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简介：Anewpotassiumnitrate(KNO_3)/diatomiteshape-stabilizedcompositephasechangematerial(SSCPCM)waspreparedbythemixingandsinteringmethod.KNO_3servedasthephasechangematerial(PCM)forthermalenergystorage,whilediatomiteactedasthecarriermatrixtoprovidethestructuralstrengthandpreventtheleakageofPCM.ItwasfoundthatKNO_3couldberetained65wt%intoporesandonsurfacesofdiatomitewithouttheleakageofmeltedKNO_3fromtheSS-CPCM.ThecalculatedfillingrateofmoltenKNO_3thatcouldenterintothedisc-likeshapeporeofdiatomiteverifiedthescanningelectronicmicroscopyimagesofSS-CPCM.X-raydiffractionandFouriertransforminfraredspectroscopyresultsshowedthatnoreactionoccurredbetweenKNO_3anddiatomite,performinggoodcompatibility.Accordingtothedifferentialscanningcalorimetryresults,after50thermalcycles,thephasechangetemperaturesformeltingandfreezingofSS-CPCMwith65wt%KNO_3werechangedfrom330.23°Cand332.90°Cto330.11°Cand332.84°Candcorrespondinglatentheatsvariedfrom60.52J/gand47.30J/gto54.64J/gand41.25J/g,respectively.TheKNO_3/diatomiteSS-CPCMmaybeconsideredasapotentialstoragemediainsolarpowerplantsforthermalenergystorage.

简介：Themicrostructureevolutionandphasecompositionofanα+βtitaniumalloy,Ti-3Al-5Mo-4.5V(wt.%),havebeeninvestigated.Electronprobemicroanalysis(EPMA)quantitativeresultsmanifestthatthestabilityofβphasedecreaseswithincreasingquenchingtemperature,whichisinfluencedbythesignificantvariationofβ-stabilizingelementsconcentration.Detailedmicrostructureanalysisshowsthattheβ→ωphasetransformationdoesoccurwhenquenchingat750℃and800℃.Theω-reflectionschangefromincommensurateω-spots(750℃)toidealω-spots(800℃)astheβstabilityofthealloydecreases.Furtherthedecreaseofβphasestabilityencouragestheformationofathermalα"martensite,whichhasthefollowingorientationrelationships:[111]β//[110]α",[100]p//[100]α"and[-110]p//[00-1]α"withrespecttotheβmatrix.

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简介：Solidificationstructurevariationofsinglephasealloywithundercoolingpriortonucleationhasbeenwidelystudied.Theprogress,especiallyduringthelastdecade,isreviewedsoastogiveacomprehensiveknowledgeforit,inwhichtheemphasesarelaidonthestructureevolutionmechanismandthepotentialapplication.Lastly,thefutureinterestingsubjectsarepresented.

简介：一半房间潜力(HCP)；与氯化钠做的增强的具体标本的腐蚀电流在电气化学的氯化物抽取(ECE)以后被决定。试验性的结果证明当ECE处理被移开时，HCP变得更否定；腐蚀电流在ECE处理前与那些相比变得更大，然后，HCP断然变；腐蚀电流与时间减少。在30天ECE处理以后，标本在暴露的钢附近由于足够的氧的存在转到大约100mV的cored的HCP锁，要不是核心un的标本，更长的时间，大约二个月，是被订。在在ECE处理以后的一样的标本的不同的层的非同类的HCP分发可能导致钢的第二等的腐蚀。

简介：NiTialloyisproducedbymechanicalalloying(MA).Itbecomesamorphousaftermillingforenoughtime,suchas100hinthispaper.DSCmeasurementshowsthatthecrystallizationtemperatureis676Kfortheamorphouspowder.Activationenergyofcrystallizationis199.98kJ/molforMApowder,whichislowerthanthatofamorphouspreparedbymagnetronsputtering.Avramiparameterofcrystallizationis1.07.

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简介：Aseriesofsolarradiationtestsforthepolytetrafluoroethylene(PTFE)bulkandfilmsampleswerecarriedoutusingQ-SUNXE-3-HSCtypeSolarRadiationSimulator,withthetestparametersasfollows:radiationintensityis1120W/m~2,temperatureis55℃andhumidityis70%RH.Surfacemorphology,compositionandmicrostructureofthePTFEsamplesbeforeandafterradiationtestswerecharacterizedcontrastively.EffectofsolarradiationonthetribologyandwettingpropertiesofPTFEwerealsostudiedbytribometerandcontactangletester,respectively.Theresultsshowthat,forradiatedPTFE,surfaceroughness,therelativecontentofCelement,thefrictioncoefficientsandthecontactanglewithwaterincreasedinvaryingdegrees.Inconclusion,theobviouschangeinPTFEsamplescanbemainlyattributedtobreakof(CFx)-CbondsafterbombardmentofhighenergyUVphotons,whichcausesthelossofF-richgroups,oxidation,crosslinkingandrestructuringofactiveunsaturatedgroups.

