简介：Zr41Ti14Cu12.5Ni8是22.5Fe2体积金属性的玻璃(BMG)在以经常的率的连续加热期间被调查。基于Zr的BMG的玻璃转变和结晶化被存储模量E′的大小因此描绘并且内部磨擦Q−1。有温度的这些动态机械数量的变化被互连并且与以一样的加热率获得的DSC踪迹一致好，这被发现。在内部磨擦曲线的第一座山峰的起源是仔细与动态玻璃转变和随后的主要结晶化有关。而且，它能被一个物理模型很好描述，它能描绘原子活动性和机械反应混乱压缩材料。与DSC踪迹比较，BMG的第一座内部磨擦山峰的相对位置被发现依赖于它对结晶化的热稳定性。

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：基于Mg的氢存储合金MgNi，Mg0.9Ti0.1Ni，和Mg0.9Ti0.06Zr0.04Ni成功地借助于机械alloying(麻省)被准备。结构和这些基于Mg的材料的电气化学的特征被学习。X光检查衍射(XRD)结果证明合金的主要阶段展出非结晶的结构。扫描电子显微镜学(SEM)相片证明Ti和Zr的粒子尺寸代替了合金是在直径的大约24m。合金的周期生活被增加Ti和Zr延长。在50个费用分泌物周期以后，Mg0.9Ti0.06Zr0.04Ni的分泌物能力比MgNi合金的高是91.74%并且37.96%比Mg0.9Ti0.1Ni的高合金。为电极能力腐烂的主要原因是Mg的形成(哦)2(Mg腐蚀的产品)在合金的表面。potentiodynamic极化结果显示做的Ti和Zr在一个碱的答案改进耐蚀。电气化学的阻抗光谱学(EIS)结果建议做的Ti和Zr的那合适的数量显著地改进电气化学的催化活动。

简介：TwonovelwashcoatsCe0.8Zr0.15La0.05OδandCe0.8Zr0.2O2waspreparedbyanimpregnationmethod,whichactedasahostfortheactivePdcomponenttopreparePd/Ce0.8Zr0.15La0.05Oδ/substrateandPd/Ce0.8Zr0.2O2/substratemonolithiccatalystsfortoluenecombustion.ThewashcoatswascharacterizedbyX-raydiffraction(XRD),Ramanspectroscopy,Brunauner-Emmett-Teller(BET),andH2-temperature-programmedreduction(H2-TPR).Theresultindicatedthatboththewashcoatshadstrongvibration-shockresistanceaccordingtoultrasonictest.DopingLa3+intoCeO2-ZrO2solidsolutioncouldgeneratemoreoxygenvacancies,andcouldinhibitthesinterofCeO2-ZrO2solidsolutionwhencalcinedathightemperatures(800,900and1000°C).ThewashcoatCe0.8Zr0.15La0.05Oδhadmuchbetterredoxproperties.ThereductivetemperatureofCe4+speciesshiftedtolowtemperatureby60°Cwhenthewashcoatscalcinedathightemperatures(800,900and1000°C).ThePd/Ce0.8Zr0.15La0.05Oδ/substratemonolithiccatalystcalcinationat500°Chadthebestcatalyticactivityandthe95%tolueneconversionatatemperatureaslowas190°C.Whencalcinedatlowtemperature(500and700°C),thecatalyticactivityhaslittleimprovement,however,whencalcinedathightemperature,thecatalyticactivityofPd/Ce0.8Zr0.15La0.05Oδ/substratemonolithiccatalystshadsignificantimprovement.Ascatalystwashcoat,theCe0.8Zr0.15La0.05OδhadbetterthermalstabilitythanthewashcoatCe0.8Zr0.2O2,thedevelopedPd/Ce0.8Zr0.15La0.05Oδ/substratemonolithiccatalystinthisworkwaspromisingforeliminatingVolatileorganiccompounds.

简介：ThemorphologyandcrystallographyofphasesintheCu-0.12%Zralloywereinvestigatedbyscanningelectronmicroscope(SEM),transmissionelectronmicroscope(TEM),andhigh-resolutiontransmissionelectronmicroscope(HRTEM).Theresultsshowthattheas-castmicrostructureofCu–ZralloyismainlyCumatrixandeutecticstructurewhichconsistofCuandCu5Zrphaseswithafinelamellarstructure.Thedisk-shapedandplatelikedCu5Zrphaseswithfccstructurearefoundinthematrix,inwhichhabitplaneisparallelto{111}aplaneofthematrix.BetweenthecoppermatrixandCu5Zrphase,thereexistsanorientationrelationshipof[112]a||[011]Cu5Zr;(111)a||(111)Cu5Zr.ThespacestructuremodelofCu5Zrphasecanbeestablished.

