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Characterization of cubic γ-phase uranium molybdenum alloys synthesized by ultrafast cooling
► U-Mo alloys prepared by splat cooling. ► A small amount of γ-phase was preserved in pure splat-cooled uranium specimen. ► Crystal structure characterized by X-ray diffraction and EBSD. ► A stability of γ-phase for alloys with 11–15at.% Mo. ► Superconducting transition, Tc=1.24K (pure-U) to 2.11K (...
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| Published in: | Journal of alloys and compounds 2012-09, Vol.534, p.101-109 |
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| Main Authors: | , , , , , , , |
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| cited_by | cdi_FETCH-LOGICAL-c372t-efa0c9ee06bc2e02f9a233515253b1639228147c91d522b36bcf70fd0d52f1953 |
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| cites | cdi_FETCH-LOGICAL-c372t-efa0c9ee06bc2e02f9a233515253b1639228147c91d522b36bcf70fd0d52f1953 |
| container_end_page | 109 |
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| container_start_page | 101 |
| container_title | Journal of alloys and compounds |
| container_volume | 534 |
| creator | Tkach, I. Kim-Ngan, N.-T.H. Mašková, S. Dzevenko, M. Havela, L. Warren, A. Stitt, C. Scott, T. |
| description | ► U-Mo alloys prepared by splat cooling. ► A small amount of γ-phase was preserved in pure splat-cooled uranium specimen. ► Crystal structure characterized by X-ray diffraction and EBSD. ► A stability of γ-phase for alloys with 11–15at.% Mo. ► Superconducting transition, Tc=1.24K (pure-U) to 2.11K (U-15at.% Mo).
U-Mo alloys with Mo concentration in the range of 0–15at.% Mo were prepared using a splat-cooling technique. Phase analysis using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron back-scatter diffraction (EBSD) revealed the presence of a small amount of γ-U phase retained at room temperature alongside the majority α-U phase and opening the possibility of stabilizing the γ-phase at room temperature in uranium metal by ultrafast cooling. The double-phase (α+γ) structure with predominance of the α-phase was obtained in the alloys with 0–10at.% Mo. Increasing further Mo doping leads to the γ° phase (for 11–12at.% Mo) and pure cubic γ phase (for 15at.% Mo). The superconducting transition was investigated by low-temperature resistivity measurements down to 0.3K in magnetic fields up to 5T. All the splats become superconducting with Tc in the range from 1.24K (pure U splat) to 2.11K (U-15at.% Mo). The superconductivity in the γ-phase alloys exhibited a much higher upper critical field than for α-phase material. Electrical resistivity of the γ-alloys (⩾11at.% Mo) exhibited a negative temperature coefficient from room temperature down to the superconducting transition. |
| doi_str_mv | 10.1016/j.jallcom.2012.04.028 |
| format | article |
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U-Mo alloys with Mo concentration in the range of 0–15at.% Mo were prepared using a splat-cooling technique. Phase analysis using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron back-scatter diffraction (EBSD) revealed the presence of a small amount of γ-U phase retained at room temperature alongside the majority α-U phase and opening the possibility of stabilizing the γ-phase at room temperature in uranium metal by ultrafast cooling. The double-phase (α+γ) structure with predominance of the α-phase was obtained in the alloys with 0–10at.% Mo. Increasing further Mo doping leads to the γ° phase (for 11–12at.% Mo) and pure cubic γ phase (for 15at.% Mo). The superconducting transition was investigated by low-temperature resistivity measurements down to 0.3K in magnetic fields up to 5T. All the splats become superconducting with Tc in the range from 1.24K (pure U splat) to 2.11K (U-15at.% Mo). The superconductivity in the γ-phase alloys exhibited a much higher upper critical field than for α-phase material. Electrical resistivity of the γ-alloys (⩾11at.% Mo) exhibited a negative temperature coefficient from room temperature down to the superconducting transition.