简介:相片折射的效果的一个理论处理和在液晶的nematic的联系非线性的光过程的试验性的确认被介绍。效果被归因于可以来自光电游离杂质的相片费用导致的dc空格费用域。现象被分析,在nematic液晶的相片折射度的一个理论模型被开发。新试验性的结果被发现在对理论的好同意。(编辑作者摘要)5个裁判员。
简介:ThedensityofNi-Alalloysinbothliquidstateandsolid-liquidcoexistencestatewasmeasuredwithamodifiedpycnometricmethod.ItwasfoundthatthedensityofNI-AlalloysdecreaseswithincreasingtemperatureandAlconcentrationinthealloys.ThemolarvolumeofliquidNi-AlbinaryalloysincreaseswiththeincreaseoftemperatureandAlconcentration.ThepartialmolarvolumeofAlinNI-Albinaryalloywascalculatedapproximately.ThemolarvolumeofliquidNI-Alalloydeterminedinthepresentworkshowsanegativedeviationfromtheideallinearmolarvolume.
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简介:Thebondingofsteelplatetoaluminumliquidwasconductedusingrapidsolidification.Theinfluenceofdiffusiontimeoninterfacialstructurewasstudied.Theresultsshowedthatundertheconditionof750℃forthetemperatureofaluminumliquidand200℃forthepreheattemperatureofsteelplate,whendiffusiontimewasshorterthan4.3s,therewasonlyFe-Alsolidsolutionattheinterface.Whendiffusiontimewaslongerthan4.3s,Fe-Alcompoundbegantoformattheinterface.TherelationshipsbetweendiffusiontimetandthicknessofFe-AlcompoundlayerHareH=-9.72+2.62t-0.08t^2(4.3s≤t≤15s)andH=2.79+0.647t=0.033t^2(t>15s).
简介:Liquidcompositemoulding(LCM)processesareusedtomanufacturehighqualityandcomplex-shapedcompositepartsintheautomotive,marine,aerospaceandcivilindustries.On-linesensingplaysanimportantroleincontrollingthequalityofthefinalproductintheLCMmanufacturingenvironment.Thelong-periodfibergrating(LPG)technology,anewreal-timefiberopticsensorsystem,wasdevelopedtomonitortheflowfrontprogression.Thesensoroperationandcharacterizationundervariousprocessconditionswerediscussedindetail.TheexperimentalresultsshowedthatLPGsensorswererobustandreliabletodetectthearrivalofresinatpre-selectedlocationsinstructureswithlow-mediumfibervolumefraction;howeverwerelimitedatdifferentdepthsinstructureswithhighfibervolumefraction.
简介:AresearchonkineticsofAlevaporationfromliquidU—Alalloyswasmadeinavacuuminductionmelting(VIM)furnaceat1673—1843K.TheevaporationrateofAlwasfoundtobefirstorderwithrespecttoAlcontentinthemelt.TheoverallmasstransfercoefficientofAlwasdeterminedanditwasfoundthattheevaporationrateofAlincreasedwithincreasingtemperatures.TheapparentactivationenergyofAlevaporationat1673-1843Kwas171.5kJmol-1.ThevalueofmasstransfercoefficientofAlintheliquidphasewasestimatedtobe3.77×10-6,7.41×10-6,and9.40×10-6ms-1at1673,1753,and1843K,respectively.Meanwhile,ratedeterminingstepswerediscussedanditwasconcludedthattheevaporationrateofAlismainlycontrolledbyliquidphasemasstransfer.
简介:Theliquidphasebehaviorofthefine-grained5083Alalloyobtainedthroughthermomechanicalprocesswasinvestigatedduringthetensiletestsinatemperaturerangeof380-570-Candstrainraterangeof4.17×10-4-1.0×10-2s-1.Themaximumelongation530%ofthefine-grained5083Alalloywasobtainedat550-Cand4.17×10-4s-1.Fractureanalysisbyscanningelectronmicroscopy(SEM)indicatedthattheformationoffilament(formedbyliquidphase)wasgreatlyaffectedbythetensiletemperatureandstrainrate.Theresultsalsoshowedthattheoptimummorphologyofformedfilamentwasobtainedat550-Candastrainrateof4.17×10-4s-1.Theeffectofliquidphaseonsuperplasticdeformationofthealloywasfurtherdiscussed.
简介:HighperformanceliquidchromatographywithaC18reverse-phasecolumnwasusedtoseparatethefivecomponentsincoughsyrup,includingacetaminophen,p-aminophenol,caffeine,chlorphenaminemaleateandguaifenesin.Themobilephaseconsistsof15wi%acetonitrile,0.004mol/Lsodiumheptylsulfonate,0.03mole/Lpotassiumdi-hydrogenphosphateandtriethylamine(volumeratio13:40:44:3),thepHofwhichisadjustedto3.0byphosphoricacid.Thecontentsofthefivecomponentsareanalyzedonanultravioletspectropho-tometerat254nm,withaflowrateof0.4mL/min.Theresultsshowthatthecalibrationcurvesarelinearinacertainrange.Theaveragerecoveryoffivecomponentsisbetween96.31%and102.3%.
简介:SiCp/AI金属矩阵的表面上的紧缩的氧化物合成(SiCp/AIMMC)极大地取决于关节的性质。镶嵌的劈啪作响的目标被使用由血浆侵蚀在SiCp/AIMMC的结合的表面上完全蚀刻氧化物。在厚度的5妈妈的Cu/Ni/Cu电影被磁控管劈啪作响方法在一样的真空房间在干净结合表面上准备,它在结合的短暂液相(TLP)作为夹层被扮演过程。与单个Cu陪衬和Ni陪衬夹层的一样的厚度相比,200MPa的shear力量在TLP结合期间用Cu/Ni/Cu电影夹层被获得,它是89.7%碱金属的。另外,结合的区域的