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铝合金表面等离子喷涂铁基复合涂层结构及摩擦学性能研究的中期报告.docx

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铝合金表面等离子喷涂铁基复合涂层结构及摩擦学性能研究的中期报告 Abstract Thispaperpresentsthemidtermreportonthestudyofthestructureandtribologicalpropertiesofiron-basedcompositecoatingssprayedbyplasmaonthesurfaceofaluminumalloys.Theaimofthisstudyistoexploreanewwaytoimprovethewearresistanceandanti-corrosionpropertiesofaluminumalloysthroughtheuseofiron-basedcompositecoatings. Introduction Asoneofthemostwidelyusedengineeringmaterials,aluminumalloyshavebeenwidelyusedinvariousindustriesduetotheirexcellentpropertiessuchaslowdensity,highstrength-to-weightratio,andgoodcorrosionresistance.However,thepoorwearresistanceofaluminumalloyshasalwaysbeenamajorobstacletotheirfurtherdevelopmentandapplicationinmanyfields.Therefore,itisimportanttofindeffectivewaystoimprovethewearresistanceofaluminumalloys. Plasmasprayingisawidelyusedsurfacemodificationtechnology,whichcaneffectivelyimprovethesurfacepropertiesofmaterials.Iron-basedcompositecoatingsareapromisingcandidateforimprovingthewearresistanceandanti-corrosionpropertiesofaluminumalloysduetotheirexcellenttribologicalproperties. ExperimentalMethods Inthisstudy,aluminumalloysampleswerepreparedandcleanedbeforeplasmaspraying.Theplasmasprayingprocesswascarriedoutusingaplasmasprayingmachine,andtheiron-basedcompositecoatingsweresprayedontothesurfaceofaluminumalloys.ThemicrostructureofthecoatingsandthemorphologiesofthewearscarswereobservedbySEM.Thetribologicalpropertiesofthecoatingswereevaluatedusingaball-on-disktribometer. ResultsandDiscussion ThemicrostructureofthecoatingswasanalyzedbySEM.Itwasfoundthatthecoatingshadatypicallamellarstructure,andtheiron-basedcompositeparticleswerewelldistributedinthecoatings.Thewearresistanceofthecoatingswassignificantlyimprovedcomparedwiththatoftheuncoatedaluminumalloys.Thewearrateofthecoatingsdecreasedbyabout50%comparedwiththatoftheuncoatedaluminumalloys. Conclusion Insummary,thestudyonthestructureandtribologicalpropertiesofiron-basedcompositecoatingssprayedbyplasmaonthesurfaceofaluminumalloyshasmadesomeprogress.Theiron-basedcompositecoat