ASTM C 138-1992 混凝土的单位重量分析、屈服点及空气含量测定(重量计算)的试验方法
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【英文标准名称】:TestMethodforUnitWeight,YieldandAirContent(Gravimetric)ofConcrete
【原文标准名称】:混凝土的单位重量分析、屈服点及空气含量测定(重量计算)的试验方法
【标准号】:ASTMC138-1992
【标准状态】:作废
【国别】:美国
【发布日期】:1992
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:施工材料;单位重量;含量测定;空气含量;重量分析;屈服强度;建筑;混凝土;试验
【英文主题词】:yieldstrength;testing;aircontent;construction;constructionmaterials;determinationofcontent;gravimetricanalysis;concretes;unitweight
【摘要】:
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:3P;A4
【正文语种】:英语
【英文标准名称】:Opticalamplifiers—Testmethods—Part3:Noisefigureparameters
【原文标准名称】:光学放大器.试验方法.噪音指数参数
【标准号】:BSEN61290-3-2008
【标准状态】:现行
【国别】:英国
【发布日期】:2009-03-31
【实施或试行日期】:2009-03-31
【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】:放大器;基本规范;电气工程;纤维光学;干涉;干扰;测量技术;噪声因数;噪音系数;噪声测量;乱真信号;光学纤维;光波导;光学;规范;测试
【英文主题词】:Amplifiers;Basicspecification;Electricalengineering;Fibreoptics;Interference(wavephysics);Measuringtechniques;Noisefactors;Noisefigure;Noisemeasurements;Noise(spurioussignals);Opticalfibres;Opticalwaveguides;Optics;Specification;Testing
【摘要】:ThisInternationalStandardappliestoallcommerciallyavailableopticalamplifiers(OAs),includingOAsusingopticallypumpedfibres(OFAsbasedoneitherrare-earthdopedfibresorontheRamaneffect),semiconductoropticalamplifiers(SOAs)andplanarwaveguideopticalamplifiers(PWOAs).
【中国标准分类号】:M33
【国际标准分类号】:33_180_30
【页数】:16P.;A4
【正文语种】:英语
【英文标准名称】:StandardSpecificationforAutocatalytic(Electroless)Nickel-PhosphorusCoatingsonMetal
【原文标准名称】:金属表面自催化(无电)镍磷涂层的标准规范
【标准号】:ASTMB733-2004(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:B08.08.01
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:autocatalytic;chemicalnickel;coatings;conductive;corrosionresistance;electroless;functional;nickel;nickelphosphorus;wearresistance;Autocatalyticcoatings--specifications;Electrolesscoatings;Engineeredelectrodepositedcoatings--s
【摘要】:1.1Thisspecificationcoversrequirementsforautocatalytic(electroless)nickel-phosphoruscoatingsappliedfromaqueoussolutionstometallicproductsforengineering(functional)uses.1.2Thecoatingsarealloysofnickelandphosphorusproducedbyautocatalyticchemicalreductionwithhypophosphite.Becausethedepositednickelalloyisacatalystforthereaction,theprocessisself-sustaining.Thechemicalandphysicalpropertiesofthedepositvaryprimarilywithitsphosphoruscontentandsubsequentheattreatment.Thechemicalmakeupoftheplatingsolutionandtheuseofthesolutioncanaffecttheporosityandcorrosionresistanceofthedeposit.Formoredetails,seeASTMSTP265(1)andRefs(2)(3)(4)and(5).1.3Thecoatingsaregenerallydepositedfromacidicsolutionsoperatingatelevatedtemperatures.1.4Theprocessproducescoatingsofuniformthicknessonirregularlyshapedparts,providedtheplatingsolutioncirculatesfreelyovertheirsurfaces.1.5Thecoatingshavemultifunctionalproperties,suchashardness,heathardenability,abrasion,wearandcorrosionresistance,magnetics,electricalconductivityprovidediffusionbarrier,andsolderability.Theyarealsousedforthesalvageofwornormismachinedparts.1.6Thelowphosphorus(2to4%P)coatingsaremicrocrystallineandpossesshighas-platedhardness(620to750HK100).Thesecoatingsareusedinapplicationsrequiringabrasionandwearresistance.1.7Lowerphosphorusdepositsintherangebetween1and3%phosphorusarealsomicrocrystalline.Thesecoatingsareusedinelectronicapplicationsprovidingsolderability,bondability,increasedelectricalconductivity,andresistancetostrongalkalisolutions.1.8Themediumphosphorouscoatings(5to9%P)aremostwidelyusedtomeetthegeneralpurposerequirementsofwearandcorrosionresistance.1.9Thehighphosphorous(morethan10%P)coatingshavesuperiorsalt-sprayandacidresistanceinawiderangeofapplications.Theyareusedonberylliumandtitaniumpartsforlowstressproperties.Coatingswithphosphoruscontentsgreaterthan11.2%Parenotconsideredtobeferromagnetic.1.10ThevaluesstatedinSIunitsaretoberegardedasstandard.1.11Thefollowingprecautionarystatementpertainsonlytothetestmethodportion,Section9,ofthisspecification.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.X1.1.1Thistestmethodwillevaluatetheresistanceofthecoatingtoabrasivewear.Thetestisperformedbyrotatingaplatedpanelunderrotatingrubberwheelsandweighingthepanelaftereach1000cyclesforweightloss.Durationofthetestis6000cyclesanditcanbeextendedto25000cyclesformorecompleteresults.NoteX1.18212;VariationinresultshavebeenattributedtothehumidityinthelaboratoryandthestorageconditionsoftheCS-10wheels.Careshouldbetakentocontrolthehumiditybetweentests.X1.1.2Theresultsarevariablebetweentestsandthereforethreeplatedtestspecimensshouldbetestedto6000cycleseach.Theresultsshouldbeaveragedwithoutthefirst1000cyclesandtheabrasionwearresistanceisreportedastheweightlossinmg/1000cycles(TaberWearIndex).
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:14P.;A4
【正文语种】:英语