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2012.04.028</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>Alloys ; Condensed matter: structure, mechanical and thermal properties ; Cooling ; Electrical resistivity ; Electron back scatter diffraction ; Exact sciences and technology ; Inorganic compounds ; Molybdenum base alloys ; Physics ; Scanning electron microscopy ; Structure of solids and liquids; crystallography ; Structure of specific crystalline solids ; Superconductivity ; U-Mo alloys ; Uranium ; γ-Uphase</subject><ispartof>Journal of alloys and compounds, 2012-09, Vol.534, p.101-109</ispartof><rights>2012 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c372t-efa0c9ee06bc2e02f9a233515253b1639228147c91d522b36bcf70fd0d52f1953</citedby><cites>FETCH-LOGICAL-c372t-efa0c9ee06bc2e02f9a233515253b1639228147c91d522b36bcf70fd0d52f1953</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,27957,27958</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26050420$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Tkach, I.</creatorcontrib><creatorcontrib>Kim-Ngan, N.-T.H.</creatorcontrib><creatorcontrib>Mašková, S.</creatorcontrib><creatorcontrib>Dzevenko, M.</creatorcontrib><creatorcontrib>Havela, L.</creatorcontrib><creatorcontrib>Warren, A.</creatorcontrib><creatorcontrib>Stitt, C.</creatorcontrib><creatorcontrib>Scott, T.</creatorcontrib><title>Characterization of cubic γ-phase uranium molybdenum alloys synthesized by ultrafast cooling</title><title>Journal of alloys and compounds</title><description>► U-Mo alloys prepared by splat cooling. ► A small amount of γ-phase was preserved in pure splat-cooled uranium specimen. ► Crystal structure characterized by X-ray diffraction and EBSD. ► A stability of γ-phase for alloys with 11–15at.% Mo. ► Superconducting transition, Tc=1.24K (pure-U) to 2.11K (U-15at.% Mo).
U-Mo alloys with Mo concentration in the range of 0–15at.% Mo were prepared using a splat-cooling technique. Phase analysis using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron back-scatter diffraction (EBSD) revealed the presence of a small amount of γ-U phase retained at room temperature alongside the majority α-U phase and opening the possibility of stabilizing the γ-phase at room temperature in uranium metal by ultrafast cooling. The double-phase (α+γ) structure with predominance of the α-phase was obtained in the alloys with 0–10at.% Mo. Increasing further Mo doping leads to the γ° phase (for 11–12at.% Mo) and pure cubic γ phase (for 15at.% Mo). The superconducting transition was investigated by low-temperature resistivity measurements down to 0.3K in magnetic fields up to 5T. All the splats become superconducting with Tc in the range from 1.24K (pure U splat) to 2.11K (U-15at.% Mo). The superconductivity in the γ-phase alloys exhibited a much higher upper critical field than for α-phase material. Electrical resistivity of the γ-alloys (⩾11at.% Mo) exhibited a negative temperature coefficient from room temperature down to the superconducting transition.</description><subject>Alloys</subject><subject>Condensed matter: structure, mechanical and thermal properties</subject><subject>Cooling</subject><subject>Electrical resistivity</subject><subject>Electron back scatter diffraction</subject><subject>Exact sciences and technology</subject><subject>Inorganic compounds</subject><subject>Molybdenum base alloys</subject><subject>Physics</subject><subject>Scanning electron microscopy</subject><subject>Structure of solids and liquids; crystallography</subject><subject>Structure of specific crystalline solids</subject><subject>Superconductivity</subject><subject>U-Mo alloys</subject><subject>Uranium</subject><subject>γ-Uphase</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkM-KFDEQh4MoOK4-gpCL4KXbSqXT030SGfwHC3vRo4R0uuJkSHfGpFvofS3fw2cyywxe91RV8FX9qI-x1wJqAaJ9d6pPJgQbpxpBYA1NDdg9YTvR7WXVtG3_lO2gR1V1suuesxc5nwBA9FLs2I_D0SRjF0r-3iw-zjw6btfBW_73T3U-mkx8TWb268SnGLZhpLm0JS9umedtXo6U_T2NfNj4GpZknMkLtzEGP_98yZ45EzK9utYb9v3Tx2-HL9Xt3eevhw-3lZV7XCpyBmxPBO1gkQBdb1BKJRQqOYhW9oidaPa2F6NCHGTB3B7cCGV0olfyhr293D2n-GulvOjJZ0shmJnimrUA2aEC2WJB1QW1KeacyOlz8pNJW4H0g0590led-kGnhkYXnWXvzTXCZGuCK06sz_-XsQUFDULh3l84Kv_-9pR0tp5mS6NPZBc9Rv9I0j80IY-z</recordid><startdate>20120905</startdate><enddate>20120905</enddate><creator>Tkach, I.</creator><creator>Kim-Ngan, N.-T.H.</creator><creator>Mašková, S.</creator><creator>Dzevenko, M.</creator><creator>Havela, L.</creator><creator>Warren, A.</creator><creator>Stitt, C.</creator><creator>Scott, T.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20120905</creationdate><title>Characterization of cubic γ-phase uranium molybdenum alloys synthesized by ultrafast cooling</title><author>Tkach, I. ; Kim-Ngan, N.