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简介：在这研究，空隙免费(如果)钢盘子受到双sided磨擦促使处理(FSP)。有大约12的一种平均谷物尺寸的有细密纹理的结构?m与大约2.5的厚度在处理地区(PZ)被获得?公里。收益力量(325?MPa)并且最终的张力的力量(451?MPa)FSP如果钢比基础材料(BM)的那些显著地高(192和314?MPa)，当延伸(67.5%)几乎与BM(66.2%)相比仍然保持未改变时。PZ的平均microhardness价值是大约130?HV，比BM的高1.3倍。另外，FSP如果钢比BM显示出一个更积极的腐蚀潜力和更低的腐蚀水流密度，展出更低的腐蚀趋势和腐蚀评价在一3.5?wt%NaCl答案。而且，FSP如果钢在空和NaCl答案中两个都比BM展出了更高的疲劳生活。如果钢主要与疲劳有条纹或刻痕之状态展出了典型transgranular破裂，腐蚀疲劳骨折FSP出现，当BM主要介绍了intergranular破裂时。提高的腐蚀疲劳性能主要被归因于成核的增加的电阻和疲劳裂缝的生长。腐蚀疲劳机制被阳极的溶解首先在周期的应力和腐蚀剂答案的联合效果下面控制。

简介：Themicrostructureofthelasermelted1.0%Ctoolsteelhavebeeninvestigated.Theregionaffectedbythelasercanbesubdividedinto3zones,whichconsistofameltedregionatthesurface,azonewithsolidstatetransformationandtheareaadjacenttotheunaffectedsubstratewherecementiteisslightlydissolved.Themeltedzonepossessedacellulargrowthmorphologyconsistingofausteniteandmartensite.Thecarboncontentoftheaustenitewasmeasuredtobeover1wt-%.Agreatdealofretainedausteniteandtwinnedmartensitewerefoundinthefirsttwozones(themeltedandsolidtransformed).

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简介：RapidsolidificationofCu-Pbmonotecticalloyshasbeenaccomplishedduringfreefallina3mdroptube.BothmacrosegregatedanduniformlydispersedstructuresareobservedinCu-40wtpctPballoydroplets,whereasdropletsofcompositionCu-64wtpctPbexhibitonlymacrosegregationmorphologies.Themicrostructuresarestronglydependentondropletsize.Thehigherundercoolingtendstofacilitateliquidphaseseparationandresultsinmoreextensivemacrosegregationinsmallerdroplets.ThereexistsapronouncedtendencyforthePb-richliquidtooccupythesurfaceofthedropletsofbothcompositions,resultingfromthequitelowersurfacetensionofthePb-richphaseandcausingaPb-richlayeratthesurfaceofthesolidifieddroplet.ThenucleationofmonotecticcellsintheCu-40wtpctPbdropletswithdispersedstructurespreferentiallyoccursatthedropletsurface.Asinglenucleationeventtakesplacemorefrequentlyasdropletsizeisreduced.

简介：Thenear-infrared(NIR)diffusereflectancespectroscopywasusedtostudythecontentofBerberineintheprocessedCoptis.TheallocatedproportionsofCoptistoginger,yellowliquororEvodiarutaecarpachangedaccordingtotheresultsoforthogonaldesignaswellasthetemperature.Foraswithdrawingthefullandeffectiveinformationfromthespectraldataaspossible,thespectraldatawaspreprocessedthroughfirstderivativeandmultiplicativescattercorrection(MSC)accordingtotheoptimizationresultsofdifferentpreprocessingmethods.Firstly,themodelwasestablishedbypartialleastsquares(PLS);thecoefficientofdetermination(R2)ofthepredictionwas0.839,therootmeansquarederrorofprediction(RMSEP)was0.1422,andthemeanrelativeerror(RME)was0.0276.Secondly,forreducingthedimensionandremovingnoise,thespectralvariableswerehighlyeffectivelycompressedviathewavelettransformation(WT)technologyandtheHaarwaveletwasselectedtodecomposethespectralsignals.AfterthewaveletcoefficientsfromWTwereinputintotheartificialneuralnetwork(ANN)insteadofthespectrasignal,thequantitativeanalysismodelofBerberineinprocessedCoptiswasestablished.TheR2ofthemodelwas0.9153,theRMSEPwas0.0444,andtheRMEwas0.0091.Thevaluesofappraisalindex,namelyR2,RMSECV,andRME,indicatethatthegeneralizationabilityandpredictionprecisionofANNaresuperiortothoseofPLS.TheoverallresultsshowthatNIRspectroscopycombinedwithANNcanbeefficientlyutilizedfortherapidandaccurateanalysisofroutinechemicalcompositionsinCoptis.Accordingly,theresultcanprovidetechnicalsupportforthefurtheranalysisofBerberineandothercomponentsinprocessedCoptis.Simultaneously,theresearchcanalsoofferthefoundationofquantitativeanalysisofotherNIRapplication.

简介：Constrainedgroovepressing(CGP)isanewsevereplasticdeformationmethodsuitableforproducingultra-finegrainedsheetmetals.Inthiswork,theprocessingefficiencyforamuti-passCGPofpurecopperwasinvestigated.Witharelativelysmallgroovewidthof2mmandtightconstraint,asharpvariationofmechanicalpropertieswithpassnumberisobserved.Subgrainswiththesizeof*0.5lmhavedistinctboundaries,whichisthepredominantfeatureinthemicrostructureafterthreepasses.Theevolutionofdeformationhomogeneitycharacterizedbymicro-hardnessdistributionwasexaminedindetail.Observationsofopticalmicrographsandfracturesurfacemorphologyconfirmtheevolutionrule.Therelationbetweenelectricalresistivityandaccumulativeplasticstrainwasdiscussed.Crystallinedefects,micro-cracks,andmicrostructureuniformitytogetherdeterminethechangeofelectricalresistivityofCGPcopper.

