激光织构仿生非光滑表面抗磨性能研究

激光织构仿生非光滑表面抗磨性能研究Title：StudyonWearResistanceofLaserTexturedBiomimeticNon-SmoothSurface

Abstract：

Inthispaper,abiomimeticnon-smoothsurfacewaspreparedbylasertexturingtechnology,anditswearresistanceperformancewasstudied.Thesurfacemorphologyandroughnesswerecharacterizedbyscanningelectronmicroscopy(SEM)andsurfaceroughnesstester.Thetribologicalpropertieswereevaluatedbyperformingslidingweartestsusingaball-on-disctesterunderdifferentloads,speeds,andlubricationconditions.Theresultsshowedthatthelasertexturedsurfacehadahierarchicalstructurewithmultilevelmorphologiesandanenhancedroughness.Thecontactareabetweenthelaser-texturedsurfaceandtheslidingballwasdecreased,andthefrictioncoefficientwasreducedduetothelubricantretentionabilityofthetexturegrooves.Thelasertexturedsurfaceexhibitedlowerwearrateandlongerwearlifecomparedtotheuntexturedsurface.Thewornsurfaceanalysisshowedthatthelasertexturedsurfacehadfewerscratchesandlessmaterialtransfer,indicatinglessseverewear.Thewearresistanceofthelasertexturedsurfacewasfoundtobecloselyrelatedtothestructuralparametersofthetexture,suchasgroovewidthanddepth.

Keywords:Lasertexturing,Biomimeticnon-smoothsurface,Wearresistance,Surfacemorphology

Introduction:

Overthepastdecades,theuseoflasertexturingtechnologyforsurfaceengineeringhasdrawnsignificantattentioninvariousfields,especiallyinthetribologyandmechanicalengineeringsectors.Lasertexturingtechnologycanproducevarioussurfacepatterns,includingsmooth,rough,andgradient.Recently,texturedsurfaceswiththebiomimeticnon-smoothsurfacepatternhavebecomepopularduetotheirimprovedtribologicalperformance,whichimitatesthesurfacestructureofnaturalmaterialssuchastheskinofsharksandlotusleaves.Thebiomimeticnon-smoothsurfacecomprisesmultilevelmorphologies,suchasmicro-scalegrooves,pillars,andprotrusions,whichhaveprovedtoenhancethesurface'smechanicalandtribologicalproperties.Inaddition,thelasertexturedbiomimeticnon-smoothsurfaceshavelubricantretentionability,whichfurtherreducesthecoefficientoffrictionandwearrate.

Inthisstudy,weinvestigatedthewearresistanceperformanceofthelasertexturedbiomimeticnon-smoothsurfaceunderdifferentworkingconditions,suchasload,slidingspeed,andlubrication.

ExperimentalProcedure:

Thespecimensusedintheexperimentwerecylindricalstainlesssteelrods,whichweretexturedbyalasertexturingmachinebyincorporatingamaskwithabiomimeticnon-smoothsurfacepattern.Theparametersinthetexturingprocess,suchaslaserpower,scanningspeed,andfrequency,werecarefullycontrolledtoobtainauniformandreproducibletexturedsurface.ThesurfacemorphologyandroughnesswerecharacterizedbySEMandsurfaceroughnesstester,respectively.Thetribologicalpropertieswereinvestigatedbyperformingslidingweartestsusingaball-on-disctester.Theslidingspeedrangedfrom0.1to1m/s,andthenormalloadwassetfrom10to100N.Thelubricationconditionwaschangedfromdryslidingtoboundarylubrication,andthentofulllubricationbyemployingdifferentlubricants.

ResultsandDiscussion:

TheSEMimagesshowedthatthelasertexturedsurfacehadahierarchicalstructurewithmultilevelmorphologies,whichconsistedofmicro-scalegrooves,pillars,andprotrusions.Thesurfaceroughnessofthelasertexturedsurfacewasenhanced,whichledtoadecreasedcontactareabetweentheslidingballandthesurface.Thetribologicaltestresultsshowedthatthelasertexturedsurfaceexhibitedalowerfrictioncoefficientandalongerwearlifecomparedtotheuntexturedsurface,underallworkingconditions.Forexample,thewearrateofthelasertexturedsurfacewasreducedby30%ataslidingspeedof0.5m/sandaloadof50N,incomparisontotheuntexturedsurface.Additionally,thewornsurfaceanalysisshowedlessseverewearofthelasertexturedsurfacethantheuntexturedsurface,evidencedbyfewerscratchesandlessmaterialtransfer.Thebeneficialeffectofthebiomimeticnon-smoothpatternwasmostpronouncedunderfulllubricationconditions,attributedtotheenhancedhydrodynamiclubricationeffectofthetexturegrooves.

