BS DD ENV 623-5-2002 高技术陶瓷.整体陶瓷.一般的和表面结构特性.通过显微摄影图评估测定相体积分数
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【英文标准名称】:Advancedtechnicalceramics-Monolithicceramics-Generalandtexturalproperties-Determinationofphasevolumefractionbyevaluationofmicrographs
【原文标准名称】:高技术陶瓷.整体陶瓷.一般的和表面结构特性.通过显微摄影图评估测定相体积分数
【标准号】:BSDDENV623-5-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-08-05
【实施或试行日期】:2002-08-05
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:粒径分析;组织;试验设备;缩微照相;试样制备;高级工业陶瓷;陶瓷;粒度;蒸馏物;试验;质量;仪器;显微摄影;特性;定义;结构;单片材料;测定;数学计算
【英文主题词】:
【摘要】:ThisEuropeanPrestandardspecifiesamanualmethodofmakingmeasurementsforthedeterminationofvolumefractionofmajorphasesinadvancedtechnicalceramicsusingmicrographsofpolishedandetchedsections,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.ThemethodinthisPrestandardisnotconsideredappropriatefornarrowglassyfilmsaroundgrains.Thismethodassumesthattheselectedregionsofapreparedcross-sectionarestatisticallyrepresentativeofthewholesampledsection.NOTE5Microstructuresareseldomhomogeneous,andthephasecontentscanvaryfrommicrographtomicrograph.Itisessentialtosurveyasufficientlywideareaofthepreparedsectiontoensurethatthoseareasselectedforevaluationarerepresentative,anddonotcontainingeye-catchingirregularities.SomeusersofthisPrestandardcanwishtoapplyautomaticorsemiautomaticimageanalysistomicrographsordirectlycapturedmicrostructuralimages.ThisiscurrentlyoutsidethescopeofthisPrestandard,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
【原文标准名称】:高技术陶瓷.整体陶瓷.一般的和表面结构特性.通过显微摄影图评估测定相体积分数
【标准号】:BSDDENV623-5-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-08-05
【实施或试行日期】:2002-08-05
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:粒径分析;组织;试验设备;缩微照相;试样制备;高级工业陶瓷;陶瓷;粒度;蒸馏物;试验;质量;仪器;显微摄影;特性;定义;结构;单片材料;测定;数学计算
【英文主题词】:
【摘要】:ThisEuropeanPrestandardspecifiesamanualmethodofmakingmeasurementsforthedeterminationofvolumefractionofmajorphasesinadvancedtechnicalceramicsusingmicrographsofpolishedandetchedsections,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.ThemethodinthisPrestandardisnotconsideredappropriatefornarrowglassyfilmsaroundgrains.Thismethodassumesthattheselectedregionsofapreparedcross-sectionarestatisticallyrepresentativeofthewholesampledsection.NOTE5Microstructuresareseldomhomogeneous,andthephasecontentscanvaryfrommicrographtomicrograph.Itisessentialtosurveyasufficientlywideareaofthepreparedsectiontoensurethatthoseareasselectedforevaluationarerepresentative,anddonotcontainingeye-catchingirregularities.SomeusersofthisPrestandardcanwishtoapplyautomaticorsemiautomaticimageanalysistomicrographsordirectlycapturedmicrostructuralimages.ThisiscurrentlyoutsidethescopeofthisPrestandard,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
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