简介:Inthisstudy,tungsten(W)wascoatedonacopper(Cu)substratebyusingdouble-glowdischargetechniqueusingapureWpanelasthetargetandargon(Ar)asthedischargeandsputteringgas.ThecrystalstructureoftheWcoatingwasexaminedbyX-raydiffraction(XRD).Scanningelectronmicroscopy(SEM)wasperformedwithcross-sectionimagestoinvestigatethepenetrationdepthofWintotheCubody.Additionally,thepropertiesofwearabilityresistance,corrosionresistanceandmechanicalstrengthoftheWcoatedCumatrixwerealsomeasured.Itisconcludedthatindouble-glowplasma,WcoatedCucanbefacilelyprepared.ItisnoticedthatthetreatmenttemperatureheavilydominatesthepropertiesoftheW-Cucomposite.
简介:有优秀的反的涂层和免职过程穿并且对工业申请合适被开发,并且最佳洗澡作文和进程被在免职率和plating解决方案稳定性上学习洗澡作文,温度和pH价值的影响获得。而且,润滑添加剂和无电的扔的Ni-W-P涂层以及他们的synergistic效果的nano-Cu的tribological性质用测试机器和精力的戒指块磨损被研究散分光计。研究结果证明那Ni-W-P合金涂层和nano-Cu润滑添加剂有优秀synergistic效果,eg,Ni-W-P合金涂层的wear抵抗(与有nano-Cu添加剂的热处理和油)增加了乘的百比是的45钢有基本的油的金属底层,并且零穿被完成,它突破以前的分开的研究的瓶颈上述二个方面。
简介:TheroleoftemperatureontheoxidationdynamicsofCu2OonZnO(0001)wasinvestigatedduringtheoxidationofCu(111)/ZnO(0001)byusingoxygenplasmaastheoxidant.AtransitionfromsinglecrystallineCu2O(111)orientationtomicro-zonephaseseparationwithmultipleorientationswasrevealedwhentheoxidationtemperatureincreasedabove300°C.TheexperimentalresultsclearlyshowtheeffectoftheoxidationtemperaturewiththeassistanceofoxygenplasmaonchangingthemorphologyofCu(111)filmandenhancingthelateralnucleationandmigrationabilitiesofcuprousoxides.Averticaltop-downoxidationmodeandalateralmigrationmodelwereproposedtoexplainthedifferentnucleationandgrowthdynamicsofthetemperature-dependentoxidationprocessintheoxidationofCu(111)/ZnO(0001).
简介:为了庆祝Focal发展的重要里程碑,原厂推出了Chorus826W30周年限量纪念版本,Chorus826W延续既有Chorus的造型,但细节更为精进,可说是AMG版本的Chorus。铝镁合金内凹式TNV高音单元安装在铝合金框架上,高频延伸直上28kHz。
简介:Ahighlyreliableinterfaceofself-alignedbarrierCuSiNthinlayerbetweentheCufilmandthenano-porousSiC:H(p-SiC:H)cappingbarrier(k=3.3)hasbeendevelopedinthepresentwork.Withtheintroductionofself-alignedbarrier(SAB)CuSiNbetweenaCufilmandap-SiC:Hcappingbarrier,theinterfacialthermalstabilityandtheadhesionoftheCu/p-SiC:Hfilmareconsiderablyenhanced.AsignificantimprovementofadhesionstrengthandthermalstabilityofCu/p-SiC:H/SiOC:Hfilmstackhasbeenachievedbyoptimizingthepre-cleanstepbeforecap-layerdepositionandbyformingtheCuSiN-likephase.ThiscaplayeronthesurfaceoftheCucanprovideamorecohesiveinterfaceandeffectivelysuppressCuatommigrationaswell.
简介:ApreliminarystudywasmadeontheantibacterialbehaviorofanewlydesignedCu-bearingtype200stainlesssteelbydifferentmethodsincludingVickershardnessmeasurement,electrochemicaltestandantibacterialtest.TheresultsshowedthatCu-richprecipitationscausedbythesaturatedCuinthesteelmatrixwasnotonlyacrucialfactorforitsexcellentantibacterialcapability,butalsoforitsequivalentcorrosionresistanceasgoodasthecommercialtype200stainlesssteel.
