简介:Theinterfacialbindingcovalentbonddensity(CBD)andthelocalenvironmentaltotalbondorder(LTBO)oftheNi/Ni3Alinterfacewithdifferentlatticemisfits(δ)werecalculatedbyusingfirst-principlesdiscretevariationXαmethod.ItwasfoundthattheeffectsoflatticemisfitsontheelectronicstructuresofincoherentNi/Ni3Alinterfacewereveryobvious.Ononehand,lessthan-0.6%negativelatticemisfitcanpromotethebindingstrengthofγ/γ′interface.Ontheotherhand,thetotalbondingstrengthofγ/γ′interfacedecreaseswithincreasingδ.Therefore,themagnitudeandsignoflatticemisfitmustbecarefullycontrolledforbalancingthehightemperaturecreepstrengthofNi-basesinglecrystalsuperalloyandthestructuralstabilityofγ/γ′interfacewhenonedesignsanewNi-basesinglecrystalsuperalloy.
简介:由Synechcoccus在Ni的简历累积上影响因素在这篇论文被学习。当到干燥重量集中ofSynechcoccus的Ni的集体比率是16-18%时,简历累积在附近是在水的solution.Bioaccumulation数量的80min的Ni的使平衡时间到达了最大值。Bioaccumulation数量与增加pH增加了。最佳pHwas9-10和更高的pH导致了Ni的降水(哦)_2。Bioaccumulation数量被在35℃到达他们的optima的温度和轻紧张也影响,无生命的水藻的3000Ixrespectively.Bioaccumulation比生活水藻的大。
简介:AseriesofNi-Hrechargeablebatterieswithatrademarkof‘JJJ’weresuecessfullydevelopedbyJiangnanTribleJcorporation,GuangdongProvince,andwereputintobatchproductionthisyear.ResearchonNi-HbatteryisoneoftheimportantprojectsinChina’sNationalHigh-TechProgramm.ScientistsinTribleJCorp.startedtheresearchlastyear.Afternearlyoneyear’sarduouswork,theycom-pletedthelabworkontheprojectandcametothe
简介:TheNi-AlalloycontainingCr,FeadditiveswerepreparedasRaneyNiCatalystbyhighenergymilling.ThesizeandsurfacestateofNi-Alalloypowderwerestudiedbyparticlesizeanalyzerandsanningelectronmicroscopy.theStructurewasanalyzedbyXRDandMoessbauermethods.Theresultsshowedthatafterahigh-energymilling(HEM).theNi-Alalloytransformstoanano-scaleNiAlstructurewithrichAl.Byannealingthealloy,ametastableNi2Al3phasecanbeobtained.
简介:1IntroductionThenickelaloysandcomplexesarewidelyusedasmagnetic,optical,nuclearandsuperconductingmaterials[1,2].Manynickelcom...
简介:1IntroductionNorfloxacinbelongstothecompoundoftheseriesofcarbostyrilcontainingfluorine.Itisabroadspectrumantimicrobial,and...
简介:PrecipitationstudywascarriedoutinNi-35at.pctCralloybymeasuringelectricalresistivityatdifferentageingtemperaturesandlongageingtimes.Duringageing,itwasobservedthatelectricalresistivityinitiallyrosewithageingtimeandthenfellafterverylongageingataconstanttemperature.TheinitialincreaseinresistivityduringageingmaybeattributedtotheformationofGPzones/Cr-richprecipitatesatearlystagesbynucleationprocessanddecreaseinresistivity,andafterattainingamaximum,isduetothegrowthofprecipitateparticlesandsubsequentlybycoarseningoftheseprecipitates.TheresultsofelectricalresistivitymeasurementsduringageingwereconfirmedbyX-raydiffractionanalysisindicatingtheformationofaCr-richphaseandaCr3Ni2phaseintheNimatrix.