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简介：相等的隧道(ECAP)处理的尖紧迫和常规挤出(前)被用于Mg-12Gd-3Y-0.5Zr(wt%)镁合金以便在机械性质评估潜在的改进。ECAP实验在380污瀠潲散被进行吗？

简介：TwonovelasymmetricorganicsmallmoleculesofIT(2FBT-T3Cz)2andIT(2FBT-TT3Cz)2withanindenothiophene(IT)centraldonorcore,fluorinatedbenzothiadiazole(2FBT)asacceptorand3-carbazole(Cz)unitasterminalgroupweredesignedandsynthesizedasthedonormaterialsinorganicsolarcells(OSCs).Thethermal,opticalabsorption,electrochemicalproperty,hole-electronmobility,filmmorphologywerethoroughlystudied.UsingPC71BMasanelectronacceptor,withoutanyadditiveandthermalannealing(TA)treatment,theIT(2FBT-T3Cz)2-basedcellsshowedapromisingpowerconversionefficiency(PCE)of5.81%andtheIT(2FBT-TT3Cz)2-basedcellsexhibitedaPCEof4.39%.OurresultsdemonstratethattheIT-basedasymmetricsmallmoleculescanbedevelopedasapromisingclassofdonormaterialsforhighperformanceOSCs.

简介：Anas-castmagnesiumalloywithhighAlcontentMg15Alwassubjectedtoequal-channelangularpressing(ECAP)throughadiewithanangleofφ=90?at553KfollowingrouteBc.Itisfoundthatthenetworkβ-Mg17Al12phasesintheas-castMg15Alalloyarebrokenintosmallblocksanddisperseduniformlywithincreasingnumbersofpressingpasses.Moreover,manynano-sizedMg17Al12particlesprecipitateintheultra-fineα-Mgmatrix.Thegrainsareobviouslyrefined.However,thegrainstructureisinhomogeneousindifferentareasofthealloy.Theaveragesizeoftheprimaryphaseα-Mgisreducedtoabout1μmwhilegrainsofaround0.1-0.2μmareobtainedinsometwo-phaseareas.WithadditionalECAPpasses(upto8),coarseningofthegrainsoccursbydynamicrecovery.RoomtemperaturetensiletestsshowthatthemechanicalpropertiesofMg15Alalloysaremarkedlyimprovedafter4ECAPpasses.Theultimatetensilestrengthandelongationtofailureincreasefrom150MPato269.3MPaandfrom0.05%to7.4%,respectively.Comparedwiththatafter4passes,theelongationtofailureofthealloyincreasesbutthestrengthofthealloyslightlydecreasesafter8ECAPpasses.FracturemorphologyoftheECAP-processedalloyexhibitsdimple-likefracturecharacteristicswhiletheas-castalloyshowsquasi-cleavagefractures.

简介：Octahedron-likeBaMoO4microcrystalsweresynthesizedbytheco-precipitationmethodatroomtemperatureandprocessedinmicrowave-hydrothermalat413Kfordifferenttimes(from30minto5h).ThesemicrocrystalswereanalyzedbyX-raydiffraction(XRD),field-emissiongunscanningelectronmicroscopy(FEG-SEM)andtransmissionelectronmicroscopy(TEM).XRDpatternsshowedthatthismaterialpresentsatetragonalstructurewithoutthepresenceofdeleteriousphases.FEG-SEMandTEMmicrographsrevealedthattheBaMoO4microcrystalspresentanoctahedron-likemorphologywithagglomeratenatureandpoly-disperseparticlesizedistribution.Thesemicrographsalsoindicatedthatthemicrocrystalsgrowalongthe[001]direction.Theobservedcrystallographicplanesinthesestructuresweremodeledcomputationallyandacrystalgrowthmodelwasproposedinordertoexplainthemorphologicalchangesasafunctionofprocessingtime.

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简介：Ag-TiAlintermetallicalloy,Tie45Ale2Nbe2Mn(at.%)e0.8vol.%TiB2,hasbeenprocessedfromgasatomizedprealloyedpowderbyfieldassistedhotpressing(FAHP).Aninitialanalysisoftheprealloyedpowderhelpedontheunderstandingoftheintermetallicsinteringbehavior.Atomizedpowderconsistedofametastablephasethattransformedintoa2tgequilibriumphasesbythermaltreating.Differentpowderparticlemicrostructureswerefound,whichinfluencethemicrostructuredevelopmentoftheFAHPg-TiAlmaterialdependingonthesinteringtemperature.Duplex,nearlylamellarandfullylamellarmicrostructureswereobtainedatthesinteringtemperaturesabove1000C.Lowerconsolidationtemperatures,below1000C,ledtotheformationofanAlrichphaseatpowderparticleboundaries,whichisdeleterioustothemechanicalproperties.Highcompressiveyieldstrengthof1050MPawasobservedinsampleswithFAHPduplexmicrostructuresatroomtemperature.Whereasnearlylamellarandfullylamellarmicrostructuresshowedyieldstrengthvaluesof655and626MPaatroomtemperatureand440and425MPaat750C,respectively,whicharesuperiorincomparisontosimilaralloysprocessedbyothertechniques.Theseexcellentpropertiescanbeexplainedduetothedifferentvolumefractionsofthea2andgphasesandtherefinementofthePMmicrostructures.