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简介：Newmathematicaldiffusionmodelsforsolidstatehomogenizationofdendritesegregationwerepresentedtocalculatetheconcentrationevolutionofalloyingelementsduringsolid-statehomogenizationofdendritesegregationinanycrosssectionofathree-dimensionaldendritesystem.Withmathematicalaccumulation,alltheindividualconcentrationprofilesofeverydendritecanbeaccumulatedtoformaconcentrationequation,whichmayberequiredbysinemodelornot.Thendiffusionhomogenizationprocessesforanycrosssectionsofdendritesinsolidstatecanbecalculatedfromtheequation.TheonlyassumptionofthenewmodelswasthatanyindividualconcentrationprofileinadendritesystemcouldbesimulatedbyGaussequationofFick-2law.

简介：与一个二阶段的方法，分散得好有狭窄的尺寸分发的5.2nmAgnanoparticles(

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).

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简介：磨擦促使处理(FSP)作为在12修理裂缝的一个方法被调查?公里厚304L不锈钢板。愈合的可行性被用一个PCBN/W-Re工具处理一个逐渐变细的裂缝与表明一25?公里直径肩膀和6.4的大头针长度?公里。实验证明愈合是可能的开始的一个裂缝狭窄然后日益增多地长大到2的宽度?公里。板实验上的祷告被用来为创造发现最好的参数一巩固与贱金属相比与坚硬差别的最少的数量搅动地区。在一些标本的谷物精炼更高导致了大部分搅动地区坚硬，与贱金属相比。谷物尺寸对microhardness的一个阴谋显示出在谷物尺寸和坚硬之间的很强壮的反的关联，从Hall-Petch关系期望。腐蚀测试被执行以便在stir地区的潜在的促进感受性上评估FSP的效果。在1000以后?在在没有腐蚀产品在基础材料控制上或在任何磨擦上形成了，这被发现的房间温度的3.5%盐溶液的断断续续的沉浸的h搅动处理标本。

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简介：Becauseoftheexcellentmechanicalpropertiesof34C「NiMo6steel,itiswidelyusedinhigh-valuecomponents.Manyconventionalapproachestostrengthening-steelstypicallyinvolvethelossofusefulductility.Inthisstudy,34CrNiMo6Steelhavinghighstrengthandductilityisproducedbylasersolidforming(LSF)w让haquenching-tempering(QT)treatment.TemperingofbainiteismainlybysolidphasetransformationinthepreviousLSFlayersduringtheLSFprocess.ThestablemicrostructureofLSFconsistsofferriteandfinecarbides.Themicrostructuretransferstotemperedsorbiteafterheat-treatment.ThetensilepropertiesoftheLSFsteelmeetthoseofthewroughtstandard.TheUTSandelongationofLSFsampleat858MPa,19.2%,respectively,aregreaterthanthoseofthewrought.TheQTtreatmentenhancedtheultimatetensilestrengthandyieldstrengthoftheLSFsample.Theultimatetensilestrength,yieldstrength,reductioninarea,andelongationoftheLSF+QTsampleat980MPa,916MPa,58.9%,and13.9%,respectively,aregreaterthanthoseofthewroughtstandard.TheyieldstrengthoftheLSF+QTsampleisapproximately1.27timesthatofthewrought.TheLSFsamplesfailedinaductilefracturemode,whiletheLSF+QTsamplesshowedmixed-modefailure.ThedefectshaveonlyasmalleffectonthetensilepropertiesowingtotheexcellentductilityoftheLSFsample.

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简介：Quasi-solid-statedye-sensitizedsolarcells(DSCs)werepreparedusinggelelectrolytegelatedbypoly(ethylene-oxide)(PEO)withdifferentmolecularweight.WiththeincreaseinPEOmolecularweight,theshortcircuitcurrentdensities(Jsc)increasesignificantly,whichisrelatedtotheincreaseinI-diffusionduetotheincreaseinfreevolumeofgelelectrolyte.However,onlyaslightincreaseinopenvoltage(Voc)isobserved,whichisexplainedbythedecreaseindarkcurrentarisingfromthereductionoftriiodide(I3-)byconductionbandelectrons.

