简介：Theelectronbeamwelding-brazingbeingusedtojoin5A06AlalloytoTC4Tialloydecreasestheformationofbrittleintermetalliccompound.Experimentswerecarriedouttostudytheinfluenceofelectronbeamweldingparametersonthetensilestrengthofwelds,basedonanorthogonaltestandanalysismethod.Theweldingparametersincludebeamcurrent,weldingspeed,scanningfigure,scanningfrequency,figuresize,beamoffsetandfocuscurrent.Theoptimumparametersfor3mm5A06Alalloyand2mmTC4alloywereasfollows:accelerationvoltagewas60kV,beamcurrentwas11mA,weldingspeedwas600mm/min,focuscurrentwas0mA,scanfigurewasO,scanningfrequencywas1000Hzandbeamoffsetwas0.5mm.Theresultsshowthatthejointswerewithgoodappearanceandqualityweldedbytheoptimumparameters.ThesuccessfuljointscouldbegainedandthemaximumtensilestrengthofAl/Tidissimilaralloyjointscouldbeupto222.61MPausingelectronbeamwelding-brazing.

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简介：采用电子束和真空白耗电弧熔炼法制备Nb-Ti-Al（质量分数，％）合金，利用料浆熔烧法在合金表面制备Si—Cr-Ti涂层，研究在1400℃下合金与涂层的氧化行为。通过X射线衍射（XRD）、扫描电镜（SEM）、能谱分析（EDS）及电子探针微区分析（EPMA）研究基体与涂层氧化前后的组织形貌变化及成分分布。结果表明：Nb．40Ti-7A1合金在1400℃氧化1～11h后，氧化产物均主要为TiNb2O7、TiO2、Al2O3；氧化前，涂层丰要由（Nb，Ti，Cr，A1）Si2主体层与（Ti，Nb，Al）5Si3过渡层组成，高温氧化后涂层表面形成含有A1203、Ti02的Si02阻挡层；合金与涂层的氧化行为均遵循抛物线规律，合金在1400℃氧化11h的单何面积质量增量为161．98mg／cm2，而涂覆涂层后单位面积质量增量降至9．56mg／cm2，表明Si-Cr-Ti涂层具备良好的高温抗氧化性能。

简介：国内外许多材料科学工作者对层状陶瓷Ti2AlC的合成进行了大量的研究,他们分别采用了自蔓延(SHS)、热压(HP)、热等静压(HIP)等方法,合成了该化合物.用HIP法能制备出高纯、致密的Ti2AlC陶瓷.最近,作者以Ti/Al/C元素粉为原料,采用原位热压的方法,成功地合成了多晶Ti2AlC块状材料.

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简介：微观结构和Al-Cu-Mg-Ag合金的机械性质上的Ce和Ti增加的效果被学习了。Ce或Ti能减少，这被显示出Al-Cu-Mg-Ag合金的当演员组谷物尺寸，为Ω的成核比率作为异构的成核中心分阶段执行，在老化期间禁止Ω阶段的生长，并且因此增加Ω的间距分阶段执行的体积部分和减少的增加。这些微观结构增加收益力量和张力的力量。然而，如果Ce和Ti被加到合金，他们形成(Ce，Ti)包含的混合物和增加谷物在扔期间缩放，但是没在老化期间在成核和Ω阶段的生长上有效果。包含Ce和Ti的合金与包含Ce或Ti的合金相比有相对更低的Vicks坚硬和力量。

简介：Abstract:Theeffectofstabilizingelements,suchasNbandTi,onthemicrostmctureandpropertiesoflowcarbonferriticstainlesssteel(FSS)hasbeeninvestigated.TheresultsoftheThermo-calcsimulationhaveshownthattheinterstitialelements,suchasCandN,maybecompletelystabilizedbytheadditionofNbandTi.WiththeincreaseofNbandTicontents,thea+γtwophasesgraduallytransfertoasingleα-phaseunderahightemperaturecondition,andthecontentofthecarbideM_(23)C_6graduallydecreases.ThemicrostructurehasindicatedthatthecombinedadditionofNbandTicanpromotetherecrystallizationofthebandstructureandformmoreuniformequiaxedgrains.Also,withtheincreaseofNbandTicontents,theelongation,ther-valueandthecorrosionresistanceofcold-rolledandannealedsheetsareimprovedprominently.IncomparisonwiththeeffectofTi,theadditionofNbismorebeneficialtotheincreaseofr-valueandthecorrosionresistance.

简介：研究了离子束辅助沉积(IBAD)制备氮化钛(TiN)重要参数氮钛到达比(N/Ti)对膜层性能的影响,并且采用俄歇谱分析(AES)、光电子谱分析(XPS)、X射线衍射分析(XRD)对膜层进行了相组成与成分分析,摸索了N/Ti对膜层的影响规律.

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简介：Aim:Tostudythestrengthandmicrostructureoftrace-Ti-bearingstracturesteel.MaterialsandMethods:ThestrengthandmicrostructureofthetraceTibearingstructuresteelwerestudiedbytwokindsofcontrolledcoolingsimulationtestingresultsinthefirststagecoolingandthelaststagecoolingafterhotpressdeformationinthetrace-Ti-bearingstructuresteel.Results:Itshowedthattheferritegrainsize,therelativecontributionoftheinvolvedstrengthandthemechanicalstrengthwereinfluencedmoreorlessbydifferentcoolingrates.Boththerefinementofferritegrainandtheincreaseofmechanicalstrengthcouldbeobtainedbytheproperdecreaseofwatercoolinginterruptiontemperature(WTI)andcoilingtemperature(CT)inthefirststagecoolingortheproperincreaseofwatercoolingbeginningtemperature(WTB)andproperdecreaseofcoilingtemperature(CT)inthelaststagecooling.Conclusion:Thestrength,theferritegrainrefinementandtheyieldtensileratiointhefirststagecoolingprocessaremuchbetterthanthoseinthelaststagecoolingprocess.

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简介：EspritTi系列首次将先进的热成像技术与Esprit一体化定位系统相结合：摄像机．镜头．防护罩、云台及解码器高度集成于一体。

简介：TheeffectofTi(C,N)onpropertiesoflow-carbonMgO-Cbrickswasinvestigated.Thephasecompositionandthemicrostructureofthematrixoflow-carbonMgO-CbrickcontainingTi(C,N)werestudiedbyXRDandSEManalysistogetherwithEDS.TheresultsshowedthatTi(C,N)distributedinthematrixoflow-carbonMgO-Cbrickuniformlyafterbeingtreatedat1600℃for3hincokepowderbed,andTi(C,N)andMgOformedasolidsolution.Afterthetreatmentat1600℃for3hincokepowderbed,thebulkdensityandcoldcrushingstrengthoflow-carbonMgO-CbrickwithTi(C,N)decreased,andtheapparentporosityandlinearchangerateofspecimensincreased.Theoxidationresistanceoflow-carbonMgO-CbrickwithTi(C,N)wassuperiortothatoflow-carbonMgO-Cbrickwithnoadditives,butinferiortothatoflow-carbonMgO-CbrickwithAlpowder.TheslagresistanceofthespecimenwithTi(C,N)wasexcellentaswell.

简介：利用线性伏安法和恒电流电解法研究了苯酚在Ti／PbO2电极上的电催化氧化反应，通过电氧化过程中反应物和中间物的高效液相色谱测定，研究了苯酚在Ti／PbO2电极上电催化氧化的反应机理．实验发现，Ti／PbO2电极对水溶液中苯酚的电氧化具有显著的催化作用，25℃时，对初始浓度为2mmol／L的苯酚水溶液，恒定电流密度为50mA／cm2，电解3h，苯酚转化率为98．02％，有机碳去除率为54．36％．苯酚在Ti／PbO2电极上电催化氧化要经过对苯二酚或邻苯二酚、对苯醌、反丁烯二酸和草酸，最终变成二氧化碳和水的历程．第一步反应苯酚转化的主产物是对苯二酚．对苯二酚转化为苯醌和苯醌转化为反丁烯二酸的反应为慢反应，反丁烯二酸转化为草酸的反应为快反应．

简介：PhotocatalyticH2productionhasemergedasoneofthemostcleanandpromisingrenewableenergysources.InspiteoftheeffortstoobtainefficientphotocatalystsabletoproduceH2fromSunlightandwater,thereisstilltheneedtopreparecheaperandenvironmentalfriendlierphotocatalysts.Phosphatebasedmaterialscouldbegoodcandidatestofulfilltheserequirements.InthismanuscriptwehavepreparedasetofmixedTi3+/Ti4+valence,open-frameworktitaniumphosphates（of-TiPO4）andmixedtitaniumoxide/phosphatederivatives（cr-TiP）,correlatingtheirstructureandcompositionwiththephotocatalyticactivityforH2production.Wedeterminedthatmixedtitaniumoxide/phosphatecrystallinephasesproducedenhancedH2evolutionunderSunsimulatedlightirradiationthanmixedTi3+/Ti4+valence,open-frameworktitaniumphosphatesandtitaniumoxidephases.