JIS B8251-1981 铝合金制液化天燃气贮槽结构

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MIL-R-63997B (NOTICE 1), MILITARY SPECIFICATION: RIFLE, 5.56MM: M16A2 (20 FEB 1997) [S/S BY MIL-DTL-63997C]., This notice should be filed in front of MIL-R-63997B(AR) dated 12 December 1986MIL-R-63997B(AR) dated 12 December 1986 with Amendment 4, dated 31 July 1993 is inactivefor new design and no longer used except for replacement purposes.【英文标准名称】:Advancedtechnicalceramics-Monolithicceramics-Generalandtexturalproperties-Determinationofgrainsizeandsizedistribution(characterizedbythelinearinterceptmethod)
【原文标准名称】:高级工程陶瓷.单片陶瓷.一般和纹理特性.粒度和粒度分布的测定(线性截取法表征)
【标准号】:BSEN623-3-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-08-15
【实施或试行日期】:2001-08-15
【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】:陶瓷;粒度;粒度测量;特种陶瓷;粒度分布;均值;整体材料;显微摄影;平均
【英文主题词】:
【摘要】:ThispartofEN623describesmanualmethodsofmakingmeasurementsforthedeterminationofmeanlinearinterceptgrainsizeofadvancedtechnicalceramicsusingphotomicrographsofpolishedandetchedtestpieces.Thisisnotthetruemeangraindiameter,butasomewhatsmallerparameterrepresentingtheaveragepathlengthofalinedrawnacrossatwo-dimensionalsection.Therelationshiptotruegraindimensionsdependsongrainshapeanddegreeofmicrostructuralanisotropy.Thisstandardcontainstwomethods:AandB.MethodAappliestosingle-phaseceramics,andtoceramicswithaprincipalcrystallinephaseandaglassygrainboundaryphaseoflessthanabout5%byvolumeforwhichinterceptcountingsuffices.MethodBappliestoceramicswithmorethanabout5%byvolumeofporesorsecondaryphases,orceramicswithmorethanonemajorcrystallinephasewhereindividualinterceptlengthsaremeasured,whichcanoptionallybeusedtocreateasizedistribution.Thislattermethodallowstheporesorphasestobedistinguishedandthemeanlinearinterceptsizeforeachtobecalculatedseparately.NOTEAmethodofdeterminingvolumefraction(s)ofsecondaryphase(s)isunderdevelopmentasENV623-5;thiswillprovideameansofdeterminingwhetherMethodAorMethodBshouldbeappliedinborderlinecases.Someusersofthisstandardmaywishtoapplyautomaticorsemiautomaticimageanalysistomicrographsordirectlycapturedmicrostructuralimages.Thisispermittedbythisstandardprovidedthatthetechniqueemployedsimulatesthemanualmethod(seeclause4and8.4).
【中国标准分类号】:Q32
【国际标准分类号】:81_060_30
【页数】:26P;A4
【正文语种】:英语