NiCr Cr3C2-BaF2？CaF2高溫自潤滑耐磨涂層的制備與摩擦磨損特性

NiCrCr3C2-BaF2？CaF2高溫自潤滑耐磨涂層的制備與摩擦磨損特性摘要

本文基于NiCrCr3C2-BaF2/CaF2自潤滑耐磨涂層的制備工藝，研究了涂層摩擦磨損特性。結(jié)果表明，在制備工藝中引入BaF2/CaF2自潤滑劑，制備的自潤滑耐磨涂層具有優(yōu)良的耐磨性能和低摩擦系數(shù)。磨損機理主要為表面磨粒剝落和接觸燒蝕，涂層的磨損機制與測試條件和材料性能有關(guān)。

關(guān)鍵詞：自潤滑耐磨涂層；BaF2/CaF2；摩擦磨損；磨損機理

Introduction

Inordertoimprovethewearresistanceandreducethefrictioncoefficientofmetalmaterials,manyresearcheshavebeenconductedonthepreparationofself-lubricatingwear-resistantcoatings.Amongthem,NiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatinghasattractedmuchattentionduetoitsexcellentperformance,suchashighhardness,goodwearresistanceandlowfrictioncoefficient.Inthisstudy,NiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatingwaspreparedbythermalspraymethod,andthefrictionandwearpropertieswereinvestigated.

MaterialsandMethods

TheNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatingwaspreparedbythermalspraymethod.ThecompositionofthecoatingwasNiCralloy,Cr3C2,BaF2andCaF2.Theweartestswereperformedusingaball-on-diskfrictionandweartester.Thefrictioncoefficientandwearrateweremeasuredunderdifferentloadsandslidingvelocities.Thewearmorphologyandmechanismwereanalyzedbyscanningelectronmicroscopy(SEM)andenergydispersivespectroscopy(EDS).

ResultsandDiscussion

TheresultsshowedthattheNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatinghadexcellentwearresistanceandlowfrictioncoefficient.TheadditionofBaF2/CaF2lubricantreducedthefrictioncoefficientofthecoatingandimproveditswearresistance.Thewearmechanismofthecoatingwasmainlysurfaceabrasiveparticledetachmentandcontacterosion.Thewearmechanismofthecoatingwasrelatedtothetestconditionsandmaterialproperties.

Conclusion

Insummary,theNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatinghasexcellentwearresistanceandlowfrictioncoefficient,whichmakesitapotentialcandidateforhightemperatureandhighwearapplications.Thewearmechanismofthecoatingneedstobefurtherstudiedinordertooptimizeitsperformanceinpracticalapplications.Inadditiontoitsexcellentwearresistanceandlowfrictioncoefficient,theNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatingalsoshowedgoodthermalstabilityandoxidationresistance.ThisisattributedtotheCr3C2andNiCralloycomponents,aswellastheself-lubricatingeffectprovidedbytheBaF2/CaF2lubricant.Thelubricantcanformaprotectivefilmonthesurfaceofthecoating,whichcaneffectivelyreducethefrictionbetweenthecoatingandthecounterpartandpreventfurtherweardamage.

Moreover,theadditionofBaF2/CaF2lubricantcanalsohelptoreducethetemperatureriseandpreventsurfacemeltingduringthefrictionprocess.Thisisparticularlyimportantforhigh-temperatureandhigh-speedapplications,wherethethermalstabilityandoxidationresistanceofthecoatingarecrucialtotheperformanceanddurabilityofthematerial.

Overall,theNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatingshowspromisingpotentialforvariousindustrialapplications,suchasaerospace,powergeneration,andchemicalengineering.Furtherstudiesareneededtooptimizethecompositionandprocessingparametersofthecoatingtoenhanceitsperformanceandexpanditsapplicationrange.Inaddition,theNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatinghasseveralotheradvantagesthatmakeitappealingforindustrialapplications.Forone,thecoatinghasexcellentadhesiontovarioussubstrates,includingmetals,ceramics,andcomposites,whichallowsittobeappliedtoawiderangeofmaterials.Additionally,thecoatingcanbedepositedusingdifferenttechniques,suchasplasmaspraying,electroplating,andchemicalvapordeposition,makingithighlyversatile.

Anotheradvantageofthiscoatingisitslowfrictioncoefficient,whichnotonlyreduceswearandtearbutalsominimizesenergyconsumptionandincreasestheefficiencyofthesystem.Theself-lubricatingeffectprovidedbytheBaF2/CaF2lubricantalsoenablesthecoatingtooperateindryandharshenvironmentswhereconventionallubricantsmaynotbesuitable.

Furthermore,theNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatinghasbeenshowntohavegoodcorrosionresistance,whichcanextendthelifespanofthematerialinharshorcorrosiveenvironments.ThisisduetothesuperiorchemicalstabilityoftheCr3C2andNiCralloycomponents,whichcanresisttheattackofvariouschemicalsandacids.

Insummary,theNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatinghasauniquecombinationofpropertiesthatmakeithighlyattractiveforindustrialapplications.Itsexcellentwearresistance,lowfrictioncoefficient,thermalstability,oxidationresistance,adhesion,andcorrosionresistance,makeitanidealcandidateforavarietyofengineeringandmanufacturingapplications.Futureresearchwillundoubtedlyuncovernewwaystoenhanceitsfunctionalityandexpanditspotentialapplicationrange.OnepotentialapplicationfortheNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatingisintheaerospaceindustry.Thecoating'shightemperatureandoxidationresistance,combinedwithitslowfrictioncoefficientandexcellentwearresistance,makeitidealforuseinhigh-temperature,high-stressenvironmentssuchasgasturbineengines.Theself-lubricatingpropertiesofthecoatingwouldreducetheneedforadditionallubrication,improvingefficiencyandreducingmaintenancerequirements.

Anotherpossibleapplicationisintheautomotiveindustry,particularlyforenginecomponentssuchaspistons,valves,andbearings.Thecoating'sabilitytoresistwearandcorrosion,combinedwithitslowfrictioncoefficient,couldimprovethedurabilityandfuelefficiencyofthesecomponents,leadingtoincreasedperformanceandlongevity,andreducedmaintenancecosts.

TheNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatingcouldalsobeusedinthemanufacturingofcuttingtools,suchasdrills,endmills,andsawblades.Thecoating'swearresistanceandlowfrictioncoefficientwouldimprovethedurabilityandprecisionofthesetools,reducingtheneedforfrequentsharpeningandincreasingtheirefficiency.

Finally,theuniquepropertiesoftheNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatingalsomakeitapotentialcandidateforuseinbiomedicalapplications.Forexample,thecoatingcouldbeappliedtomedicalimplantssuchasjointreplacements,improvingtheirwearresistanceandreducingtheriskofmetalionreleaseintothebody.

Overall,theNiCrCr3C2-BaF2/CaF2self-lubricatingwear-resistantcoatinghassignificantpotentialinvariousindustrialapplicationsduetoitsexcellentcombinationofproperties.Furtherresearchanddevelopmentwillundoubtedlyuncoverevenmorepotentialusesforthisinnovativecoatingtechnology.Intheaerospaceindustry,theself-lubricatingwear-resistantcoatingcouldalsobeappliedtocomponentssuchaslandinggear,bearings,andgears.Thesecomponentsaresubjecttohigh-stressandabrasiveenvironments,whichcancausewearandtear.However,withtheapplicationofthiscoating,theycouldbecomemorereliable,efficient,andrequirelessmaintenance.

Intheagriculturalindustry,thecoatingcouldbeusedontillageequipment,plows,andcultivators.Thesemachinesrequirefrequentmaintenanceduetothesevereabrasionstheyundergowhileworkinginthefields.Theapplicationoftheself-lubricatingwear-resistantcoatingwouldextendtheirlifespanandreducetheneedforfrequentrepair.

Inthemanufacturingindustry,thecoatingcouldbeappliedtomoldsusedintheproductionofplasticmaterials.Themoldsaresubjectedtohightemperaturesandpressure,acombinationthatcanresultincorrosion,erosion,andwear.Theapplicationofthecoatingwouldprovidealong-lastingrel