【英文标准名称】:Superconductivity-Part1:Criticalcurrentmeasurement-DCcriticalcurrentofNb-Ticompositesuperconductors
【原文标准名称】:超导性.第1部分:临界电流测量.铌-钛复合超导体的临界直流电流
【标准号】:IEC61788-1-2006
【标准状态】:现行
【国别】:国际
【发布日期】:2006-11
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC90
【标准类型】:()
【标准水平】:()
【中文主题词】:铜;临界电流;临界数据;电流测量;定义;直流电流;电气工程;测量;测量技术;铌;超导性;超导体;试验;钛
【英文主题词】:Copper;Criticalcurrent;Criticalitydata;Currentmeasurement;Definitions;Directcurrent;Electricalengineering;Interpretations;Measuredvalue;Measurement;Measuringcoils;Measuringtechniques;Niobium;Specimenpreparation;Superconductivity;Superconductors;Testing;Testingdevices;Titanium
【摘要】:ThispartofIEC61788coversatestmethodforthedeterminationofthed.c.criticalcurrentofeitherCu/Nb-Ticompositesuperconductorsthathaveacopper/superconductorratiolargerthan1orCu/Cu-Ni/Nb-Tiwiresthathaveacopper/superconductorratiolargerthan0,9andacopperalloy(Cu-Ni)/superconductorratiolargerthan0,2,wherethediameterofNb-Tisuperconductingfilamentsislargerthan1μm.ThechangesfortheCu/Cu-Ni/Nb-TiaredescribedinAnnexC.TheCu-NiusesallofthemainpartofthestandardwiththeexceptionslistedinAnnexCthatreplace(andinsomecasesarecounterto)someofthestepsinthemaintext.Thismethodisintendedforusewithsuperconductorsthathavecriticalcurrentslessthan1000Aandn-valueslargerthan12,understandardtestconditionsandatmagneticfieldslessthanorequalto0,7oftheuppercriticalmagneticfield.Thetestspecimenisimmersedinaliquidheliumbathataknowntemperatureduringtesting.Thetestconductorhasamonolithicstructurewitharoundorrectangularcross-sectionalareathatislessthan2mm2.Thespecimengeometryusedinthistestmethodisaninductivelycoiledspecimen.Deviationsfromthistestmethodthatareallowedforroutinetestsandotherspecificrestrictionsaregiveninthisstandard.Testconductorswithcriticalcurrentsabove1000Aorcross-sectionalareasgreaterthan2mm2couldbemeasuredwiththepresentmethodwithananticipatedincreaseinuncertaintyandamoresignificantself-fieldeffect(seeAnnexB).Other,morespecialized,specimentestgeometriesmaybemoreappropriateforlargerconductortestingwhichhavebeenomittedfromthispresentstandardforsimplicityandtoretainaloweruncertainty.Thetestmethodgiveninthisstandardisexpectedtoapplytoothersuperconductingcompositewiresaftersomeappropriatemodifications.
【中国标准分类号】:K10
【国际标准分类号】:17_220;29_050
【页数】:57P;A4
【正文语种】:英语