简介：AZr-1.15wt%Cr-0.10wt%Fealloywasbeta-quenchedfrom1050℃toproduceasupersaturatedα′-phase,andthenheatedforvaryingtimesattemperaturesfrom650℃to760℃toprecipitateZr（CrFe）2.Athermoelectricpower（TEP）techniqueandtransmissionelectronmicroscopy（TEM）wereusedtomonitorthisprecipitationprocess.UsingtheJohnson-Mehl-Avramiequation,theTEPresultsandalineregressionmethod,theactivationenergyfordiffusionandthediffusioncoefficientofchromium（andFe）inα-Zrhavebeencalculatedover650℃～760℃.Thetemperaturedependenceofthediffusioncoefficient,DCr/α（cm2/s）isdescribedat650℃～760℃bytherelationshipformula.ThecoarseningoftheZr（CrFe）2particlesshowsat1/2dependenceofmeanparticlesizeonagingtime,t.Suchatimedependenceistypicalofcoarseningwhereatomtransferacrosstheinterfaceisrate-controlling.

简介：BulkZr55Al10Ni5Cu30metallicglassplateswithadimensionof85mm×35mm×4mmandacomplicatedplatewerefabricatedbyinjectingcastingmethodusingspongyzirconiumandindustrialpurityaluminum,nickelandcopperasrawmaterials.Itwasshownthattheholdingtimeofliquidmetalsatelevatedtemperatureshadagreatinfluenceontheoxygencontentoftheplatesduetothecontaminationresultingfromtheatmosphere.Increasingholdingtimeresultedintheincreaseofoxygencontentintheinjectedalloy.Theglasstransitiontemperaturesofthebulkmetallicglassplatesarehigherthanthatreportedintheliteratureandcrystallizationtemperatureislowerfortheonewithhigheroxygencontentatthesameheatingrate.Theextensionoftheundercooledliquidregion△Txreachingabout87Kis3Khigherthanthatpreviouslyreportedand26Khigherthanthatwithoxygencontentof0.076wtpctfortheonewithoxygencontentashighas0.065wtpct.Thereforetheoxygencontentofthealloyhasasignificantinfluenceontheglassformingabilityandthermalstabilityofbulkmetalglass.Itissuggestedthatdirectcorrelationbetweenhighglassformingabilityandlarge△Txisonlyvalidforawell-definedIowoxygenconcentrationorhastobereconsideredbyincorporatingoxygenasanadditionalalloyingelement.

简介：采用铸锭冶金法制备Al-Zn-Mg-Cu-Zr合金和Al-Zn-Mg-Cu-Zr-Cr-Pr合金,再对其进行均匀化退火（460℃/24h）、锻压、固溶处理—室温水淬及峰时效处理。用金相显微镜观察合金的显微组织,并测试其力学性能,研究复合添加Zr、Cr、Pr对Al-Zn-Mg-Cu超高强铝合金再结晶行为和力学性能的影响。结果表明,复合添加Zr、Cr和Pr可显著抑制Al-Zn-Mg-Cu合金在锻压后回复过程中的亚晶合并长大,使该合金在较高温度（490℃）以及高温长时保温（480℃固溶4h）情况下仍能保持细小的亚晶组织,从而提高合金的力学性能。复合添加Zr、Cr、Pr能使合金在490℃固溶1h后在T6状态下的抗拉强度提高约25MPa、屈服强度提高近30MPa。

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简介：alloying，热处理，并且在Cu-Cr-Zr合金的表演上的塑料工作的影响被调查。猛抛的阶段作为Cr，Cu_(51)Zr_(14)和Cu_5Zr被描绘。Cu-Cr-Zr合金在答案处理，老化处理，和塑料变丑以后表明高力量和高电导率的联合性质。当增加Zrin时，Cr的Precipitationcourse是影响Cu-Cr-Zr合金的传导性的主要因素合金调整在Cr和矩阵之间的取向关系，并且趋于在变丑以后增加年老的Cu-Cr-Zr合金的传导性。

