milling from glassy melt-spun ribbons (MSRs) precursors. The glassy structure existing in the MSRs, and consisting of Fe-Cr clusters embedded within the (Fe,Nb)3B residual amorphous matrix, is preserved by milling the annealed MSRs in oleic acid and n-heptane. The glassy structure of the submicron powders confers the specific magnetic properties and allows tuning the Curie temperatures in the range of 15–50 °C. The precipitation of α-Fe in excess shifts the Curie temperature to 780 °C. The use of surfactants (oleic acid or heptane) avoids partially the agglomeration of powders, and their individual size goes down to 25–40 nm. The heating efficiency of the submicron powders in a.c. fields (H = 350 mT and f = 153 kHz) evidences a working regime in the range of 33–45 °C, depending on Cr content, indicating the suitability of using the Fe-Cr-Nb-B powders for hyperthermia applications.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4866840</doi></addata></record> |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Ball milling Chromium Curie temperature Heptanes Hyperthermia Iron Magnetic properties Melt spinning Niobium Oleic acid |
| title | Low TC Fe-Cr-Nb-B glassy submicron powders for hyperthermia applications |
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