{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282681468589056.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2320/jinstmet1952.61.9_829"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"4304585"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/4304585"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I4304585"}},{"identifier":{"@type":"URI","@value":"https://www.jstage.jst.go.jp/article/jinstmet1952/61/9/61_9_829/_pdf"}},{"identifier":{"@type":"NAID","@value":"130007342400"}},{"identifier":{"@type":"NAID","@value":"10001967507"}}],"dc:title":[{"@language":"ja","@value":"過飽和bcc固溶体からの析出により作製したNb<SUB>3</SUB>Al極細多芯超伝導線"},{"@language":"en","@value":"Nb<SUB>3</SUB>Al Multifilamentary Superconducting Wires Transformed from Supersaturated bcc Solid Solution"},{"@value":"過飽和bcc固溶体からの析出により作製したNb3Al極細多芯超伝導線"},{"@language":"ja-Kana","@value":"カホウワ bcc コヨウタイ カラ ノ セキシュツ ニ ヨリ サクセイシタ N"}],"description":[{"type":"abstract","notation":[{"@language":"en","@value":"Since Nb<SUB>3</SUB>Al shows better strain-tolerances of superconducting properties than those of Nb<SUB>3</SUB>Sn, the Nb<SUB>3</SUB>Al multifilamentary wire is one of the most promising candidate superconductors for the large-scaled high-field superconducting applications. Although the Nb<SUB>3</SUB>Al conductors with off-stoichiometric compositions fabricated by low-temperature diffusion reaction show higher <I>J</I><SUB>c</SUB> values in fields below 14 T, their <I>J</I><SUB>c</SUB> values rapidly decrease in high fields above 14 T due to their relatively low <I>H</I><SUB>c2</SUB> (4.2 K) caused by their off-stoichiometric compositions. On the other hand the Nb<SUB>3</SUB>Al fabricated at high temperatures has a stoichiometric composition and improved <I>H</I><SUB>c2</SUB> but shows relatively low <I>J</I><SUB>c</SUB>. Recently, we developed a new fabrication process of Nb<SUB>3</SUB>Al multifilamentary wire, in which Nb/Al-5 at%Mg multifilamentary composite wires were rapidly heated up to 2300 K and rapidly quenched to obtain composite wires including many Nb-Al supersaturated bcc filaments. Then, the resulting composites were annealed to form Nb<SUB>3</SUB>Al filaments through the deposition from the metastable Nb-Al bcc filaments. When the Al-5 at%Mg alloy core diameters were about 0.56 μm, the wire showed the highest <I>T</I><SUB>c</SUB> and the highest <I>J</I><SUB>c</SUB> (20 T, 4.2 K) of 17.4 K and 2.5×10<SUP>8</SUP> A/m<SUP>2</SUP>, respectively. The optimized <I>J</I><SUB>c</SUB> values are 2∼3 times higher than those of the commercially available (Nb, Ti)<SUB>3</SUB>Sn multifilamentary wires. Small mechanical deformation (bending, twisting, and stranding) of the as-quenched composite wires did not degrade the superconducting properties of the final Nb<SUB>3</SUB>Al multifilamentary wires, which proves the good ductility of the supersaturated bcc filaments. Reducing temperature from 4.2 to 2.1 K shifted the <I>J</I><SUB>c</SUB>-<I>B</I> curves to the higher magnetic field by 2.1∼2.5 T and increased the <I>n</I>-index in the voltage-current characteristics from 14.3 to 31.7 at 20 T. All the test results indicate that the new wire is one of the most promising materials having a hopeful future in the various practical superconducting applications in high fields."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410282681468589058","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000019007297"},{"@type":"NRID","@value":"9000392811413"}],"foaf:name":[{"@language":"ja","@value":"飯嶋 安男"},{"@language":"en","@value":"Iijima Yasuo"}],"jpcoar:affiliationName":[{"@language":"en","@value":"National Research Institute for Metals"},{"@language":"ja","@value":"金属材料技術研究所"}]},{"@id":"https://cir.nii.ac.jp/crid/1410001204186390146","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000003445615"},{"@type":"NRID","@value":"9000392801020"},{"@type":"NRID","@value":"9000392811657"},{"@type":"NRID","@value":"9000392811327"},{"@type":"NRID","@value":"9000392811990"},{"@type":"NRID","@value":"9000392803739"},{"@type":"NRID","@value":"9000392811331"},{"@type":"NRID","@value":"9000392811414"},{"@type":"NRID","@value":"9000392809169"},{"@type":"NRID","@value":"9000258198508"},{"@type":"NRID","@value":"9000392805622"},{"@type":"NRID","@value":"9000401893362"},{"@type":"NRID","@value":"9000252828700"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0003560"}],"foaf:name":[{"@language":"ja","@value":"竹内 孝夫"},{"@language":"en","@value":"Takeuchi Takao"}],"jpcoar:affiliationName":[{"@language":"en","@value":"National Research Institute for