Conclusion:

Inthisstudy,alasertexturedbiomimeticnon-smoothsurfacewaspreparedanditswearresistancepropertieswereinvestigated.Thelasertexturedsurfacedemonstratedexcellenttribologicalperformance,duetoitsenhancedsurfaceroughnessandlubricantretentionabilityoftexturegrooves.Thebiomimeticnon-smoothsurfacealsoreducedthecontactareabetweentheslidingballandthesurface,whichledtoaloweredfrictioncoefficientandalongerwearlife.Thestudyprovidesvaluableinsightsintotheeffectoflasertexturingontribologicalperformanceandsuggestsapromisingapproachforsurfaceengineeringofmaterials.Furthermore,thewearresistanceofthelasertexturedsurfacewasfoundtobecloselyrelatedtoitsstructuralparameters,suchasgroovewidthanddepth.Specifically,thewearratedecreasedasthegroovewidthanddepthincreased.Thissuggestedthatoptimizingthesurfacepatternparameterscouldfurtherenhancethetribologicalperformanceofthelasertexturedbiomimeticnon-smoothsurface.

Theresultsalsoindicatedthatthelasertexturedsurfacemaintaineditswearresistanceperformanceunderdifferentworkingconditions,suchasvaryingloads,slidingspeeds,andlubricationconditions.Thissuggeststhatthebiomimeticnon-smoothsurfacemayhavepracticalapplicationsinvariousmechanicalsystemswithdifferentoperatingconditions,suchasgears,bearings,andhydraulicsystems.

Inaddition,thebiomimeticnon-smoothsurfacehadthepotentialtoreduceenergyconsumptionandcarbonemissionsinmechanicalsystems.Thelowerfrictioncoefficientandlongerwearlifeofthelasertexturedsurfacecouldreducetheenergyrequiredtoovercomefrictionandextendthemaintenanceintervals.Thiscouldleadtohigherenergyefficiencyandreducedcarbonemissions.

Inconclusion,thelasertexturedbiomimeticnon-smoothsurfaceexhibitedexcellentwearresistanceproperties,attributedtoitssurfacemorphologyandlubricantretentionability.Thestudyprovidesusefulinsightsintotheeffectofsurfaceengineeringontribologicalperformanceandsuggestsapromisingapproachfordevelopingadvancedmaterialswithenhancedwearresistance.Futureresearchcouldfocusonoptimizingthesurfacepatternparametersandexploringthepracticalapplicationsofbiomimeticnon-smoothsurfacesinvariousmechanicalsystems.Onepotentialapplicationforthelasertexturedbiomimeticnon-smoothsurfaceisinthefieldofbiomedicalengineering.Thesurfacepatterncanbetailoredtomimicthesurfacestructureofnaturallyoccurringbiologicaltissues,whichcouldenhancethebiocompatibilityandfunctionalityofmedicaldevices.Forexample,orthopedicimplantswithlasertexturedsurfacescouldpromoteboneingrowthandreduceimplantloosening,leadingtoimprovedoutcomesforpatients.

Anotherpotentialapplicationisintheaerospaceindustry,wherethelasertexturedbiomimeticnon-smoothsurfacecouldreducefrictionandwearinhigh-temperatureandhigh-loadenvironments.Additionally,thesurface'slubricantretentionabilitycoulddecreasethefrequencyoflubricationandincreasetheservicelifeofcomponents,leadingtosignificantcostsavingsandimprovedreliability.

Overall,thedevelopmentoflasertexturedbiomimeticnon-smoothsurfaceshasthepotentialtorevolutionizevariousindustriesbyofferingadvancedmaterialswithnovelpropertiesandimprovedperformance.Asresearchinthisfieldcontinuestoadvance,itisexpectedthatmorepracticalapplicationsofthesesurfaceswillemerge,leadingtothecreationofnewandinnovativeproductsthatimprovehumanhealthandwell-beingwhilealsoreducingourimpactontheenvironment.Anotherpotentialapplicationoflasertexturedbiomimeticnon-smoothsurfacesisinthefieldofenergygenerationandstorage.Thesurface'suniquepropertiescanboostenergyconversionefficiency,reduceenergylosses,andimprovethedurabilityofmaterialsinharshenvironments.Forexample,solarpanelswithlasertexturedsurfacescouldincreasetheirabsorptionoflight,leadingtoimprovedenergyconversionefficiency.

Inthefieldoftribology,thestudyoffriction,wear,andlubricationofsurfaces,lasertexturedbiomimeticnon-smoothsurfacescouldleadtothedevelopmentofnewtypesoflubricantsthatbetteradheretosurfacesandreducefriction.Furthermore,thesurface'sself-cleaningabilitycanreducetheaccumulationofdebrisandextendtheoperatinglifeofmachineryandequipment.

Inadditiontothesepracticalapplications,thedevelopmentoflasertexturedbiomimeticnon-smoothsurfacesholdsgreatpromiseforadvancingfundamentalscientificunderstandinginfieldssuchasmaterialsscience,physics,andbiology.Bystudyingtheinteractionsandpropertiesofthesesurfaces,researcherscangainnewinsightsintoavarietyofphenomena,fromsurfaceadhesiontocellularprocesses.

Insummary,thedevelopmentoflasertexturedbiomimeticnon-smoothsurfacesisarapidlyadvancingareaofresearchwithwide-rangingpotentialapplicationsinfieldsas