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1、UniversityofCambridgeDepartmentofMaterialsScienceandMetallurgyNATURALSCIENCESTRIPOSPARTIIIMATERIALSSCIENCE&METALLURGYM4−SurfaceEngineeringDrKMKnowlesMichaelmasTerm2005M4PARTIIIMATERIALSSCIENCEANDMETALLURGYM4ModuleM4:SurfaceEngineering6LecturesKMKPhysicalcha
2、racteristicsofthesurfacesofmaterials(4lectures)Chemicalbondingandintermolecularforces.Interactionsbetweensolidsurfacesatthemolecularlevel.Surfaceenergies.Wettingbehaviour.Adhesivecontact.Contactsbetweenmacroscopicsurfaces.Frictionandlubrication.Slidingwear.
3、Abrasiveanderosivewearbehaviour.Useofdimensionalanalysisforformulatingwearrateequations.Occurrenceofresidualstressesinsurfacecoatings.Mechanicalbehaviourofcoating-substrateinterfaces.Casestudiesofsurfaceengineering(2lectures)Inorganicglazesfortraditionalcer
4、amics,enamelling,titaniumnitridecoatings,diamond-likecarboncoatings,coatingsforcuttingtools,self-cleaningwindowglass,coatingsforplasticopticallenses,coatingsforhipimplants,coatingsforceramicfibresinceramicmatrixcomposites.BookListK.HolmbergandA.Matthews,Coa
5、tingsTribology,Elsevier,1994NpT123I.M.Hutchings,Tribology:frictionandwearofengineeringmaterials.EdwardArnold,1992.NpT115J.N.Israelachvili,Intermolecularandsurfaceforces,2nd.edn.AcademicPress,1992.La51E.Rabinowicz,Frictionandwearofmaterials,2nd.edn.JohnWiley
6、andSons,1992NpT131W.S.Robertson,LubricationinPractice,2nd.edn.MacmillanPress,1983NpT72Inadditionthereareanumberofwebsites,conferenceproceedingsandjournalsintheDepartmentallibraryinthegeneralareaofsurfaceengineeringwherethereismaterialrelevanttothiscourse.KM
7、K/MT05M4−2−M4Commontypesofinteractionsbetweenatoms,ionsandmoleculesinvacuum(Israelachvili,2ndedition,p.28)M4–3–M4VanderWaalsdispersionforces•Theseareforcesbetweennon-polarmoleculesarisingfromthenon-zeroaveragevalueofthesquareofthetemporarydipolemomentduetoc
8、hargedensityfluctuationsarisingfromtheinstantaneouspositionsofelectronsinanatomormolecule.•Theforcesaretermed‘dispersionforces’becausetheseforcesarerelatedtothedispersionoflightinthevisibleandUVregions
