ASTM B330-2007 测定金属粉末和相关化合物的费歇尔值的标准试验方法

作者:标准资料网 时间:2024-05-27 15:27:18  浏览:9021   来源:标准资料网

【英文标准名称】:StandardTestMethodforFisherNumberofMetalPowdersandRelatedCompounds
【原文标准名称】:测定金属粉末和相关化合物的费歇尔值的标准试验方法
【标准号】:ASTMB330-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:金属粉末;金属;粒度测量;测试
【英文主题词】:envelope-specificsurfacearea;FisherNumber;metalpowder;particlesize;porosity;powder;specificsurface
【摘要】:Thistestmethodprovidesaprocedurefordeterminingtheenvelope-specificsurfaceareaofpowders,fromwhichiscalculatedanx201C;averagex201D;particlediameter,assumingtheparticlesaremonosize,smoothsurface,nonporous,sphericalparticles.Forthisreason,valuesobtainedbythistestmethodwillbedefinedasaFisherNumber.Thedegreeofcorrelationbetweentheresultsofthistestmethodandthequalityofpowdersinusewillvarywitheachparticularapplicationandhasnotbeenfullydetermined.Thistestmethodisgenerallyapplicabletoallmetalpowdersandrelatedcompounds,includingcarbides,nitrides,andoxides,forparticleshavingdiametersbetween0.5and50x03BC;m.Itshouldnotbeusedforpowderscomposedofparticleswhoseshapeistoofarfromequiaxed,thatis,flakesorfibers.Inthesecases,itispermissibletousethetestmethoddescribedonlybyagreementbetweenthepartiesconcerned.Thistestmethodshallnotbeusedformixturesofdifferentpowdersnorforpowderscontainingbindersorlubricants.Whenthepowdercontainsagglomerates,themeasuredsurfaceareamaybeaffectedbythedegreeofagglomeration.Methodsofde-agglomerationsuchasthatreferencedin1.1maybeusedifagreeduponbetweenthepartiesconcerned.Whenanx201C;averagex201D;particlesizeofpowdersisdeterminedusingtheFishersub-sievesizer,itshouldbeclearlykeptinmindthatthisaveragesizeisderivedfromthedeterminationofthespecificsurfaceareaofthepowderusingarelationshipthatistrueonlyforpowdersofuniformsizeandsphericalshape.1.1Thistestmethodusesairpermeabilitytodetermineanenvelope-specificsurfaceareaanditsassociatedaverageequivalentsphericaldiameter(from0.5to50m)ofmetalpowdersandrelatedcompounds.Thepowdersmaybeanalyzedintheir"as-supplied"(shipped,received,orprocessed)conditionoraftertheyhavebeende-agglomeratedormilledbyalaboratoryprocedure("labmilled")suchasthatspecifiedinPracticeB859.Thevaluesobtainedarenotintendedtobeabsolutebutaregenerallyusefulonarelativebasisforcontrolpurposes.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H71
【国际标准分类号】:77_160
【页数】:5P.;A4
【正文语种】: