简介:采用液态磷酸盐浸渍及不同的热处理技术在C/C复合材料表面制备抗氧化涂层。实验结果表明:采用1-2℃/min慢速冷却制备的材料A在700℃氧化20h后的氧化质量损失达到47%,而采用快速气冷技术制备的材料B的氧化质量损失仅仅为0.98%。SEM形貌观察表明:材料A的磷酸盐涂层表面疏松,充满大量孔洞、裂纹,以及片状结晶、团聚的磷酸盐,而材料B的涂层致密、完整,为玻璃态。氧化实验后,材料A的涂层在8h氧化阶段就已消耗殆尽,抗氧化能力基本消失;而材料B的涂层在8h实验后表面涂层完整、致密,无明显损伤,在20h实验后出现了较多的孔洞,抗氧化能力逐渐降低。
简介:采用简单的化学沉积结合KOH碱刻蚀的方法,在导电玻璃(FTO)上生长ZnO纳米棒阵列(ZnONRs)。用X射线衍射(XRD)、扫描电子显微镜(SEM)、电流-电压(I-V)曲线对所得样品的晶型、形貌及光电性能进行测试,结果表明:ZnONRs呈纤铅矿型;ZnONRs的形貌及光电性能与KOH的浓度及刻蚀时间密切相关,经0.1mol/LKOH刻蚀1h后可得到排列高度有序且分布均匀的ZnONRs;KOH刻蚀后的ZnONRs与未刻蚀前高密度的ZnONRs相比,其光学性能得到提高。0.1mol/LKOH刻蚀1h的ZnONRs作为太阳能电池的光阳极,其光电转换效率、短路电流、开路电压较未刻蚀的ZnONRs分别提高了0.71%、2.79mA和0.03V。
简介:[篇名]SignificantincreaseinmachinepartdurabilityandlongevityduetothenewpatentedLincarb,LinterprocessandLinheattechnologies,[篇名]Lasersurfacetreatmentofsteels,[篇名]ForecastingofthePhaseTransformationHardenedZoneandGorrelationInfluenceFactorsintheSurfaceHeatTreatmentbyPlasma,[篇名]Fatigueandfracturebehaviorofalasersurfaceheattreatedmartensitichigh-nitrogentoolsteel,[篇名]Theoreticalmodelsofsurfaceheattreatmentofproductsinsolarfurnaces-1:uniformradiant-energyflux。
简介:CorrelationbetweentheflnorescentmaterialsproducedbyendosymbioticpseudomonasfluorcscensFPT-9601andmicrobialcontrolofsoil-bornebacterialdiseaseusingthisstrain;CORROSIONOFALUMINUMALLOY2024BYJETFUELDEGRADINGMICROORGANISMS;Developmentandtestingofnewvolatilecorrosioninhibitorsfornultimetalsystems;Developmentofdiscbrakerotorsforheavy-andmedium-dutytrackswithhighthermalfatiguestrength;DimethylSulfideRemovalfromSyntheticWasteGasUsingaFlatPoly(dimethylsiloxane)-CoatedCompositeMembraneBioreactor。
简介:AStudyofMicrobiologicallyInducedCorrosionbySRBonCarbonSteelusingHydrogenPermeation,Alloying,DeoxidizingandInoculatingCastAlloyswithPressedPowderPseudo-MasterAlloys,Anaerobicdigestionforreductionandstabilizationoforganicsolidwasteduringspacemissions:Systemsanalysis,Anaerobicdigestionforreductionandstabilizationoforganicsolidwastesduringspacemissions:Laboratorystudies,AssessmentofmicrobialcommunityvariabilityinreplicatetubularnitrifyingbioreactorsusingPCRandTRFLPanalysis.
简介:Dampingahybridsteppingmotorwithestimatedpositionandvelocity,Gridcurrentregulationofathree-phasevoltagesourceinverterwithanLCLinputfilter,TorsionalinteractionstudiesonpowersystemcompensatedbySSSCandfixedcapacitor,Amultivariablenewcontrolsolutionforincreasedlonglinesvoltagerestorationstabilityduringblackstartup,