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【英文标准名称】:StandardTestMethodforParticleSizeDistributionofMetalPowdersandRelatedCompoundsbyLightScattering
【原文标准名称】:用光散射作金属粉末和相关化合物的粒度分布测试的标准试验方法
【标准号】:ASTMB822-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:B09.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:laserdiffraction;lightscattering;metalpowders;particlesizedistribution;powdermetallurgy;NumberCode19.120(Particlesizeanalysis.Sieving)
【摘要】:Reportedparticlesizemeasurementisafunctionofboththeactualparticledimensionandshapefactoraswellastheparticularphysicalorchemicalpropertiesbeingmeasured.Cautionisrequiredwhencomparingdatafrominstrumentsoperatingondifferentphysicalorchemicalparametersorwithdifferentparticlesizemeasurementranges.Sampleacquisition,handling,andpreparationcanalsoaffectreportedparticlesizeresults.5.1.1Itisimportanttorecognizethattheresultsobtainedbythistestmethod,oranyothermethodforparticlesizedeterminationusingdifferentphysicalprinciples,maydisagree.Theresultsarestronglyinfluencedbythephysicalprinciplesemployedbyeachmethodofparticlesizeanalysis.Theresultsofanyparticlesizingmethodshouldbeusedonlyinarelativesense;theyshouldnotberegardedasabsolutewhencomparingresultsobtainedbyothermethods.Lightscatteringtheoryhasbeenavailableformanyyearsforuseinthedeterminationofparticlesize.Severalmanufacturersoftestingequipmentnowhaveunitsbasedontheseprinciples.Althougheachtypeoftestingequipmentusesthesamebasicprinciplesforlightscatteringasafunctionofparticlesize,differentassumptionspertinenttoapplicationofthetheory,anddifferentmodelsforconvertinglightmeasurementstoparticlesize,mayleadtodifferentresultsforeachinstrument.Therefore,theuseofthistestmethodcannotguaranteedirectlycomparableresultsfromdifferenttypesofinstruments.Knowledgeoftheparticlesizedistributionofmetalpowdersisusefulinpredictingthepowder-processingbehaviorandultimateperformanceofpowdermetallurgyparts.Particlesizedistributionisrelatedcloselytotheflowability,moldability,compressibility,anddie-fillingcharacteristicsofapowder,aswellastothefinalstructureandpropertiesoffinishedpowdermetallurgy(P/M)parts.Thistestmethodisusefultobothsuppliersandusersofpowdersindeterminingtheparticlesizedistributionsforproductspecifications,manufacturingcontrol,development,andresearch.Thistestmethodmaybeusedtoobtaindataforcomparisonbetweenlotsofthesamematerialorforestablishingconformance,asinacceptancetesting.1.1Thistestmethodcoversthedeterminationoftheparticlesizedistributionbylightscattering,reportedasvolumepercent,ofparticulatematerialsincludingmetalsandcompounds.1.2Thistestmethodappliestoanalyseswithbothaqueousandnonaqueousdispersions.Inaddition,analysiscanbeperformedwithagaseousdispersionformaterialsthatarehygroscopicorreactwithaliquidcarrier.1.3Thistestmethodisapplicabletothemeasurementofparticulatematerialsintherangeof0.4to2000m,orasubsetofthatrange,asapplicabletotheparticlesizedistributionbeingmeasured.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A42
【国际标准分类号】:19_120
【页数】:3P.;A4
【正文语种】: