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简介:Layeredcathodematerialsofhigh-temperaturelithiumbatteries,LiNi1/3Mn1/3Co1/3O2aresynthesizedbyasol-gelmethodwithvariationinfinalsinteringtemperatureforboreholeapplications.Thestructure,morphologyandhigh-temperaturedischargeperformanceoftheseresultingproductsareinvestigatedbyX-RayDiffraction(XRD),scanningelectronmicroscopy(SEM),laserparticlesizeanalysis,galvanostaticandpulsedischarge.Theresultsofstructuralanalysisindicatethatthesamplesinteredat800℃hasthecharacteristicsofgoodcrystallinity,narrowsizedistributionandlargespecificsurfaceareaatthesametime.Thedischargeexperimentsalsoindicatethatthissamplehasthebestelectrochemicalproperties,withthemaximumdischargecapacitiesof314.57and434.14mAh·g-1at200and300℃respectivelyandtheminimumcellinternalresistancesatbothtemperatures.
简介:Deformation-inducedmicrostructuresofhigh-Mnaustenitesteelwasinvestigatedbymetallography,X-raydiffractionandSEM.Theε-martensiteandslip-bandsaredeformation-in-ducedonthe{111}planes,andappearasthinstraightlathswith60~80°alignmentdifferencebe-tweenthem.Itwasfoundthatε-martensiteandslipbandsarekinkedatfcctwinboundarieswiththekinkedangle35~40°.Thebandsofequilateraltriangleinthemicrostructureoftensiledeformationarepresented.
简介:二种Mn-Si-Mo低碳钢被设计在热卷的低碳bainitic的微观结构和性质上学习Mn的效果钢。到生产花费了的还原剂,0.13%的一个很低的瞬间内容两个都被加在一起钢。在热滚动以后,样品的机械性质被测试。微观结构被光显微镜和传播电子显微镜观察并且分析。结果证明测试的钢的力量随Mn的增加增加内容,当延伸减少时。当Mn内容增加时,bainite微观结构增加。结果能为作文提供一个理论基础设计和低费用的工业生产低碳bainitic钢。
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简介:Na5+xYAlxSi4-xO12superionicconductorsarerhombohedralR3cspacegroup.Theirstructuresarecharacterizedby(Alx/4Si1-x/4)O4tetrahedralinkedtoformpuckered(Al3xSi4-x)4O35ringsparalleltothebasalplaneofthehexagonalcell.Theserings,separatedbypartsofsodiumoxygenpolyhedron,arestackedtoformlargerigidcolumsparalleltocaxis.Thecolumnsarelinkedby[YO6]octahedratoformathree-dimensionalFrameworkwithlargechannelsbetweentherings.PartsofNaionslocatedinthecoresofthecolumnsaremovable.Intermsoftheconductionmechanism,theconcentrationofconductingNa+ionswascarriedoutandcomparedwiththeexperimentalresults.Itwasfoundthatthetheoreticalvaluesaccordwiththeexperimentalresults.
简介:Mn-Zn铁酸盐(Mn1−xZnxFe2有不同作文的O4)被象pH的如此的合成条件的一起沉淀方法,和影响准备价值,混合答案和NH4他们的微观结构和磁性上的HCO3答案被讨论。样品被X光检查衍射(XRD)和磁化测量仪器描绘。格子参数和综合材料的平均水晶的尺寸与相关软件Jade.5从相应XRD模式被计算。为不同pH价值的样品,当pH价值是7.0,8.0和9.0时,仅仅一个阶段被发现。有7.0的pH价值的样品展出了最高的浸透磁性的正式就职,最低强制力量,和使结晶的最好。为有7.0的pH价值的不同R价值的样品,仅仅一个阶段与R在所有样品,和样品被观察2.3的价值展出了最高的浸透磁性的正式就职和最低强制力量。作文主要有afected磁性的正式就职随Zn(x)的内容的增加增加,但是当x超过0.6时,减少的磁性,和浸透。强制力量的趋势相反是。然而,当x价值直到0.8时,没有磁力被展出。
简介:在在参考书在中等Mn钢上总结相关研究以后,张力的性质上的二个新目标被定义。一个人两个都是那导致转变(旅行)并且导致双胞胎的粘性(缇)能与一个相对低的Mn内容为钢被认识到,它与更高的Mn内容展出类似的张力的性质到古典缇钢。其它将完成超离频的最终的张力的力量(>1.5?GPa)没有牺牲formability。达到这些目标,新设计策略为作文和处理线路被提出。特别地,因为前者能经由部分再结晶与不同形态学和尺寸生产保留的奥氏体谷物的混合物,温暖的滚动被采用而不是平常的热/冷的滚动过程。因而,保留的奥氏体谷物有大量技工稳定性以便他们能在变丑期间逐渐地转变到马氏体,导致提高的旅行效果然后改进技工性质。最后,它在在实验室生产这些指向的中等Mn钢被接替,他们中的一些甚至比我们的期望展出更好张力的性质。
简介:TheX-raydiffractionpeak-shiftmethodwasintroducedintothedeterminationofdeformationfaultprobability(α)ofFe-Mn-SialloyswithvariousMncontentsandthermomechanicalcyclingnumbers.Thepreciselatticeconstantsrequiredwereobtainedbynumericalcalculationinsteadofusingstandardsamplewithoutanyfault.Theinfluenceofinternalstressonthedeterminedαhasbeenevaluated,andthecausedrelativeerrorwasdeterminedasabout4%andthusnegligible.TheresultsshowthatthedeformationfaultprobabilityincreaseswithdecreasingMn-contentandincreasingcyclenumber,whicharequalitativelyconsistentwiththoseresultsofPsfdeterminedbypeak-broadeningmethod.
