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【英文标准名称】:StandardTestMethodforThermalDiffusivityofCarbonandGraphitebyThermalPulseMethod
【原文标准名称】:用热脉冲法测定炭和石墨的热扩散系数的标准试验方法
【标准号】:ASTMC714-2005e1
【标准状态】:现行
【国别】:
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.F0
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:碳;石墨;核能;耐火材料;试验;导热性;热导参数;热扩散系数
【英文主题词】:carbon;graphite;thermalconductivity;thermaldiffusivity
【摘要】:3.1Thermaldiffusivityisanimportantpropertyrequiredforsuchpurposesasdesignapplicationsundertransientheatflowconditions,determinationofsafeoperatingtemperature,processcontrol,andqualityassurance.3.2Theflashmethodisusedtomeasurevaluesofthermaldiffusivity(x03B1;)ofawiderangeofsolidmaterials.Itisparticularlyadvantageousbecauseofthesimplespecimengeometry,smallspecimensizerequirements,rapidityofmeasurement,andeaseofhandlingmaterialshavingawiderangeofthermaldiffusivityvaluesoveralargetemperaturerangewithasingleapparatus.Theshortmeasurementtimesinvolvedreducethechancesofcontaminationandchangeofspecimenpropertiesduetoexposuretohightemperatureenvironments.3.3Thermaldiffusivityresultsinmanycasescanbecombinedwithvaluesforspecificheat(Cp)anddensity(x03C1;)andusedtoderivethermalconductivity(x03BB;)fromtherelationx03BB;=x03B1;Cpx03C1;.Thistestmethodcanbeusedtocharacterizegraphitefordesignpurposes.1.1Thistestmethodcoversthedeterminationofthethermaldiffusivityofcarbonsandgraphiteto5%attemperaturesupto500C.Itrequiresonlyasmalleasilyfabricatedspecimen.Thermaldiffusivityvaluesintherangefrom0.04to2.0cm2/sarereadilymeasurablebythistestmethod;however,forthereasonoutlinedinSection5,formaterialsoutsidethisrangethistestmethodmayrequiremodification.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q51
【国际标准分类号】:
【页数】:4P.;A4
【正文语种】: