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简介：ＣａｌｃｕｌａｔｉｏｎｏｆＢｕｌｋＭｏｄｕｌｉｏｆＣａｒｂｏｎＮｉｔｒｉｄｅ／ｍｅｔａｌＮｉｔｒｉｄｅＣｏｍｐｏｓｉｔｅｓＨｏｕＱｉｎｇｒｕｎａｎｄＧａｏＪｕ（侯清润）（高炬）ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓ，ＴｈｅＵｎｉｖｅｒｓｉｔｙｏｆＨｏ...

简介：Onthebasisoftheexperimentalworkofadhesion(W)data,theadhesionbetweentransitionmetalcar-bidesandpureliquidmetalswhichdonotreactwithcarbidesisstudied.Inviewofgreatscatteringoftheex-perimentalvaluesofW,acriticalanalysisoftheseresultsisperformed.TheselectedWvaluesfor9copper/carbidesystemsand6metal/TiCsystemsareusedtodiscussthevarioussuggestionsconcerningthemechanismofadhesionandtoevidencetheroleofthevalenceelectronsofthebothcarbideandmetalontheinteractionsbetweenmetalsandcarbides.Theinteractionsbetweenametalandacarbideareessentiallymetal-licinteractions,resultingfromtheoverlappingofthevalenceelectronsatthemetal/carbideinterface.

简介：Accordingtothespecificationofsuperalloy-stainlesssteelarcbrazingandcharacteristicofthebasemetal,abestfillermetalwhichhasrelativelowermeltingpoint,nicewettability,goodweldforming,andadequateshearstrengthwasresearched.TheexperimentresultsshowthatwettabilityofCuFeMnonthestainlesssteelisverypoor,concomitantwithamassofpurplesootduringtheweldingwhichdeterioratestheworkingcondition.CuSiMnhasthebestwettabilityonboththesuperalloyandstainlesssteel,butthereremainsalotofpitandslagonthesurfaceoftheweldbead.Copper-basedsolderhasthehighestmeltingpointanditswettabilityandclearancefillabilityareweakerthanCuSi3.WettabilityandclearancefillabilityoftheCuSi3arethebestinallthecandidatefillermetals,anditsweldissmoothnessandhashighershearstrength.Foritscomprehensiveability,CuSi3isselectedasthefinalfillermetal.

简介：Recoveryprocessesofsecondaryresourcesusuallyencounterproblemsbecauseofthediversecompositionsofwastes.Toenhancetheapplicabilityoftraditionalhydrometallurgicalprocesstowardsecondaryresources,theadjustmentofcomponentsisnecessary.Intraditionalhydrometallurgicalseparation,precipitationandcomplexationareextensivelyused.However,theircombinationasaspecificmetalseparationmethodhasnotyetbeenstudiedindetail.Thisapproachisverypromisingforsolvingproblemscausedbychangeablecomponentsduringrecyclingprocessesofsecondaryresources.Thispaperreviewstheeffectsofprecipitationandcomplexationinmetalseparationprocesses,andametalseparationmethodsystemof‘‘complexation–precipitation’’developedtoadjustthecomponentsofsecondaryresourcesisintroduced.

简介：金属涂的cenospheres广泛地在工业被使用了。不同涂层方法导致不同典型金属电影。由化学涂层的cenosphere上的金属电影不看起来很光滑，展出积累的金属和表面上的大头针洞并且离开某点uncoated。同时，金属电影紧没被吸收到cenospheres上并且是容易的开脱皮。然而，磁控管劈啪作响准备的金属电影是紧缩的，光滑并且在大头针洞外面。这部电影有好亲密关系到cenosphere表面。甚至当cenosphere被压碎时，如此的电影不用它分开。两个都，金属电影给一样的XRD模式，显示金属的水晶结构由这二个方法拍摄是一样。化学涂层是一个复杂过程并且有害环境，而是它适合极其细小的粉末涂层(粒子尺寸能是不到2)。磁控管劈啪作响的方法是环境的友好并且快速工作，但是这个方法要求特殊设计的设备并且不为极其细小的粉末工作。如果粒子尺寸是不到30，涂层过程是难的继续。

简介：Nb-bearingslagfromBaotouhotmetalwaschlorinatedinthesolidstatewithmoltenCaCl2undervacuum,96～98%MnOorFeObeingthusvolatilized.Byreducingthechloridizedresidueunderadditionofflux,ferroniobiumwithabout60%Nbwassuccessfullymade.KineticstudyofchlorinationofsyntheticMnO-Nb2O5-SiO2andFeO-Nb2O5-SiO2slagsystemswasconducted,andanon-reactingcoremodelforthedemanganificationwithfreeuseofactivitywasformulatedandtherate-controllingstepwasexplained.

简介：MoS_2,MoSe_2andWSe_2thinflakeswerefabricatedbythestandardmicromechanicalcleavageprocedures.ThethicknessandtheopticalcontrastoftheatomicthindichalcogenideflakesonSiO_2/Sisubstratesweremeasuredbyatomicforcemicroscopy(AFM)andspectroscopicellipsometer.Arapidandnondestructivemethodbyusingreflectionspectrawasproposedtoidentifythelayernumberof2DlayeredtransitionmetaldichalcogenidesonSiO_2(275nm)/Sisubstrates.Thecontrastspectraof2DnanosheetswithdifferentlayernumbersareinagreementwiththeoreticalcalculationsbasedonFresnel'slaw,indicatingthatthismethodprovidesanunambiguousandnondestructivecontrastspectrafingerprintforidentifyingsingle-andfew-layeredtransitionmetaldichalcogenides.Theresultswillgreatlyhelpinfundamentalresearchandapplication.

简介：虽然中铝、五矿对澳洲矿企的投一度遭遇波折，但这不能阻挡中资企业海外收购的步伐。澳洲中小型矿商MetallicaMinerals16日发布公告，称中国吉恩镍业（上海交易所代码：600432）的母公司吉林吴融有色金属集团，已通过场外交易的方式收购了该公司1400万股股票，正式成为公司的第一大股东。

简介：Bi3.15Nd0.85Ti3O12(BNT)粉末和薄电影被金属准备器官的分解(现代派)方法。BNT粉末的热流动曲线与调制温度被测量微分扫描热量计，和象热传导性系数和热散开系数那样的热物理参数从热流动曲线被获得。BNT薄电影的阶段鉴定，铁电体，和压电的性质在700点退火了