简介:Cu-andCo-substitutedNiZnferritethinfilms,Ni0.4-xZn0.6CuxFe2O4andNi0.5Zn0.5CoxFe2-xO4(0≤x≤0.2),aresynthesizedbysol-gelprocess.ThecrystallographicandmagneticpropertiesofCu-andCo-substitutedNiZnferritethinfilmshavebeeninvestigated.ThelatticeparameterdecreaseswithCusubstitutionandincreaseswithCosubstitution.ThesaturationmagnetizationdecreasesandthecoercivityincreaseswiththeincreaseofCusubstitution.Moreover,thesaturationmagnetizationgraduallyincreaseswiththeincreaseofCosubstitutionwhenx≤0.10,butdecreaseswhenx>0.10.Meanwhile,thecoercivityinitiallydecreaseswiththeincreaseofCosubstitutionwhenx≤0.10,butincreaseswhenx>0.10.
简介:At-hyperwheel(t≥3)oflengthl(orW(t)lforbrevity)isat-uniformhypergraph(V,E),whereE={e1,e2,...,el}andv1,v2,...,vlaredistinctverticesofV=∪eii=1lsuchthatfori=1,...,l,vi,vi+1∈eiandei∩ej=P,j∈/{i1,i,i+1},wheretheoperationonthesubscriptsismodulolandPisavertexofVwhichisdifferentfromvi,1≤i≤l.Inthispaper,theminimumcoveringproblemofMCλ(3,W(3)4,v)isinvestigated.DirectandrecursiveconstructionsonMCλ(3,W(3)4,v)arepresented.Thecoveringnumbercλ(3,W(3)4,v)isfinallydeterminedforanypositiveintegersv≥5andλ.
简介:ThetreatmentoftheGacuncomplexCu-PbbulkconcentratewithhighZn,Ag,etc.,byoxygenpressureacidleachingwasstudied.Theprimarycopperandleadmineralsintheconcentratearetetrahedriteandgalena.Thetreatmentoftetrahedritewasrarelystudied,andmostofsilveroccurredinthemineraltoo.Theoptimumoperatingparametersofoxygenpressureacidleachingwereestablishedbyconditionaltests.Undertheseparameters,theresultofpilotscaletestshowedthattheleachingpercentagesofcopperandzincwereseparatelyashighas98.9wt.%and94.9wt.%,whileleadandsilverweretransformedintosulfateandsulfideprecipitations,respectively.Thecopperandzincinlixiviumwerereclaimedbyextraction-electrowinningandpurification-electrowinning,respectively,andtheleadandsilverintheresiduewerereclaimedseparatelybycarbonatetransformation-silicofluoricacidleachingandthiourealeaching.
简介:Chemicalvapordeposition-tungsten(CVD-W)coatingcoveringthesurfaceoftheplasmafacingcomponent(PFC)isaneffectivemethodtoimplementthetungstenmaterialasplasmafacingmaterial(PFM)infusiondevices.ResidualthermalstressinCVD-Wcoatingduetothermalmismatchbetweencoatingandsubstratewassuccessfullysimulatedbyusingafiniteelementmethod(ANSYS10.0code).Thedepositionparametriceffects,i.e.,coatingthicknessanddepositiontemperature,andinterlayerwereinvestigatedtogetadescriptionoftheresidualthermalstressintheCVD-Wcoating-substratesystem.AndtheinfluenceofthesubstratematerialsonthegenerationofresidualthermalstressintheCVD-WcoatingwasanalyzedwithrespecttotheCVD-WcoatingapplicationasPFM.ThisanalysisisbeneficialforthepreparationandapplicationofCVD-Wcoating.
简介:W.H.奥登作为对穆旦、杜运燮等西南联大诗人有重要影响的英国诗人,其对于中国现代主义诗歌形成与发展的重要意义已然为学界认可,但奥登的诗歌除了“机智”、“俏皮”等特点为部分学者注意之外,其丰富的诗歌特质仍未得到充分关注。对于深入解读西南联大诗歌群体的文学创作活动而言,接近“真实”的奥登就显得至关重要。在那个特殊的历史情境中,威廉·燕卜荪的引介无疑是联大诗人们认识奥登的最初途径——燕卜荪对奥登的介绍,不仅仅让这些联大诗人们认识了英国现代主义诗歌,而且直接引发了西南联大现代主义诗歌的创作实践,使中国的现代主义诗歌纳入了世界现代主义文学创作的格局,并对中国当代的诗歌创作产生着重要影响。