【英文标准名称】:Advancedtechnicalceramics-Monolithicceramics-Generalandtexturalproperties-Part5:Determinationofphasevolumefractionbyevaluationofmicrographs
【原文标准名称】:高级工业陶瓷.单片陶瓷.一般和结构特性.第5部分:利用显微图像评估法测定相体积分数
【标准号】:BSEN623-5-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2009-08-31
【实施或试行日期】:2009-08-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:高级工业陶瓷;陶瓷;定义(术语);测定;蒸馏物;粒度;仪器;数学计算;测量;测量技术;缩微照相;微观结构;整体材料;粒径分析;显微摄影;特性;质量;试样制备;结构;试验设备;测试
【英文主题词】:Advancedtechnicalceramics;Ceramics;Definitions;Determination;Fractions;Grainsize;Instruments;Mathematicalcalculations;Measurement;Measuringtechniques;Micrographics;Microstructure;Monolithicmaterials;Particlesizeanalysis;Photomicrography;Properties;Quality;Specimenpreparation;Structure;Testequipment;Testing
【摘要】:ThispartofEN623specifiesamanualmethodofmakingmeasurementsforthedeterminationofvolumefractionofmajorphasesinadvancedtechnicalceramicsusingmicrographsofpolishedandetchedsections,overlayingasquaregridoflines,andcountingthenumberofintersectionslyingovereachphase.NOTE1Thismethodassumesthatthetruephasevolumefractionsareequivalenttoareafractionsonarandomlycutcrosssectionaccordingtostereologicalprinciples.NOTE2GuidelinesforpolishingandetchingofadvancedtechnicalceramicscanbefoundinAnnexesAandB.Themethodappliestoceramicswithoneormoredistinctsecondaryphases,suchasfoundinAl2O3/ZrO2,Si/SiC,orAl2O3/SiCw.Ifthetestmaterialcontainsdiscretepores,thesecanbetreatedasasecondaryphaseforthepurposeofthismethodprovidedthatthereisnoevidenceofgrainpluck-outduringpolishingbeingconfusedwithgenuinepores.NOTE3Ifthematerialcontainsmorethanabout20%porositythereisastrongriskthatthemicrostructurewillbedamagedduringthepolishingprocess,andmeasurementofvolumefractionofporesmaybecomemisleading.Secondaryphasevolumefractionsorporositypresentatlevelsoflessthan0,05aresubjecttoconsiderableerrorandpotentialscatterinresults.Alargernumberofmicrographsthantheminimumofthreeisnormallyneededtoimprovetheconsistencyandaccuracyoftheresults.NOTE4Manyceramicscontainsmallamountsofsecondaryglassyphases.Inordertomakeareasonableestimateofglassyphasecontent,theglassmaterialbetweencrystallinegrainsshouldbereadilyobservable,andthusshouldbeatleast0,5μminwidth.ThemethodinthisEuropeanStandardisnotconsideredappropriatefornarrowglassyfilmsaroundgrains.Thismethodassumesthattheselectedregionsofapreparedcross-sectionarestatisticallyrepresentativeofthewholesampledsection.NOTE5Microstructuresareseldomhomogeneous,andthephasecontentscanvaryfrommicrographtomicrograph.Itisessentialtosurveyasufficientlywideareaofthepreparedsectiontoensurethatthoseareasselectedforevaluationarerepresentative,anddonotcontaineye-catchingirregularities.SomeusersofthisEuropeanStandardcanwishtoapplyautomaticorsemiautomaticimageanalysistomicrographsordirectlycapturedmicrostructuralimages.ThisiscurrentlyoutsidethescopeofthisEuropeanStandard,butsomeguidelinesaregiveninAnnexC.
【中国标准分类号】:Q32
【国际标准分类号】:81_060_30
【页数】:22P.;A4
【正文语种】:英语