DD 79-1981 高导电性铜螺旋拉伸试验的操作方法
时间:2024-05-21 07:16:26 来源: 标准资料网 作者：标准资料网 阅读：8176
【英文标准名称】:Methodforperformingthespiralelongationtestonhighconductivitycopper
【原文标准名称】:高导电性铜螺旋拉伸试验的操作方法
【标准号】:DD79-1981
【标准状态】:作废
【国别】:英国
【发布日期】:1981-10-30
【实施或试行日期】:1981-10-30
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:铜;热处理;机械试验;直径;试样;试样制备;螺形;导电体;尺寸;延伸;退火
【英文主题词】:dimensions;diameter;specimenpreparation;elongation;heattreatment;mechanicaltesting;testspecimens;spiralshape;annealing;copper;electricconductors
【摘要】:
【中国标准分类号】:H22
【国际标准分类号】:77_040_99
【页数】:8P;A4
【正文语种】:英语
【英文标准名称】:Superconductivity-Part2:Criticalcurrentmeasurement-DCcriticalcurrentofNbSncompositesuperconductors
【原文标准名称】:超导体第2部分:临界电流测量铌(3号)/锡复合超导体的临界直流电流
【标准号】:IEC61788-2-1999
【标准状态】:作废
【国别】:国际
【发布日期】:1999-03
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC90
【标准类型】:()
【标准水平】:()
【中文主题词】:铌;超导性;超导体;电气工程;临界数据;测量;电流测量
【英文主题词】:
【摘要】:ThispartofIEC61788coversatestmethodforthedeterminationofthed.c.criticalcurrentofNb3Sncompositesuperconductorswhicharefabricatedbyeitherthebronzeprocessortheinternaltindiffusionprocessandhaveacopper/non-copperratiolargerthan0,2.Thismethodisintendedforusewithsuperconductorswhichhavecriticalcurrentsoflessthan1000Aandn-valueslargerthan12understandardtestconditionsandatmagneticfieldsoflessthanorequalto0,7timestheuppercriticalmagneticfield.Thetestspecimenisimmersedinaliquidheliumbathatameasuredtemperatureduringtesting.TheNb3Sncompositetestconductorhasamonolithicstructurewithatotalround-cross-sectionalareathatislessthan2mm.Thespecimengeometryusedinthistestmethodisaninductivelycoiledspecimen.Deviationsfromthistestmethodthatareallowedforroutinetestsandotherspecificrestrictionsaregiveninthisstandard.Nb3Snconductorswithcriticalcurrentsabove1000Aortotalcross-sectionalareasgreaterthan2mmcanbemeasuredwiththepresentmethodwithananticipatedreductioninprecisionandamoresignificantself-fieldeffect(seeannexC).Other,morespecialized,specimentestgeometriesmaybemoreappropriateforlargerconductortestingwhichhavebeenomittedfromthispresentstandardforsimplicityandtoretainprecision.ThetestmethodgiveninthisstandardshouldinprincipleapplytoNb3Sncompositewiresfabricatedbyanyotherprocess,suchasthemodifiedjelly-rollprocess.Thismethodisalsoexpectedtoapplytoothersuperconductingcompositewiresaftersomeappropriatemodifications.
【中国标准分类号】:L47
【国际标准分类号】:29_050
【页数】:57P;A4
【正文语种】:英语