简介：Weldabilityofpolyetheretherketone(PEEK)withpolyetherimide(PEI)istested.AndcarbonfiberreinforcedPEEKlaminatesareresistanceweldedusingstainlesssteelmeshheatingelement.Theeffectsoftheweldingtimeandweldingpressureonthelapshearstrengthofjointsareinvestigated.ResultsshowthatPEEKcanhealwithPEIwellinweldingconditionandthelapshearstrengthofPEEK/CF(carbonfibre)jointincreaseslinearlywithweldingtime,butreachesamaximumvaluewhenweldingpressurerangingfrom0.3MPato0.5MPawithconstantweldingtime.ThefracturecharacteristicsofsurfaceareanalyzedbySEMtechniques,andfourtypesoffracturemodesoflapshearjointsaresuggested.

简介：钡锶铝矽酸盐(BSAS)和Si/BSAS涂层经由一个二拍子的圆舞激光cladding过程在C/SiCcomposites的表面上被制作。微观结构，机械性质，和样品的水蒸汽腐蚀行为被调查。BSAS涂层被发现紧被结合到底层和仅仅一些毛孔，microcracks被观察。硅中间层的介绍被揭示减少热应力并且支持在激光cladding过程期间形成的缺点愈合。为了评估腐蚀抵抗，BSAS和Si/BSAS-coated，C/SiCcomposites暴露于50%H2在1250敢椠?慦桳潩的O和50%O2吗？

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简介：Objectives:Polymerizationshrinkageofdentalcompositesremainsamajorconcerninrestorativedentistrybecauseitcanleadtomicro-crackingofthetoothanddebondingatthetooth-restorationinterface.Theaimofthisstudywastomeasurethefull-fieldpolymerizationshrinkageofdentalcompositesusingtheopticaldigitalimagecorrelation(DIC)methodandtoevaluatehowthemeasurementisinfluencedbythefactorsinexperimentsetupandimageanalysis.Methods:Fourcommercialdentalcomposites,PremiseDentine,Z100,Z250andTetricEvoCeram,weretested.Compositewasfirstplacedintoaslotmouldtoformabarspecimenwithrectangular-sectionof4mmmm,followedbythesurfacepaintingtocreateirregularspeckles.Curingwasthenappliedatoneendofthespecimenwhiletheotherpartwerecoveredagainstcuringlightforsimulatingtheclinicalcuringconditionofcompositeindentalcavity.Thepaintedsurfacewasrecordedbyacharge-coupleddevice(CCD)camerabeforeandaftercuring.Subsequently,thevolumetricshrinkageofthespecimenwascalculatedwithspecialistDICsoftwarebasedonimagecrosscorrelation.Inaddition,afewfactorsthatmayinfluencethemeasuringaccuracy,includingthesubsetwindowsize,specklesize,illuminationlightandspecimenlength,werealsoevaluated.Results:ThevolumetricshrinkageofthespecimengenerallydecreaseswithincreasingdistancefromtheirradiatedsurfacewithaconspicuousexceptionbeingthecompositePremiseDentineasitsmaximumshrinkageoccurredatasubsurfacedistanceofabout1mminsteadoftheirradiatedsurface.Z100hadthegreatestmaximumshrinkagestrain,followedbyZ250,TetricEvoCeramandthenPremiseDentine.Largersubsetwindowsizemadetheshrinkagestraincontoursmoother.Butthecostwasthatsomedetailsintheheterogeneityofthematerialwerelost.Verysmallsubsetwindowsizeresultedinalotofnoiseinthedata,makingitdifficulttodiscernthegeneralpatterninthestraindistribution.Speckle

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简介：与直径40公里测试的裂口Hopkinson压力酒吧(SHPB)被用来与不同苍蝇灰内容调查设计似水泥的composites(ECC)的动态机械性质。包括变丑，精力吸收能力，紧张压力关系和失败模式的基本性质被讨论。ECC证明紧张率相关性和保留的更好的塑料与反应粉末水泥(RPC)和水泥相比流动在影响过程期间，但是批评压缩力量比RPC和水泥的低。PVA纤维的衔接的效果和苍蝇灰的增加能显著地改进ECC的变丑和精力吸收能力。随在ECC的苍蝇灰内容的增加，降低的静态、动态的压缩力量和动态增加因素提高了。因此，到会，不同工程需要，苍蝇灰的内容能是一个重要索引控制ECC的静态、动态的机械性质。

简介：AKondo-likeeffect,namely,theupturnofresistivityatlowtemperatures,isobservedinperovskitemanganitewhennonmagneticinsulatorsaredopedassecondaryphase.Inthispaper,thelow-temperatureresistivityupturneffecthasbeenarguedtooriginatefrominterfacialmagneticphasereconstruction.HeisenbergspinlatticeshavebeensimulatedusingtheMonteCarlomethodtorevealphasecompetitionaroundsecondaryphaseboundary,namely,manganite-insulatorboundarythatbehaveswithaweakantiferromagnetictendency.Moreover,theresistornetworkmodelbasedondouble-exchangeconductivemechanismreproducesthelow-temperatureresistivityupturneffect.Ourworkprovidesareasonablephysicalmechanismtounderstandthenoveltransportbehaviorsinmicrostructuresofcorrelatedelectronsystems.

