Electrodeposition and characterization of nano-structured Ni–SiC composite films.pdf

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1、Surface&CoatingsTechnology205(2011)3448–3454ContentslistsavailableatScienceDirectSurface&CoatingsTechnologyjournalhomepage:www.elsevier.com/locate/surfcoatElectrodepositionandcharacterizationofnano-structuredNi–SiCcompositefilmsa,bb,ccbb,dbab,⁎C.Cai,X.B.Zhu,G.Q.Zheng,Y.N.Yuan,X.Q.Huang,F.

2、H.Cao,J.F.Yang,Z.ZhangaStateKeyLaboratoryforMechanicalBehaviorofMaterials,Xi'anJiaotongUniversity,Xi'an710049,PRChinabDepartmentofChemistry,YuquanCampus,ZhejiangUniversity,Hangzhou310027,PRChinacCollegeofChemicalEngineeringandMaterialScience,ZhejiangUniversityofTechnology,Hangzhou310014,

3、PRChinadWuhanIron&SteelCorp.,Wuhan410080,PRChinaarticleinfoabstractArticlehistory:Ni–SiCnano-compositecoating,whichsimultaneouslycomposedofbothnanocrystallineconsecutiveNimatrixReceived3November2009anddispersedinertSiCnano-particles,hasbeenfabricatedbyultrasonicelectroplatingtechniquefro

4、maAcceptedinrevisedform1December2010modifiedWattsbathcontainingSiCnano-particles.TheinfluenceofmechanicalstirringandultrasonicationonAvailableonline9December2010thesurfacemorphologyofthenanocrystallineNi–SiCnano-compositefilmhasalsobeeninvestigated.Thesurfacemorphology,microstructure,anti-c

5、orrosionpropertyandelectrocatalyticactivityforhydrogenevolutionKeywords:oftheobtainednanocrystallineNi–SiCnano-compositefilm,arecharacterizedusingscanningelectronNi–SiCnano-compositefilmEletrodepositionmicroscopy(SEM)coupledwithenergydispersivespectroscopy(EDS)system,atomicforcemicroscopy(

6、AFM),Corrosionresistancetransmissionelectronmicroscope(TEM),X-raydiffraction(XRD)andelectrochemicalimpedancespectroscopyHydrogenevolution(EIS)techniques.Theresultsfindthat,mechanicalstirringmainlypreventsthesedimentationoftheinertparticlessuspendedinsolutions,whileultrasonicationmainlypre

7、ventstheparticlesagglomeration.InthecaseofonlymechanicalstirringtodispersetheSiCnano-particles,thecompositesurfaceiscaulifloweralike.Whileinthecaseofbothmechanicalstirringandultrasonication,theobtainedNi–SiCcompositefilmismuchsmootherandcomposesofparticleswiththemeandiamete