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简介:DensityofmoltenNiandNi-Walloyswasmeasuredinthetemperaturerangeof1773~1873Kwithasessiledropmethod.ThedensityofmoltenNiandNi-Walloystrendstodecreasewithincreasingtemperature.ThedensityandmolarvolumeofthealloystrendtoincreasewithincreasingWconcentrationinthealloys.ThecalculationresultshowsanidealmixingofNi-Walloys.
简介:ToseparatethecadmiumandnickelresourcesinwasteNi-Cdbatteries,aself-designedvacuumdistillationrecyclingsystemwasstudiedunderlaboratoryconditions.Theeffectsofsystemtemperature,operatingpressure,andtimeontheseparationofNiandCdwerestudiedrespectively.Themechanismofvacuumthermalrecyclingwasalsodiscussed.ResultsshowthatvacuumdistillationisaveryeffectiveseparationmethodforwasteNi-Cdbatteries.AtaConstantpressure,theincreaseoftemperaturecanimprovetheseparatingefficiencyofCd.Whenthetemperatureis1173K,Cadmiumcanevaporatecompletelyfromthesamplesduring3hat10Pa,ThereductionofpressureinacertainrangeiseffectivetotheseparatingofCdfromNi-Cdbatteriesbyvacuumdistillation.
简介:HomogeneousNi2+-dopedtitaniagelwassynthesizedbyasol-gelprocess,andthexerogelwasthenobtainedthroughaginganddrying,leadingtotheformationofNi/TiO2nanocompositeafterheattreatmentunderasuitablereducingatmosphere.TheresultingnanocompositewascharacterizedbyTGA-DSC,TEM,XRDandBETmethods.Theresultsshowthatthestructureandgrainsizeofthenanocompositescouldbemanipulatedbyalteringtheheat-treatmentconditions,andthatthenanocompositepossessesamesoporousstructurewithaporeradiusofca.28nmandaspecifictheanatase-rutilephasetransformation.
简介:ThesecondaryhardeningreactionisaccompaniedwithprecipitationoffinecarbidesinhighCoNiultrahighstrengthsteel.Thecrystalstructureoftheprecipitatingcarbidesisunambiguouslydeterminedbymicrobeamdiffractionintransmissionelectronmicroscopy.Itisidentifiedthattheneedle-shapedcarbidesareM2Cwithahexagonalstructure.TheconcentrationofsubstitutionalalloyingelementsinthecarbidesquantifiedbyenergydispersiveX-rayspectroscopy(EDS)alsosupportstheresultabove.ThespatialstructureofM2CisidenticalwithL'3type.Metalatomsareinaclosepackedhexagonalstructure,thecarbonatomspartlydistributewithrandomintheoctahedralintersticesandthefillingprobabilityislessthan1/2.Particularattentionwaspaidtotherelationshipofneedle-shapedcarbides/ferritematrixatsecondaryhardeningpeaktemperedat482℃for5h.Observationbyhighresolutiontransmissionelectronmicroscopy(HRTEM)confirmsthatcarbideswithblack-whitecontrastarefullycoherentwithferriteandhaveindividualcrystalstructure,andthecoarsenedcarbideswithmoirefringearepartiallycoherentwithmatrix.TheorientationrelationshipbetweenM2CandferritematrixisdirectlyobservedandidentifiedwiththewellestablishedP-Srelationship[001]α//[111]c.
简介:通过前处理,在聚甲基丙烯酸甲酯微球表面形成活性中心,采用化学液相沉积法.在微球表面沉积镍合金层,制成了单分散PMMA/Ni复合粒子,采用XPS、XRD、SEM、比表面分析仪、微米激光粒度分布仪等多种分析测试方法对制得的复合粒子的结构及性能进行表征,结果表明:制备的复合粒子大小约10μm,呈单分散性,分散度在0.025左右,包覆层呈较好的球形,结构致密,形状规则,具有一点的柔软度,合金层大约在0.5μm,主要成分为含高磷的镍磷合金。