铝基复合材料英文版PPT

SiliconcarbideparticulatereinforcedAl-matrixcompositecatalogueMatrixandpropertiesReinforcementandpropertiesPreparationmethodsApplyBackgroundThematrixaluminumAluminumisasilverywhiteandlightmetal.Itsmeltingpointis660℃,boilingpointis2327℃.Aluminumcontentintheearth‘scrustissecondonlytooxygenandsilicon,inthethirdplace,isthemostabundantmetalelementscontentinthecrust.Theuniquepropertiesofaluminumanditsalloysmakeitwidelyuseintheaerospace,construction,automotiveandotherfields.ReinforcedsiliconcarbideSiliconcarbideisalsocalledcorundumsandorrefractory.Atpresent,theindustrialproductionofsiliconcarbidecanbedividedintoblacksiliconcarbideandgreensiliconcarbide,andtheyarethesix-partycrystals.Thehardnessofsiliconcarbideisverybig,ithasgoodthermalconductivityandelectricalconductivity,canoxidationresistanceathightemperature.Siliconcarbidehardnessisbetweencorundumandbetweendiamondandmechanicalstrengthhigherthanthatofcorundum,sharpandcrisp.BackgroundSincetheearly80s,foreigninvestedconsiderableresourcescommittedtotheresearchofparticlereinforcedaluminummatrixcomposites,andhassetupinareassuchasaerospace,sports,electronicapplications.Domesticsincethemid-80-withthesupportof863project,afteryearsofefforts,inthestudyofparticlereinforcedaluminummatrixcompositeshashadtheverybigenhancement,themicrostructuresandpropertiesofmaterial,compositematerialinterfaceaspectsofresearchworkhasbeenclosetotheinternationaladvancedlevel.•Therearemanywaystopreparationofaluminummatrixcompositesandoneforsemi-solidstirringmethod.Itisintheprocessofmixing,willenhancephaseparticlesjointhesemi-solidmetallicmelts.PreparationmethodsPreparationmethods•Theparticleinsemi-solidmeltandmetalparticlescollidewitheachother,friction,shear,promotedthecompositeparticlesandliquidmetalinfiltration,understrongstirringparticlesareevenlydistributedinthemelt.ApplyThedensityofsicparticlereinforcedaluminummatrixcompositesisonly1/3ofthesteel,butitsstrengthishigherthanpurealuminumandmediumcarbonsteel.ApplyAndalsohashighwearresistance,canunderthehightemperatureof300℃~350℃stablework,hasbeenappliedtotheenginepiston,connectingrod,andbrakepads.Thankyou!