ASTM-B822

Designation:B822–10StandardTestMethodforParticleSizeDistributionofMetalPowdersandRelatedCompoundsbyLightScattering1ThisstandardisissuedunderthefixeddesignationB822;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationoftheparticlesizedistributionbylightscattering,reportedasvolumeper-cent,ofparticulatematerialsincludingmetalsandcompounds.1.2Thistestmethodappliestoanalyseswithbothaqueousandnonaqueousdispersions.Inaddition,analysiscanbeperformedwithagaseousdispersionformaterialsthatarehygroscopicorreactwithaliquidcarrier.1.3Thistestmethodisapplicabletothemeasurementofparticulatematerialsintherangeof0.4to2000µm,orasubsetofthatrange,asapplicabletotheparticlesizedistributionbeingmeasured.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2B215PracticesforSamplingMetalPowdersB243TerminologyofPowderMetallurgyB821GuideforLiquidDispersionofMetalPowdersandRelatedCompoundsforParticleSizeAnalysisE1617PracticeforReportingParticleSizeCharacterizationData2.2ISOStandard:3ISO13320-1ParticleSizeAnalysis—LaserDiffractionMethods—Part1:GeneralPrinciples3.Terminology3.1Definitions—DefinitionsofpowdermetallurgytermscanbefoundinTerminologyB243.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1background—extraneousscatteringoflightbyele-mentsotherthantheparticlestobemeasured;includesscatteringbycontaminationinthemeasurementpath.3.2.2FraunhoferDiffraction—theopticaltheorythatde-scribesthelow-anglescatteringoflightbyparticlesthatarelargecomparedtothewavelengthoftheincidentlight.43.2.3MieScattering—thecomplexelectromagnetictheorythatdescribesthescatteringoflightbysphericalparticles.Itisusuallyappliedtoparticleswithdiametersthatareclosetothewavelengthoftheincidentlight.Therealandimaginaryindicesoflightrefractionoftheparticlesareneeded.43.2.4multiplescattering—therescatteringoflightbyaparticleinthepathoflightscatteredbyanotherparticle.Thisusuallyoccursinheavyconcentrationsofaparticledispersion.4.SummaryofTestMethod4.1Apreparedsampleofparticulatematerialisdispersedinwater,oracompatibleorganicliquid,andcirculatedthroughthepathofalightbeamorsomeothersuitablelightsource.Adrysamplemaybeaspiratedthroughthelightinacarriergas.Theparticlespassthroughthelightbeamandscatterit.Photodetectorarrayscollectthescatteredlightthatisconvertedtoelectricalsignals,whicharethenanalyzedinamicropro-cessor.ThesignalisconvertedtoasizedistributionusingFraunhoferDiffractionorMieScattering,oracombinationofboth.Scatteringinformationisanalyzedassumingasphericalmodel.Calculatedparticlesizesarethereforepresentedasequivalentsphericaldiameters.Additionalinformationpertain-ingtothegeneralprinciplesofparticlesizedistributionanalysisbylightscatteringcanbefoundinISOStandard13320-1.5.SignificanceandUse5.1Reportedparticlesizemeasurementisafunctionofboththeactualparticledimensionandshapefactoraswellasthe1ThistestmethodisunderthejurisdictionofASTMCommitteeB09onMetalPowdersandMetalPowderProductsandisthedirectresponsibilityofSubcom-mitteeB09.02onBaseMetalPowders.CurrenteditionapprovedMay1,2010.PublishedJune2010.OriginallypublishedasB822–92.LastpreviouseditionB822–02.DOI:10.1520/B0822-10.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.3AvailablefromAmericanNationalStandardsInstitute(ANSI),25W.43rdSt.,4thFloor,NewYork,NY10036,“IndustrialParticleSizeMeasurementUsingLightScattering,”OpticalEngineering,Vol19,No6,1980,pp.861–869.1*ASummaryofChangessectionappearsattheendofthisstandard.Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.ASTMInternationalProvidedbyIHSunderlicensewithASTMLicensee=COMAC,ShanghaiAviationIndustry(Group)CoLtd5973222NotforResale,2015/1/908:38:56NoreproductionornetworkingpermittedwithoutlicensefromIHS--`,``,``,,`,,`,,```,,``,-`-``,```,,,`---particularphysicalorchemicalpropertiesbeingmeasured.Cautionisrequiredwhencomparingdatafrominstrumentsoperatingondifferentphysicalorchemicalparametersorwithdifferentparticlesizemeasurementranges.Sampleacquisition,handling,andpreparationcanalsoaffectreportedparticlesizeresults.5.1.1Itisimportanttorecognizethattheresultsobtainedbythistestmethod,oranyothermethodforparticlesizedeter-minationusingdifferentphysicalprinciples,maydisagree.Theresultsarestronglyinfluencedbythephysicalprinciplesemployedbyeachmethodofparticlesizeanalysis.Theresultsofanyparticlesizingmethodshould