简介：Lithium/polypyrrole(Li/PPy)电池作为阴极用锂表被制作，是的PPy阳极，多微孔的膜聚丙烯/聚乙烯/聚丙烯(PP/PE/PP)象电解质象隔板和LiPF6/ethylenecarbonate-dimethyl碳酸盐甲基乙醇碳酸盐(EC-DMC-EMC)合成。Polypyrrole被化学聚合准备。某些基本电气化学的表演被调查。电池的性质被SEM，galvanostatic控告/解除测试，周期的voltammetry(CV)，和a.c阻抗光谱学描绘并且测试。电池的表演上的PPy阳极，塑造寒冷的压力，和电流的隔板，形态学，和电导率的影响被学习。把PP/PE/PP膜用作隔板，电池显示出好存储稳定性和骑车的性质。材料而非形态学的传导性影响了电池的行为。越高传导性，越更好表演房间。阳极小团的20MPa将使好的房间和适合的控告/解除电流的性质成为的合适的塑造寒冷的压力是0.1妈。房间与97%100%coulombic效率显示出优秀性能。95.2mAh/g的最高的分泌物能力被获得。

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简介：ProblemsaboutsurfacemountingprocessforfinepitchdevicesandreasonsonsolderbridgingofLtypeleaddevicesweldedaredepicted.Bridgingmechanismandinfluencefactorsareanalyzedwithtwo-dimensionalgeometricmodel.Basedonthis,high-densitysurfacemounttechnology(SMT)forfinepitchLtypeleaddevicesheatedbyscan-ninglaserisraised.SurfacemountprocessforQFP208onprintedcircuitboard(PCB)isstudied.Theresultsoftestsarethatitisquitepossibletosolvethesolderbridgingofsurfacemountingforpitchdeviceswithscanninglaser-heat-ingmethod.

简介：Thisstudydevelopedasequentialcouplingfiniteelementproceduretopredictresidualstressesofsteelpipeswithlongitudinalwela\circumferentialweldandspiralweld.Theresultsshowthattheresidualstressinheataffectedzone(HAZ)ishigherthanthatinweldforspiralweldpipe.Forthecircumferentialweldpipeandspiralweldpipe,theresidualstressininnersurfaceishigherthanthatinoutersurface.However,forthespiralweldpipe,theresidualstressininnersurfaceissmallerthanthatinoutersurface.Thehoopresidualstressofcircumferentialweldpipeishigherthanthatoflongitudinalweldpipe,whiletheaxialresidualstressofcircumferentialweldpipeissmallerthanthatoflongitudinalweldpipe.Thehoopstressesforcircumferentialweldpipeandaxialstressforlongitudinalweldpipehaveexceededtheyieldstrengthofbasemetal.Withtheincreaseofhelixangle,thehoopstressdecreaseswhiletheaxialstressincreases.Forthespiralpipe(α=30°to50°),boththehoopstressandaxialstressarerelativelysmall.Thespiralpipe(helixanglerangingfrom30°to50°)ishelpfultoreducestresscorrosioncracking(SCC)anditisrecommendedtomanufacturethesteelpipe.

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简介：基于密度，功能的理论(DFT)和投影机扩充了的精力充沛的计算挥动的Abinitio为决定lanthanidesesquioxidesLn_2O_3的多型性的方法(爪)(在哪儿行=稀土元素的元素，Y，和Sc)，LnMO_3perovskites(在哪儿M=AlandGa)，并且Ln_2B_2O_7pyrochlores(在哪儿B=Ti，Zr，和Hf)被报导。除了theC类型Ln_2O_3，相对latticest能力与立方的结构，计算全部的精力为是更加更否定的与非常估计的结果或试验性的结果同意了很好。随Ln~(3+)阳离子半径的增加，多态的结构显示出果汁饮料生产趋势。第三的氧化物陶艺的形成的热含量的趋势和数量从他们相当适合于的成分二进制代码氧化物综合了可得到的试验性的结果，和珍贵热力学的性质被负担得起到化合物，没有试验性的数据为是可得到的。两perovskitesandpyrochlores的形成的热含量趋于随Ln~(3+)阳离子半径的增加变得更否定。

简介：Thechloridizingsegregationandmagneticseparationoflow-gradenickellateritesfromYunnanprovinceofChinawasinvestigated.Thenickellateriteswerecharacterizedbymicroscopicinvestigations,usingX-raydiffractometry(XRD)andenergydispersivespectrometry(EDS)techniques.Thepellets,whichwerepreparedwithmagnesiumchlorideandcokeaschlorideagentandreductantrespectively,wereheatedtoahightemperature,andthepelletsaftercoolingwerecrushedformagneticseparation.Aseriesofexperimentswereconductedtoexaminetheeffectofchlorinatingagentdosage,reductantdosage,chloridizingtemperatureandchloridizingtimeonenrichmentgradeofNiandCo.TheresultsindicatethatthefourfactorshavesignificanteffectsontheextractionsofNiandCo.Theoptimumconditionsareasfollows:theamountsofmagnesiumchlorideandcokeare6%and2%,respectively,chloridizingtemperatureis1253K,andchloridizingtimeis90min.Undertheconditions,extractionsofNiandCoreach91.5%and82.3%,respectively.

