Designation:C1494−13StandardTestMethodsforDeterminationofMassFractionofCarbon,Nitrogen,andOxygeninSiliconNitridePowder1ThisstandardisissuedunderthefixeddesignationC1494;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscoverthedeterminationofmassfraction%ofcarbon,nitrogenandoxygeninsiliconnitridepowderhavingchemicalcompositionswithinthefollowinglimits:ElementMassFraction%RangeCarbon0.05to5.0Nitrogen30to45Oxygen0.1to1.51.2Twotestmethodsappearinthisstandard.1.2.1TotalCarbonbytheDirectCombustion-InfraredMea-surementMethod.1.2.2NitrogenbytheInertGasFusion-ThermalConductiv-ityMeasurementMethodandOxygenbytheInertGasFusion-InfraredMeasurementMethod.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecifichazardstatementsaregiveninSection6.2.ReferencedDocuments2.1ASTMStandards:2E29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE50PracticesforApparatus,Reagents,andSafetyConsid-erationsforChemicalAnalysisofMetals,Ores,andRelatedMaterialsE1019TestMethodsforDeterminationofCarbon,Sulfur,Nitrogen,andOxygeninSteel,Iron,Nickel,andCobaltAlloysbyVariousCombustionandFusionTechniquesE1806PracticeforSamplingSteelandIronforDetermina-tionofChemicalComposition3.SignificanceandUse3.1Thesetestmethodsareforthechemicalanalysisofmassfractionofcarbon,nitrogenandoxygeninsiliconnitridepowder.Theyareusedinresearch,development,production,acceptance,andqualitycontrolofsiliconnitridepowdersusedtoproduceceramiccomponentswithsiliconnitridecontent.3.2Itisassumedthatallwhousethesetestmethodswillbetrainedanalysts,capableofperformingcommonlaboratoryp...