简介：Multiwalled碳nanotubes(CNT)由用羰基的铝层是涂的有铝hexacarbonyl的一位先锋的热分解过程。瞬间涂的CNT(Mo-CNTs)被增加进铜粉末借助于火花血浆sintering跟随的机械milling制作Mo-CNT/Cucomposites。当他们的内容是2.5vol.%7.5vol.%时，Mo-CNTs是在Cu矩阵的一致分散，当一些Mo-CNT簇清楚地在混合在10.0vol.%15.0vol.%Mo-CNTs的增加被观察时。Mo-CNT/Cucomposites的机械、电、热的性质被描绘，并且结果证明张力的力量和坚硬分别地比CNT免费的标本的那些高2.0和2.2倍。而且，Mo-CNT/Cucomposites展出了提高的热传导性但是劣等的电的电导率与sintered相比纯Cu。uncoatedCNT/Cucomposites被类似的过程制作，并且CNT/Cucomposites的测量张力的力量，坚硬，热传导性，和电的电导率是比Mo-CNT/Cucomposites的那些低的。

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简介：Polyaniline(平底锅)敏化nanocrystallineTiO2composites(TiO2/PAn)成功地被准备并且为染料甲又蓝色(MB)的降级用作有效光催化剂。结果证明那个平底锅能高效地敏化TiO2，合成光催化剂能被两个都吸收紫外、可见的光激活(λ：190800nm)，而纯TiO2仅仅吸收了紫外光(λ<380nm)。在自然的光的照耀下面，MB能比在TiO2上在TiO2/PAncomposites上更高效地被降级。而且，它能被简单沉积容易与答案分开。

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简介：ThecreepbehaviorofAI2O3.SiO2fiberreinforcedZL109compositeshasbeeninvestigatedatfourtemperaturesrangingfrom553to623K.Theresultsshowhighstressexponentandhighapparentcreepactivationenergy.Agoodcorrelationbetweenthenormalizedcreeprateandnormalizedeffectivestressmeansthatthetruestressexponentofminimumcreepstrainrateofthecompositeisverycloseto5,andtheminimumcreepstrainrateismatrixlatticediffusioncontrolled.Thethresholdstressdecreaseswithincreasingtemperaturelinearlyanddisappearsatatemperaturecloseto623K.Itisassumedthatthelongrangeinternalbackstressesgeneratedincreepreducetheloadtransfertofibersandtheinteractionbetweendislocationsandstrengtheningprecipitatesdecreasesathightemperature.Atahightemperaturewherethelongrangeinternalbackstressesisveryclosetotheappliedstress,thethresholdstressdisappears.

简介：在situcomposites在艾尔矩阵上研究严重塑料变丑的影响规则，10?wt%艾尔3在situ的Zr/2024Al增强粒子合成被准备由直接融化反应(DMR)，然后，合成是由有90的一个方向的热伪造?%塑料变丑。然后，前进状态的微观结构合成被观察，并且机械性质的变化法律和磨擦表演在以后并且在塑料使变形前被比较。结果显示艾尔3增强Zr的粒子旋转并且闯入10-20的更小的尺寸?ng可溶的biopolymer有三个转变金属离子的牛的浆液白朊(BSA)(M，M=Cu，公司，Mn)。白朊一定的金属离子的有约束力的模式和比率被调查。BSA-M建筑群被紫外力的、圆形的二色性(CD)描绘系列和polyacrylamide胶化电气泳动(页)。当聚合物支架和金属建筑群作为催化活跃中心工作了，BSA服务了。当到BSA的转变金属离子建筑群的有约束力的比率是5:1时，结果证明BSA的结构仍然保持未改变。而且，清除superoxide阴离子自由的基(O\(_{2}^{\bullet-}\？？

简介：Al2O3/Al的三个系列把陶器的矩阵composites，命名矿泉，SPV和HP压成薄片，被不同方法制作。矿泉和SPV经由屏幕在空或真空中打印和随后的热处理用Al2O3片和艾尔泥浆被准备。HP样品被热压成为艾尔陪衬和Al2O3片的分层的栈。SEM和XRD被使用分析微观结构和夹层水晶阶段。弯曲力量，破裂坚韧和三个方法做的样品的破裂工作被测量并且比较。结果证明composites比Al2O3片有好一些的坚韧和更高的破裂工作。在三个方法做的样品之中，热压做的样品有最佳机械性能。排水量负担曲线和骨折机制被分析。