简介：形成的激光固体(LSF)扔的Inconel718superalloys是在顺序(SITA热处理)与答案处理，中间的热处理(IHT)和二阶段的老化处理对待的热。微观结构，张力的性质和在500袠的LSFedInconel718superalloy的槽口敏感上的IHT温度的效果？？

简介：Thestudyofthetriplejunctionsofthegrainboundariesinsomefccsolidsolutions,orderedalloysandintermetallicswithL12hasbeencarriedoutusingtheopticalmetallographyandTEMmethods.Two-typesofthetriplejunctionswerefoundinthealloysinvestigated(1),consistingoftheboundariesoftherandom(RT),and(2),consistingoftheRTboundaryandthespecialboundaries(ST).TherelativevaluesoftheRTandSTboundaryenergyweredeterminedonthebasisofthemeasurementsoftheanglesbetweenthegrainboundaryplanes.IthasbeenshownthattheenergyofSTboundariesincreaseswiththeincreaseofthestackingfault(SF)energy.TheenergyoftheRTboundariesdoesnotdependontheSFenergy.

简介：ThedensityofNi-Alalloysinbothliquidstateandsolid-liquidcoexistencestatewasmeasuredwithamodifiedpycnometricmethod.ItwasfoundthatthedensityofNI-AlalloysdecreaseswithincreasingtemperatureandAlconcentrationinthealloys.ThemolarvolumeofliquidNi-AlbinaryalloysincreaseswiththeincreaseoftemperatureandAlconcentration.ThepartialmolarvolumeofAlinNI-Albinaryalloywascalculatedapproximately.ThemolarvolumeofliquidNI-Alalloydeterminedinthepresentworkshowsanegativedeviationfromtheideallinearmolarvolume.

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简介：Thelargesize,crack-freeZr55Cu30Al10Ni5bulkmetallicglass(BMGs)withthediameterof54mmandtheheightof15mmwasbuiltbylasersolidformingadditivemanufacturingtechnology,whosesizeislargerthanthecriticaldiameterbycasting.Themicrostructure,tensileandcompressivedeformationbehaviorsandfracturemorphologyoflasersolidformedZr55Cu30Al10Ni5BMGswereinvestigated.Itisfoundthatthecrystallizationmainlyoccursintheheat-affectedzonesofdepositionlayers,whichconsistofAl5Ni3Zr2,NiZr2,ZrCu,CuZr2phases.Thecontentofamorphousphaseinthedepositisabout63%.Underthecompressiveloading,thedepositpresentsnoplasticitybeforefractureoccurs.Thefractureprocessismainlycontrolledbytheshearstressandthecompressiveshearfractureanglesofabout39.Thecompressivestrengthreaches1452MPa,whichisequivalenttothatofas-CastZr55Cu30Al10Ni5BMGs,andthereexistvein-likepatterns,river-likepatternsandsmoothregionsatthecompressivefractography.Underthetensileloading,thedepositpresentsthebrittlefracturepatternwithoutplasticdeformation.Thefractureprocessexhibitsnormalfracturemodel,andthetensileshearfractureangleofabout90°.Thetensilestrengthisonlyabout609MPa,andthetensilefractographymainlyconsistsofmicro-scaledcoresandvein-likepatterns,dimple-likepatterns,chocolate-likepatternsandsmoothregions.Theresultsfurtherverifiedthefeasibilityandlargepotentialoflaseradditivemanufacturingonfabricationandindustrialapplicationoflarge-scaleBMGsparts.

简介：Anitrate-citratecombustionroutetosynthesizeLa0.9Sr0.1Ga0.8Mg0.2O3-δpowderforsolidoxidefuelcellapplicationwaspresented.Thisrouteisbasedonthegellingofnitratesolutionsbytheadditionofcitricacidandammoniumhydroxide,followedbyanintensecombustionprocessduetoanexothermicredoxreactionbetweennitrateandcitrateions.TheoptimumtechnicalparametersarethatthepHvalueis5,andthemolarratioofcitricacidtothetotalmetallicionis1.5:1.X-raydiffractioncharacterizationofcalcinedgelshowsthatpurephasewassynthesizedaftercalcinationat1400℃for10h,andtheTEMresultshowsthecalcinedpowderwithaverageparticlesizeisabout150nm.Thegrainresistancecontributestothetotalresistanceofsinteredpelletbelow500℃.Theconductivityofthesinteredpellentat800℃was0.07S-1.cm-1higherthantheconductivityofYSZ(0.05S-1.cm-1at800℃)