简介:Fluoropolymeranddifferentkindsofsilicaparticleswereusedforcontrollingsurfacechemistryandmorphology,respectively.Asuperhydrophobicsurfaceoriginatedfromstrawberry-likeorquincunx-shapedcompositesilicaparticleswasobtained.Thedualsizeparticlesareobtainedbyutilizingthegraftofdifferentmodifiedsilicaparticleswithepoxyfunctionalgroupandaminefunctionalgroup.Thismakesthesurfaceoffilmformacompositeinterfacetohaveirregularbinarystructurewhichplaysanessentialroleintrappingairbetweenthesubstratesurfaceandtheliquiddropletstobenecessaryforhighcontactangleandlowcontactanglehysteresis.Themaximumcontactangleforwateronthehybridfilmisabout174±2°andthecontactanglehysteresisislessthan2°.Thesurfacemorphologies,roughnessandthewettabilityonthesurfaceoffilmscontainingdifferentstructuralsilicaparticleswerecompared.Itwasshownthatthehierarchicalirregularlystructurewithalowroughnessfactorandhighair-trappedratioisindispensableforsuperhydrophobicsurface.Althoughthisstructuralsurfacesbasedoncompositesilicaparticlesplayavitalroleingoverningthesurfacewettability,itisnecessarytocombinewithalowsurfaceenergytomakethesurfacesuperhydrophobic.
简介:Thisresearchfocusedonusingthewasterubberpowderasakindofregenerateresourcestoimprovethemechanicalpropertiesofcementmortar.ThetwokindsofhybridmodifiedrubberpowderTRPandATRPwerepreparedbysol-gelmethodandthenusedincementmortar.Thestructuresandpropertiesofthemwerestudied.ItisshownthatthenanoSi-O-SinetworkisgeneratedinTRPandATRPnetworksandthehydrophilicgroupisgraftedonthesurfaceofATRP.Themechanicalpropertiesofrubber-treatedmortar(RTM)weretestedandthemicrostructuresofthemwerealsostudied.Comparedtothemortarswithunmodifiedrubberpowders(RP),NaOHtreatedrubberpowder(SRP)andcouplingagenttreatedrubberpowder(CRP),theRTMwithATRPhasthehighestcompressivestrengthandflexuralstrength.Thestress-straincurvesshownthatthepeakofstressofRTMwithATRPisincreasedandindicatedthehighercompressiondeformationandtoughness.ItisfoundthattheinterfacialadhesionbetweentheATRPandcementmortarisincreaseddistinctlybySEM,whichresultsinenhancedductilityandmechanicalpropertiesofRTMwithATRP.
简介:Ahigh-carbonsteeljoint,SK5(0.84wt%C),wassuccessfullyweldedbyfrictionstirwelding(FSW),bothwithoutandwithagastorch,inordertocontrolthecoolingrateduringwelding.Afterwelding,theweldzonecomprisedgrayandblackregions,correspondingtomicrostructuralvariation:amartensitestructureandaduplexstructureofferriteandcementite,respectively.ThevolumefractionofthemartensitestructureandtheVickershardnessintheweldsweredecreasedwiththeusingofthegastorch,whichwasrelatedwiththelowercoolingrate.
简介:ThehybridsourcethatcombinedCO2laserwithTIGarctoproceedweldingwasanalyzed.Basedonanenergymodel,thetemperaturefieldandweldshapewerecalculatednumerically.Theheattransfercharacteristicofthehybridheatsourcetoworkpieceanditseffecttoweldshapewerealsoanalyzed.Throughanalyzingtheenhancementeffectofthehybridheatsource,theabsorptioneffectanddefocusingeffectofthehybridarctolaserwerecalculated,andtheregularityoftheenergydensitytothecurrentwasobtainedsubsequently.Atlast,thecriticalenergymatchestoinducetheenhancementeffectofCO2laser-TIGarchybridweldingwereobtained.
简介:Duetotheminiaturizationofmoderndevicesre-quirecomponentswithlightweight,highintegra-tionandtheabilitytostoreenergyinassmallvol-umeaspossible.Asaresult,energystoragedensitybecomesanimportantfigureofmeritforenergystor-agedevices.Inthispaper,firstly,wediscussedtheenergydensityinfine-grainedleadzirconatetita-nateglass-ceramicscompositewiththehelpofthe
简介:由地可配置的nanogranularSiO2的基于的离子/电子的混合synaptic晶体管gated拍摄的indium–zinc-oxide(IZO)被报导。设备展出了上面的高当前的开/关比率107,∼14cm2V−1s−1和∼80mV/decade的一个低次于最低限度的秋千。门偏爱将在隧道/电介质接口调制在质子和电子之间的相互影响。由于在nanogranularSiO2电影以内的短暂质子流动的动态调整,隧道电流将动态地被修改。短期的synaptic粘性例如短期的potentiation和短期的消沉,在建议IZOsynaptic晶体管上被模仿。结果显示这里建议的synaptic晶体管在未来neuromorphic设备有潜在的应用。
简介:为全面分析高模量沥青及混合料的疲劳性能,对两种高模量添加剂不同掺量下(添加剂分别为ZQ-2及ECB,掺量分别为占沥青质量5%、7%、10%)的高模量沥青进行动态剪切流变试验,研究其疲劳因子随掺量的变化规律;同时,对高模量沥青混合料进行四点疲劳梁试验,分析其疲劳寿命的规律,并与基质沥青混合料对比。试验结果表明,掺加ZQ2的高模量沥青疲劳因子随掺量提高有明显的上升趋势,即疲劳性能随掺量变大而下降;而掺加ECB的高模量沥青疲劳因子随掺量提高变化规律不明显,掺量为10%时疲劳性能最佳。此外,两种高模量沥青混合料疲劳性能随掺量提高呈现不同的变化趋势,但都优于基质沥青混合料的疲劳性能。