简介：ThisinvestigationwasperformedtostudyacousticfieldsignalinordertoimproveRSWquality.Researchersfirstlybuiltanacousticarraysensorsystem,whichincluded8MPA-416acousticsensors,dataacquisitioncardandLabVIEW.Thesystemobtainedtheacousticfieldinformationintheprocessofnuggetgrowing.Duetothenonlinearityfieldsignal,arraysensoralgorithmwasutilizedtoquantitativelyanalyzethecharacteristicsofacousticfieldandreducednoise.TheexperimentandcalculationresultsshowthatarraysensorsystemcanacquireacousticfieldsignalofnuggetgrowingintheRSWprocessandarrayprocessingalgorithmbasedonacousticfieldcanextractcharacteristicparameterstoevaluateRSWquality.ItwasconcludedthattheacousticarraysensorsystemoffersanewmethodologyforRSWqualityinspection.

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简介：Widegapbrazing(WGB)experimentsusingthebuttedspecimenwitha1.5mmgapwerecarriedoutfortherepairofthefailedK418Bsuperalloylow-pressureturbinevanes.Thehightemperaturecreeprupturestrengthsofthebrazedjointsweretested,andthemicrostructuresandfracturesurfacesofthejointswereobserved.TheresultsshowthatthemicrostructureofK418Balloyjointiscomposedofdenseequiaxedgrain,smallanddiscretecompoundswithafewmicro-pores.Duringthecreeprupturetest,thecracksinitiatepreferentiallyatthemicro-poreorthegrainboundary,thenpropagatealongthegrainboundarytillthefracturehappens.Thecreeprupturestrengthat700℃ofthebrazedjointswith50%brazemetalintheworkingpartcouldexceed90%thatoftheK418Bsuperalloy,andthejointswith100%brazemetalintheworkingpartachieve70%to80%ofthecreeprupturestrengthsfortheK418Bbasemetal.

简介：ESD(electrosparkdeposition)isapromisingprocesstoproducehardandwear-resistingcoatingsonmetallicsubstrates.InthispapermicrostructureandinterfacialcharacteristicsoftheWC92-Co8coatedontitaniumandcarbonsteelarepresented.Ametallurgicalbondingbetweenthecoatingandsubstrateisobtained.TheTielementwasfoundtodistributeinWC92-Co8atthemetalpool,aswellastheinterfacebydiffusion.SomenewphaseswereproducedinthecoatinglayerduetothechemicalreactionduringtheESDprocess.ExperimentalobservationandthermodynamicanalysiswereutilizedtostudythemechanismofESD.

简介：Thehigh-speedcamerasystemanddataacquisitionsystemofweldingparameterswerecreatedintandemMIGweldingofhighstrengthaluminumalloy.Theexperimentswerecarriedoutinordertoobtainthephotosofdroplettransferunderdifferentweldingparametersinpulsedmode.Thedroplettransfermodeof"onepulseonedroplet"becomesthepreferredselectionduringweldingprocessbecauseofitsstableprocedureandsoundweldform.Theparameterrangesforcorrespondingtransfermodewereexperimentallyachieved,amongwhichthestabledroplettransfermodeof"onepulseonedroplet"canberealized.Theseeffortsbravethewayforcontrolweldheatinputandweldformationinthefuture.

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简介：ThispaperpresentsanintegratedsimulationmodelforfulldigitalcontrolledPMIG/MAGweldingsystemwithMatlab/Simulink,anditconsistsofpowerinverter,digitalcontrolsystemanddynamicarc-loadmodel.AnintegratedsimulationstudywasdoneforfulldigitalPMIG/MAGwelding,andamethodofconnectingdynamicarc-loadmodeltothesystemwithcontrolledcurrentsourcewaspresented,inaddition,thesimulationresultswereutilizedtostudytheissuesofdigitalcontrolPMIG/MAGweldinginthispaper.Theexperimentalresultsvalidatedthedevelopedsimulationmodel,andthissimulationstudycanbeappliedinimplementationofthefulldigitalPMIG/MAGweldingandanalysisofsystemdynamicprocess.