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等离子喷涂制备镍基自润滑复合涂层的研究.docx

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等离子喷涂制备镍基自润滑复合涂层的研究 Title:ResearchonthePreparationofNickel-BasedSelf-LubricatingCompositeCoatingsbyPlasmaSpraying Abstract Nickel-basedself-lubricatingcompositecoatingshavegainedsignificantattentionduetotheirexcellentwearresistanceandself-lubricatingproperties.Thispaperinvestigatesthepreparationofsuchcoatingsusingplasmasprayingtechnology.Byanalyzingtheprocessparameters,coatingmicrostructure,andtribologicalproperties,theaimistoprovidevaluableinsightsintothedevelopmentandapplicationofnickel-basedself-lubricatingcompositecoatings. 1.Introduction Nickel-basedself-lubricatingcompositecoatingshavebeenextensivelystudiedfortheirpotentialinvariousindustrialapplications.Theincorporationofsolidlubricantparticlesintoanickelmatrixcansignificantlyenhancethewearresistanceandself-lubricatingpropertiesofthecoating.Traditionalpreparationmethods,suchaselectroplatingandphysicalvapordeposition,havelimitationsintermsofcost,coatingthickness,andprocesscomplexity.Plasmaspraying,asaversatileandscalabletechnology,offersapromisingsolutionforthefabricationofnickel-basedself-lubricatingcompositecoatings. 2.ExperimentalProcedure 2.1MaterialPreparation Thenickel-basedpowderwithappropriateparticlesizeandcompositionismixedwithsolidlubricantparticles,suchasgraphite,molybdenumdisulfide,orpolytetrafluoroethylene.Themixtureisthenhomogenizedusingmechanicalblendingtechniquestoensureauniformdistributionofthesolidlubricantparticleswithinthenickelmatrix. 2.2PlasmaSprayingProcess Thepreparedpowdermixtureissprayedontothesubstrateusingaplasmasprayingsystem.Theprocessparameters,includingplasmagasflowrate,powderfeedrate,andsprayingdistance,areoptimizedtoachieveadenseanduniformcoating.Additionally,theeffectofdifferentplasmasprayingtechniques,suchasatmosphericplasmaspraying(APS)andvacuumplasmaspraying(VPS),onthecoatingpropertiesisinvestigated. 3.CharacterizationandAnalysis 3.1MicrostructuralAnalysis Themicrostructureofthesprayedcoatingisanalyzedusingtechniquessuchasscanningelectronmicroscopy(SEM)andX-raydiffraction