简介：ZR1或许看上去很像普通的科尔维特，但真开起来却要疯狂得多……这可是美国车!到底什么情况？

简介：怎么了？最近情绪有点儿低落啊？我保证ZR-1能把你头上的阴霾一扫而光，让你的情绪高涨起来、脸上又挂起开心的笑容。你还别不信。真的，每天花1小时驾驶ZR-1燃烧激情，家里人肯定不会再催你去看心理医生了。

简介：踏板车由于操控简单、灵活实用，外观又简约时尚，一直深受年轻男女的喜爱，尤其是在地域狭小、交通拥挤的台湾、澳门、香港等地，更成为日常代步不可缺少的重要交通工具。随着使用人群的扩大，用户逐渐不满足于踏板车简单的代步功能，对娱乐、消遣功能的开发越来越深入，于是，踏板车在这些地区的改装和运动文化也越来越兴盛。

简介：TheintermetalliccompoundZr1-xTixCowaspreparedanditssuitabilityforhydrogenstoragewasinvestigated.ThealloysobtainedbymagneticlevitationmeltingwiththecompositionofZr1-xTixCo(x=0,0.1,0.2and0.3,at.%)showsinglecubicphasebyX-raydiffraction.Asingleslopingplateauwasobservedoneachisothermal,andpressure-composition-temperature(PCT)measurementresultsshowthattheequilibriumhydrogendesorptionpressureofZr1-xTixCoalloyincreaseswithincreasingTicontent.Thedesorptiontemperaturesforsupplying100kPahydrogenareabout665,642,621and614KforZrCo,Zr0.9Ti0.1Co,Zr0.8Ti0.2CoandZr0.7Ti0.3Coalloy,respectively.RepeatedhydrogenabsorptionanddesorptioncyclesdonotgenerateseparatedZrCo,TiCoandZrH2phases,indicatingthatalloyshavegoodthermalandhydrogenstabilization.

简介：X－raydiffraction(XRD)anddifferentialscanningcalorimetry(DSC)wereemployedtoinvestigatetheinfluenceofNicontentonthecrystallizationofamorphousZr70Cu30-xNix(atomfrationin%)alloys,ExperimentalresultsshowthatwiththeNicontentincreasingtheactivationenergiesforcrystallizationofamorphousZr70Cu30-xNixalloysincreasecorrespondingly,indicatingthatthethermalstabilityisgreatlyimproved.AlltheDSCtracesofamorphousZr70Cu30-xNixalloysexhibittwoexothermicpeaks,suggestingthatthecrystallizationprocessviaadouble-stageticles,whilethesecondonecorrespondstotheprecipitaionofnano-scaleZr2Niphaseandcrystallizationofresidualamporphousphase,ThemechanismonthecrystallizationofamorphousZr70Cu30-xNixalloyswasdiscussed.

简介：摘要：为解决传统能源中的不可再生问题，传统能源在利用时，大多通过燃烧，但在燃烧的过程中又会产生不同的气体、烟尘微粒、污染的空气以及排放温室气体等，严重影响了人类的身体健康以及生产生活，为此借助新能源技术为系统提供用电，并进一步通过系统的优化作用，净化循环所处环境的空气。为提高系统对所处环境情况判断的准确性与稳定性，降低误判概率，拟采用空气质量传感器与温度传感器等多传感器结合，通过多个阈值共同分析处理所处环境空气的参数情况，从而提高系统判断以及运作的稳定性与准确性。

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简介：ByaddingmixtureofZrO2andcarbon,aZr-enhancedcompositecoatingwasproducedontoanAISI1045substratebylasercladding.Themicrostructureandphaseformation,microhardnessandwearresistanceofthecompositecoatingwerestudied.Theexperimentalresultsindicatethatthecompositecoatingwithmetallurgicalbondingtosubstrateconsistsof7-Ni,massiveceramicparticlesofZrC,NiZra,NiTZr〉（Fe,Ni）23C6andF%C.Theinsitu-synthesizedZrCparticlesareuniformlydispersedincompositecoating,whichrefinesthemicrostructureofcompositecoating.WithdifferentZrO2andcarbonaddi-tions,thepropertiesareimproveddifferently.Finally,thefineinsituZrCparticlesimprovethemicrohardnessofcompositecoatingtoHVo.2650,whichisnearly2.7timesthatofNi25coating.Also,thecompositecoatinghasanadvantageinwearresistance;itoffersbetterwearresis-tancewhenmoremixtureofZrO2andcarbonwasaddedinnickelalloys.

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