Metals"},{"@language":"ja","@value":"金属材料技術研究所"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282681468589056","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000003439174"},{"@type":"NRID","@value":"9000392811415"}],"foaf:name":[{"@language":"ja","@value":"井上 廉"},{"@language":"en","@value":"Inoue Kiyoshi"}],"jpcoar:affiliationName":[{"@language":"en","@value":"National Research Institute for Metals"},{"@language":"ja","@value":"金属材料技術研究所"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00214876"},{"@type":"LISSN","@value":"00214876"},{"@type":"EISSN","@value":"18806880"},{"@type":"EISSN","@value":"24337501"},{"@type":"NDL_BIB_ID","@value":"000000018323"},{"@type":"ISSN","@value":"00214876"},{"@type":"NCID","@value":"AN00187860"}],"prism:publicationName":[{"@language":"ja","@value":"日本金属学会誌"},{"@language":"en","@value":"Journal of the Japan Institute of Metals and Materials"},{"@language":"en","@value":"J. Japan Inst. Metals"},{"@language":"en","@value":"J. Japan Inst. Metals and Materials"},{"@language":"en","@value":"Journal of the Japan Institute of Metals"},{"@language":"ja","@value":"日本金属学会誌"},{"@language":"en","@value":"J.Japan Inst.Metals"},{"@language":"ja","@value":"日本金屬學會誌"}],"dc:publisher":[{"@language":"en","@value":"The Japan Institute of Metals and Materials"},{"@language":"ja","@value":"公益社団法人 日本金属学会"}],"prism:publicationDate":"1997","prism:volume":"61","prism:number":"9","prism:startingPage":"829","prism:endingPage":"835"},"reviewed":"false","url":[{"@id":"http://id.ndl.go.jp/bib/4304585"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I4304585"},{"@id":"https://www.jstage.jst.go.jp/article/jinstmet1952/61/9/61_9_829/_pdf"}],"availableAt":"1997","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=multifilamentary%20superconductor","dc:title":"multifilamentary superconductor"},{"@id":"https://cir.nii.ac.jp/all?q=Nb%3CSUB%3E3%3C/SUB%3EAl","dc:title":"Nb<SUB>3</SUB>Al"},{"@id":"https://cir.nii.ac.jp/all?q=rapid%20quench","dc:title":"rapid quench"},{"@id":"https://cir.nii.ac.jp/all?q=supersaturated%20bcc%20solid%20solution","dc:title":"supersaturated bcc solid solution"},{"@id":"https://cir.nii.ac.jp/all?q=critical%20temperature","dc:title":"critical temperature"},{"@id":"https://cir.nii.ac.jp/all?q=critical%20current%20density","dc:title":"critical current density"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360299773107723264","@type":"Article","relationType":["cites"],"jpcoar:relatedTitle":[{"@value":"Development of Nb tube processed Nb3Al multifilamentary superconductor"}]},{"@id":"https://cir.nii.ac.jp/crid/1360581247790755200","@type":"Article","relationType":["cites"],"jpcoar:relatedTitle":[{"@value":"A quench-age method for the fabrication of Nb(Al) superconductors"}]},{"@id":"https://cir.nii.ac.jp/crid/1360855570629286784","@type":"Article","relationType":["cites"],"jpcoar:relatedTitle":[{"@value":"Fabrication of multifilamentary Nb-Al by a powder metallurgy process"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681468729600","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"急熱急冷法Nb<SUB>3</SUB>Al線材へのCu添加効果"},{"@language":"en","@value":"Effects of Cu Addition on Nb<SUB>3</SUB>Al Wires Prepared by Rapid Heating/Quenching"},{"@value":"急熱急冷法Nb3Al線材へのCu添加効果"},{"@language":"ja-Kana","@value":"キュウネツ キュウレイホウ Nb3Al センザイ エ ノ Cu テンカ コウカ"}]},{"@id":"https://cir.nii.ac.jp/crid/1520290885325160576","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@value":"固液界面反応によるNb3Al(Al5)相の形成過程"},{"@language":"ja-Kana","@value":"コエキ カイメン ハンノウ ニ ヨル Nb3Al Al5 ソウ ノ ケイセイ カテイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1570572699178409344","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1570854174134038272","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1571417124053971456","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1571698599064172672","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1572261549001844224","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1572261549017591040","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1572261549017594624","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1572543023994301056","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1573105973914232192","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1573105973947723648","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1573387448924434304","@type":"Article","relationType":["cites"]},{"@id":"https://cir.nii.ac.jp/crid/1573950398844365952","@type":"Article","relationType":["cites"]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2002215490"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I4304585"},{"@type":"CROSSREF","@value":"10.2320/jinstmet1952.61.9_829"},{"@type":"CIA","@value":"10001967507"},{"@type":"CIA","@value":"130007342400"}]}