ASTM B922-2010 物理吸附法测定金属粉末比表面积的标准试验方法

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【英文标准名称】:StandardTestMethodforMetalPowderSpecificSurfaceAreabyPhysicalAdsorption
【原文标准名称】:物理吸附法测定金属粉末比表面积的标准试验方法
【标准号】:ASTMB922-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:B09.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:BETsurfacearea;metalpowders;multipointsurfacearea;outgassing;physicaladsorption;refractorymetalpowders;singlepointsurfacearea;specificsurfacearea;surfacearea;BET(Brunauer,Emmett,andTeller)surfacearea;Metalpowders;Multipoint
【摘要】:Bothsuppliersandusersofmetalscanbenefitfromknowledgeofthesurfaceareaofthesematerials.Resultsofmanyintermediateandfinalprocessingstepsarecontrolledby,orrelatedto,specificsurfaceareaofthemetal.Theperformanceofmanysinteredorcastmetalstructuresmaybepredictedfromthespecificsurfaceareaofthestartingmetalpowder,oralloraportionofthefinishedpiece.1.1Thistestmethodcoversdeterminationofsurfaceareaofmetalpowders.Thetestmethodspecifiesgeneralproceduresthatareapplicabletomanycommercialphysicaladsorptioninstruments.Themethodprovidesspecificsampleoutgassingproceduresforlistedmaterials.Itincludesadditionalgeneraloutgassinginstructionsforothermetals.ThemultipointequationofBrunauer,EmmettandTeller(BET),alongwiththesinglepointapproximationoftheBETequation,formsthebasisforallcalculations.1.2Thistestmethoddoesnotincludeallexistingproceduresappropriateforoutgassingmetallicmaterials.Theproceduresincludedprovidedacceptableresultsforsamplesanalyzedduringinterlaboratorytesting.Theinvestigatorshalldeterminetheappropriatenessoflistedprocedures.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3.1StateallnumericalvaluesintermsofSIunitsunlessspecificinstrumentationsoftwarereportssurfaceareausingalternateunits.Inthiscase,presentbothreportedandequivalentSIunitsinthefinalwrittenreport.Manyinstrumentsreportsurfaceareaasm2/g,insteadofusingcorrectSIunits(m2/kg).1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H16
【国际标准分类号】:77_160
【页数】:4P.;A4
【正文语种】:英语