简介:Themicrostructuralfeatures,shapememorybehaviorandmechanicalpropertiesofNi-Mnbasedalloyswereinvestigatedbydierentialscanningcalorimetry(DSC),scanningelectronmicroscopy(SEM),transmissionelectronmicroscopy(TEM)andthermalcyclingtestundervariousstresses.ThetransformationtemperaturesshiftedtowardlowertemperatureswhenaddingathirdelementintotheNi-Mnsystem.Theadditionof10at.pctFeincreasedconsiderablythemechanicalpropertiesexhibitingstillhightransformationtemperatures.However,itwasfoundthatinNiMn40Fe10alloythemartensitictransformationisnotthermoelasticinnature.ThemechanismofthistransformationandthecrystallographyofNi-Mn(50-x)-Fex(x=5,7,10,20at.pct)alloysarepresented.
简介:ThemechanismoftheinterfacialreactionofAl2O3/mediumMnsteelcontainingNbwasstudiedbymeansoftheobservationontheinterfacialreactionphenomenonofAl2O3/mediumMnsteel,andtheanalysesontheinterracialphases.TheresultsshowthatwhenT≥1550℃,theinterfacialreac-tionofAl2O3/mediumMnsteelcontainingNbhappened.InthemediumMnsteelmatrix,NbexistsintheformofNbC.NbCarethenucleatingbaseofCOgasbubbles.
简介:CellularspacingselectionofCu-27.3wtpctMnalloyhasbeeninvestigatedbylasersurfacerapidresolidificationexperiments.Theexperimentalresultsshowthatthereexistsawidedistributionrangeincellularspacingunderultra-hightemperaturegradientandrapidsolidificationconditionsandtheaveragespacingdecreasewithincreaseofthegrowthrate.TheexperimentalresultsarecomparedwiththecurrentKGTmodelforrapidcellular/dendriticgrowth,andareasonableagreementisfound.
简介:用气泡液膜法连续式工艺,将MnC12·4H2O、ZnCl2和FeCl3·6H2O的混合水溶液与NaOH水溶液进行反应,制得了Mn0.25Zn0.23Fe1.04O2.04前体纳米粒子。这种前体经240℃、300℃、400℃、500℃、600℃、700℃和800℃烧结后,制得Mn0.25Zn0.23Fe1.04O2.04铁氧体纳米粒子。进行了XRD、VSM、SEM、TEM、FTIR和元素分析等测定,结果表明,全部烧结产品晶粒的粒径均在25nm以下;在240℃-700℃烧结产物的仃。在40.69-46.02emu/g;400℃及其以下温度烧结产品的Hc≈0;600℃烧结产品的Tc为458.1℃。测定了600℃烧结产品的SEM,以及240℃烧结产品的TEM。
简介:InvestigationhasbeencarriedouttofindtheeffectsofNdsubstitutionandCuadditiononthehydrogenstoragepropertiesofAB5-typealloywithamulticomponentLa0.6M0.4Ni4.8Mn0.2(M=Y,Nd)system.La0.6Y0.4Ni4.8Mn0.2,whichwasusedinanair-conditioningsystem,showedpoorhysteresisandslopingcharacteristics,whichledtoadecreaseconcerningthecoefficientofperformanceofthesystem.BythesubstitutionofNdforY,thehydrogenstoragecapacityincreased,andtheplateaupressuredecreasedalittle,butthehydrogenabsorptionkineticsdecreaseddramatically.CuadditioncaneffectivelyimprovethekineticsofhydrideformationwithoutchangingthehydrogenstoragecapacityofLa0.6Nd0.4Ni4.8Mn0.2.IthasbeenfoundthatLa0.6Nd0.4Ni4.8Mn0.2Cu0.1alloyshowedgoodhydrogenstoragecharacteristicsformetalhydrideair-conditioningsystem.Theresultsshowedthat,foreachcomponentofLa0.6Mo.4Ni4.8Mn0.2,theeffectivehydrogenstoragecapacityincreasedwithdecreaseoftheunitcellparameterc/aandthehydrogenabsorptionplateaupressureincreasedwithdecreaseoftheparametera.