-T.H. ; Mašková, S. ; Dzevenko, M. ; Havela, L. ; Warren, A. ; Stitt, C. ; Scott, T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c372t-efa0c9ee06bc2e02f9a233515253b1639228147c91d522b36bcf70fd0d52f1953</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Alloys</topic><topic>Condensed matter: structure, mechanical and thermal properties</topic><topic>Cooling</topic><topic>Electrical resistivity</topic><topic>Electron back scatter diffraction</topic><topic>Exact sciences and technology</topic><topic>Inorganic compounds</topic><topic>Molybdenum base alloys</topic><topic>Physics</topic><topic>Scanning electron microscopy</topic><topic>Structure of solids and liquids; crystallography</topic><topic>Structure of specific crystalline solids</topic><topic>Superconductivity</topic><topic>U-Mo alloys</topic><topic>Uranium</topic><topic>γ-Uphase</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tkach, I.</creatorcontrib><creatorcontrib>Kim-Ngan, N.-T.H.</creatorcontrib><creatorcontrib>Mašková, S.</creatorcontrib><creatorcontrib>Dzevenko, M.</creatorcontrib><creatorcontrib>Havela, L.</creatorcontrib><creatorcontrib>Warren, A.</creatorcontrib><creatorcontrib>Stitt, C.</creatorcontrib><creatorcontrib>Scott, T.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tkach, I.</au><au>Kim-Ngan, N.-T.H.</au><au>Mašková, S.</au><au>Dzevenko, M.</au><au>Havela, L.</au><au>Warren, A.</au><au>Stitt, C.</au><au>Scott, T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Characterization of cubic γ-phase uranium molybdenum alloys synthesized by ultrafast cooling</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2012-09-05</date><risdate>2012</risdate><volume>534</volume><spage>101</spage><epage>109</epage><pages>101-109</pages><issn>0925-8388</issn><eissn>1873-4669</eissn><notes>ObjectType-Article-2</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-1</notes><notes>content type line 23</notes><abstract>► U-Mo alloys prepared by splat cooling. ► A small amount of γ-phase was preserved in pure splat-cooled uranium specimen. ► Crystal structure characterized by X-ray diffraction and EBSD. ► A stability of γ-phase for alloys with 11–15at.% Mo. ► Superconducting transition, Tc=1.24K (pure-U) to 2.11K (U-15at.% Mo).
U-Mo alloys with Mo concentration in the range of 0–15at.% Mo were prepared using a splat-cooling technique. Phase analysis using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron back-scatter diffraction (EBSD) revealed the presence of a small amount of γ-U phase retained at room temperature alongside the majority α-U phase and opening the possibility of stabilizing the γ-phase at room temperature in uranium metal by ultrafast cooling. The double-phase (α+γ) structure with predominance of the α-phase was obtained in the alloys with 0–10at.% Mo. Increasing further Mo doping leads to the γ° phase (for 11–12at.% Mo) and pure cubic γ phase (for 15at.% Mo). The superconducting transition was investigated by low-temperature resistivity measurements down to 0.3K in magnetic fields up to 5T. All the splats become superconducting with Tc in the range from 1.24K (pure U splat) to 2.11K (U-15at.% Mo). The superconductivity in the γ-phase alloys exhibited a much higher upper critical field than for α-phase material. Electrical resistivity of the γ-alloys (⩾11at.% Mo) exhibited a negative temperature coefficient from room temperature down to the superconducting transition.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2012.04.028</doi><tpages>9</tpages></addata></record> |
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| ispartof | Journal of alloys and compounds, 2012-09, Vol.534, p.101-109 |
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| subjects | Alloys Condensed matter: structure, mechanical and thermal properties Cooling Electrical resistivity Electron back scatter diffraction Exact sciences and technology Inorganic compounds Molybdenum base alloys Physics Scanning electron microscopy Structure of solids and liquids crystallography Structure of specific crystalline solids Superconductivity U-Mo alloys Uranium γ-Uphase |
| title | Characterization of cubic γ-phase uranium molybdenum alloys synthesized by ultrafast cooling |
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