简介：Two-dimensional(2-D)BiVO4nanosheets-graphene(GR)compositeswithdifferentweightadditionratiosofGRhavebeenpreparedviaafacilewetchemistryprocess.X-raydiffraction(XRD),Ramanspectra,X-rayphotoelectronspectra(XPS),UV-visdiffusereflectancespectra(DRS),field-emissionscanningelectronmicroscopy(FE-SEM),transmissionelectronmicroscopy(TEM),nitrogenadsorption-desorption,transientphotocurrentresponseandphotoluminescence(PL)spectrawereemployedtodeterminethepropertiesofthesamples.ItisfoundthatBiVO4nanosheetscouldpavewellonthesurfaceofgraphenesheets.BiVO4nanosheets-GRcompositeswithaproperadditionamountofGRexhibitedhigherphotocatalyticactivitythanbareBiVO4nanosheetstowardliquid-phasedegradationofrhodamineB(RhB)andmethylorange(MO)undervisiblelightirradiation.TheenhancementofphotocatalyticactivitiesofBiVO4nanosheets-GRcompositescanbeattributedtotheeffectiveseparationofphotoexcitedelectron-holepairs.Thisworknotonlyprovidesasimplestrategyforfabricatingspecific2-Dsemiconductor-2-DGRcomposites,butalsoopensanewwindowofsuch2-Dsemiconductor-2-DGRcompositesasvisiblelightphotocatalyststowardanimprovedvisiblelightphotoactivityinpurifyingpollutedwaterresources.

简介：Flyashfloatingbead(FAFB)wasmodifiedbythenonionicsurfactantpolyethyleneglycol(PEG)undervariousconcentrationstoimproveitshydrophobility,andthenPEGmodifiedFAFBcompositedwithpolyaniline(FAFB-PEG/PAn)byemulsionpolymerizationmethodusingdifferentfeedratiosofFAFBPEG.Thechemicalstructure,phasestructure,microstructure,conductivity,anddielectricpropertieswerestudiedbyFT-IR,XRD,SEM,four-probetechnique,andLCRdigitalbridge,respectively.ItwasdemonstratedthattheoptimalconcentrationofPEGwas1mol/Landthecorrespondinggraftingratiowas1.42%.ThephasestructureofFAFBwasnotdestroyedaftermodificationbyPEG,whilethesurfacebecamesmootherandcouldbecoatedbyPAnsuccessfullyaccordingtoSEMtechnique.ComparedtothatofdodecylbenzenesulfonicaciddopedPAn(PAn-DBSA),theconductivityofFAFB-PEG/PAnwasdecreasedby10-100timesafterintroductionofvariousamountsofFAFB-PEG,especiallythevaluecouldbedecreasedto0.01Scm~(-1)if50wt%ofFAFBPEGwasprovided.Additionally,thedielectricconstantandlossfactorofFAFB-PEG/PAncompositesgraduallydecreasedwithincreasingamountofFAFB-PEGinthefrequencyrangeof100KHz-2MHz,namely,thedielectricconstantcouldbestillkeptat500andcorrespondinglythelossfactordecreasedto4.7at100KHzif50wt%ofFAFB-PEGwasprovided.TheleakingcurrentphenomenonderivedfromPAn-DBSAcouldalsobeweakenedbyFAFB-PEG.

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简介：Inthepresentstudy,amodifiedHall-Petchcorrelationonthebasisofdislocationpile-upmodelwasusedtoestimatetheyieldstrengthofSiCp/Alcomposites.TheexperimentalresultsshowthatthemodifiedHall-Petchcorrelationexpressedasσcy=244+371λ-1/2fitsverywellwiththeexperimentaldata,whichindicatedthatthestrengthincreaseofSiCp/Alcompositesmightbeduetothedirectblockingofdislocationmotionbytheparticulate-matrixinterface,namely,thedislocationpile-upisthemostpossiblestrengtheningmechanismforSiCp/Alcomposites.

简介：ThisworkstudiedthecharacteristicsofSiO2distributionandstructureofsilicatephasesinMgO-ZrO2compositessynthesizedbyrawmaterialsoflightfiredmagnesitendzircon,Theresultsindicatethat30wt%-40wt%SiO2contentinthesystemisexistedintheformofcrystallineofforsterite(M2S),theremainderingofSiOcontent(60wt%0-70wt%)isexistedintheglassphase,Thechemicalcompositionofglassphaseiswellagreedwiththechemicalcompositionofmonticellite(CMS).