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《不同纯度硼粉搭配对MgB2多芯线材性能的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第35卷第1期低温物理学报Vo1.35,No.12013年2月CHINESEJ0URNAL0FLOWTEMPERATUREPHYS1CSFebruary2013不同纯度硼粉搭配对MgB2多芯线材性能的影响*刘国庆冯建情孙昱艳。庞玉春。贾佳林王庆阳杨芳闫果李成山西北有色金属研究院,西安710016;东北大学材料与冶金学院,沈阳110004;。宝胜科技创新股份有限公司,江苏宝应225800;西部超导材料科技有限公司,西安710018收稿日期:2012—08—14;修回日期:201204—15【摘要】采用in-situP
2、IT工艺,以不同纯度硼粉相互搭配做为前驱粉末中的硼源,选用中心铜铌复合棒增强的导体结构制备了MgBz/\~e,线材,研究了不同纯度硼粉搭配对线材粉末相组成、微观结构以及超导电性的影响,其结果表明当高纯硼粉含量不低于50%时,自场下的临界电流不存在明显的衰减,因此以适当低纯硼粉(95~97~//o)和高纯硼粉(99.999%)相互搭配不但不会降低线材的临界电流,而且可以很大程度上降低线材的制造成本,为线材的实用化提供了很好的经济基础.关键词:微观结构,超导电性,Mg多芯线材PACC:743OF,7470L,8140E
3、FFECTSOFPRoPORTIoNALBMIXTUREONMICRoSTRUCTUREANDSUPERCONDUCTINGPROPERTIESOFMgB2WIRESLIUGuo-qingFENGJian-qingSUNYu-yanzPANGYu—chunaJIAJia一1inWANGQing-yangYANGFangYANGuoLICheng—shanNothwestInstituteForN0ferrousMetalResearch.Xi,an710016:NortheasternUniversitySchoo
4、lofmaterialsandmetallurgy,Shenyang110004;。BaoshengScienceandTechnologyInnovationCo.,Ltd,JiangsuBaoying225800;WesternS声Prc0d“以ngTechnologiesCo.,Ltd,Xi,an710018Receiveddate:2012—0814;revisedmanuscriptreceiveddate:201204—15[Abstract]EffectsofBpowdermixturebyfourp
5、roportionsoftwodifferentpuritiesonthephasecompositions,microstructureandthesuperconductingpropertiesofthe6-filamentMgBewiresenhancedbyCu-Nbcorewereinves—tigated.Ithasbeenfoundthatnoobviousdeclineofcriticalcurrentwasobservedinthewiresampleswithhighpuri—tyBpowde
6、rI10lessthan50content.Therefore,theBpowdermixtureintheprecursorbyasuitableproportionofhighandloWpurityBcontributestothemanufacturingcostsavingwithoutthereductioninthetransportcurrentcarryingabilitiesoftheMgB2wires.Thewiresampleswereallpreparedbystandardin-situ
7、PIT(PowderinTube)method.国家”973”计划(2OllCBAOOlO4),陕西省”13115”重大专项(2010ZDKG-32)及江苏省产学研联合创新资金(BY2010149)资助的课题.ProjectsupportedbytheNationalProgramforHighTechnologyResearchandDevelopment(GrandNo.201lCBAO01O4),ShaanxiProvincial”13115”ScientificandTechnologicalInnovat
8、ion(GrandNo.2010ZDKG-32),andIndustry-AcademiaCooperationInnovationFundProjectsofJiangsuProvince(GrandNo.BY2O1O149)第1期刘国庆等:不同纯度硼粉搭配对MgB2多芯线材性能的影响23Keywords:microstructure,supercondu
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