简介：阶段地水晶(陆军)模型被用来模仿premelting脱臼运动对称当系统温度在时，在紧张行动下面倾斜谷物边界(STGB)远非，到融化的融化的点和结束分别地指。结果证明当premelting温度被接近到，本地premelting发生包围脱臼从在温度下面。STGB的premelting脱臼能在紧张行动下面滑行，并且premelting区域是为脱臼滑行的一个同伴。STGB腐烂的过程以二个高温度条件是很类似的。当premelting介绍，它减少为脱臼的滑行抵抗并且导致脱臼的一个更快的运动，并且也在STGB的腐烂过程期间引起系统的更多的精力减小。尽管有把紧张用于这些，premelting在STGB的整个腐烂过程取样，premelting脱臼区域显然不发展并且延长。这显示外部紧张行动不在高温度支持premelting，并且不能导致更多的premelting脱臼，它能在脱臼展览附近被欠到premelting阶段像液体的性质并且到容易滑行并且放松紧张精力的premelting脱臼；这与实验和分子的动力学的结果一致。

简介：Thepurposeofthisresearchistoquantifytheeffectsofcompositionalandprocessingparametersonthemicrostructureandpropertiesofdualphasesteelproduceddirectlybyhotrollingandrapidcooling.Steelswiththebasecompositionof0.1%C,1.4%Si,and1.0%Mnwithadditionsof0.5%Crtoinfluencehardenability,0.04%Nbtoretardrecrystallizationinthelatterstagesofrolling,or0.02%Titoinhibitgraingrowthduringandafterreheatingwereinvestigated.Investigationwasmadetopredictmicrostructureevolutionandtocorrelatemicrostructurewithprocessingparameters.Theeffectsoftheimportantmicrostructureparameterssuchasferritegrainsize,martensitevolumefraction(VM)andmorphology(polygonalorfibrous)onthetensileandimpactpropertiesarediscussed.Multiplelinearregressionanalysisoftheultimatetensilestrengthhasshownthat,increasingVMandmartensitemicrohardnessandgrainrefinementofferritearethemajorcontributionstoincreasethestrengthofthesteel.Itwasfoundthatthedual-phasesteelproducedbycontrolledrollingprocess,withamicrostructurewhichconsistedoffinegrainedferrite(4μm)and35%～40%fibrousmartensite,presentedoptimumtensileandimpactpropertiesbecauseofenhancedresistancetocrackpropagation.

简介：Theinfluenceofthevolumefractionoftemperedmartensiteonmagnetomechanicaldampingoftheferriticmatrixindual-phasealloyswasstudied.Theexperimentalresultsshowedthat（1）dual-phasedampingalloyisofgoodcombinationofstrengthandtoughness:（2）gooddampingca-pacity(Q-1≥5.0×10-3)canbeobtainedindual-phasealloysonlywhenthevolumefractionoftemperedmartensitewascontrolledproperly.Theeffectofmartensiteonmagnetomechanicaldamp-ingoftheferriticmatrixwasanalysed.Thedampingcapacityofdual-phasealloyswasrelatedtothevolumefractionVmoftemperedmartensitebyQ^{-1=Q-1（1-Vm/1+BVm）atsmallvibrationstrainamplitudesεA≤5.0×10-6.}

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简介：阶段地水晶(陆军)模型被雇用与格子失配和一个小倾斜角度在飞机凸的底层上模仿取向附生的层的生长的过程。系统的免费精力，取向附生的层的全部的原子序数，和弯曲和底层的角度的效果的变化被分析。结果证明当底层的表面是飞机时，免费精力随底层倾斜角度的增加增加，并且也，取向附生的层的全部的原子序数增加；当底层的表面是凸的时，免费精力随底层角度并且那么也的增加减少取向附生的层减少的全部的原子序数。这是取向附生的层的表面的边疆与增加凸的底层的倾斜角度从步bunching改变到hill-and-valley方面结构的原因。这些结果在对另外的方法结果的好同意。

简介：AZ31Mg合金的微观结构进化在变化隧道期间，尖挤出(CCAE)被调查。AZ31Mg合金的谷物在在523K使变形的CCAE以后从500m显著地被精制到15m。脱臼在挤出的起始的阶段被导致，他们自己重排在变丑期间形成脱臼边界和亚谷物边界。当通过有紧张的水平变化隧道的标本增加了时，亚边界演变到高角度谷物边界(HAGB)。谷物精炼的过程能被描述为连续动态恢复和再结晶(CDRR)。

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简介：Theformationandevolutionofdeformationtextureinpolycrystallinematerialsarestudiedbyphase-fielddynamicmodel.Inaddition,thedrivingforceoftextureevolutionisalsodiscussed.Inthismodel,grainswithdifferentorientationaredefinedbyasetofcontinuousnon-conservedorderparameterfields.Simulationresultsshowthatgrainswithpreferredorientationgrowattheexpenseofthosewithunfavorableorientations.Itismoreimportantthat,elasticpotentialratherthanelasticenergyplaysacrucialroleintheevolutionoftexturewhetherthepolycrystallinesystemissubjectedtouniaxialstressorshearstress.

简介：Byasimplephasefieldmodel,aseriesofnumericalsimulationsofsolidificationmicrostructurewasperformedtoshowarichvarietyofdendriticpatterns.Atthesametime,therelationbetweenthemorphologyofgraingrowthandsomeparametersincludingthestrengthofanisotropy,dimensionlesslatentheatandthesizeofinitialsolidzonewasstudied.Itisforthefirsttimethatpatternsofgraingrowthwereassociatedwiththesizeofinitialsolidzone,whichisaninterestingissue.Thepossiblereasonforthismaybethatvariationinthesizeofinitialsolidzonemaybringaboutfluctuationoftheinterfaceenergy,makingtheinterfaceunstable.