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1、石墨烯增强铝基纳米复合材料(GrapheneReinforcedAluminumMatrixNanocomposites)GraphenenanosheetsaretwodimensionalmaterialsconsistingofSP2hybridcarbonatomswithasingleatomiclayerthickness,whichexhibitaseriesofunusualphysicalproperties.GraphenenanosheetswerepreparedbytapestrippingmethodinNovoselovand[1]
2、in2004.Themicrostructureandphysicalpropertiesofgraphenenanosheetswerecharacterized.Graphenenanosheetsduetoitsuniquetwo-dimensionalstructure,physics,chemistryandmaterialshasattractedgreatinterestofscholars,thegraphenebasedresearchandengineeringapplicationof[2]hasbecomearesearchhotspot
3、inrecentyears.Grapheneisthemosttenacious,conductive,andthermalmaterialeverfoundexperimentally.Inordertomakegraphenetotheengineeringapplicationstateassoonaspossible,theEuropeanUnionin2012launchedflagshipprojectofgraphene[3],theUnitedStateshasinvestedheavily,andintheapplicationofgraphe
4、neasasupercapacitorhasmadebreakthroughprogressin[3].Thepreparationofgraphenenanosheetsiseasytoachievebywetchemicalreduction,andtheobtainedgraphenehasgoodhydrophilicityandmonodisperseproperty,andisanidealcompositenanofiller[4].Asgraphenehashighstrength,itstensilestrengthcanreach1060GP
5、a.Howtouseittoimprovethestrengthofcompositehasbecomearesearchhotspot.Atpresent,therearereportsaboutgraphenenanosheetsreinforcedpolymer[5]andceramicmaterial[6].Fillgrahenewith0.7%massfractionofPVA,thetensilestrengthincreasedby76%[5];Al2O3ceramicmatrixwithgraphenenanofilmswith0.78%volu
6、mefraction,theflexuralstrengthincreasedby30.75%,whileimprovingthebreakingstrengthof27.20%[6].However,noreportsaboutgraphenenanosheetsreinforcedmetalmatrixcompositeshavebeenreported.Aluminumalloyswithlowdensity,highstrengthandgoodductilityarewidelyusedinaviation,aerospaceandotherfield
7、s.Asastructuralmaterial,howtoimprovethestrengthofaluminumalloyhasalwaysbeenthemaindirectionofitsresearchers.Atpresent,itisdifficulttoimprovetheperformanceofaluminumalloybychangingthealloysmeltingmethod,adjustingthecomposition,adjustingtheheattreatmentanddeformationprocess,andaluminum
8、matrixcompos