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225Vol122No15JournalofMaterialsScience&Engineering91Oct.2004:10042793X(2004)0520705204:2004201205;:2004203201:(1980-),,,,,,,(,730000)M22002(Gr.)(CF)(PTFE),,,,(SEM)PTFE,20%10%PTFE,,;;;:TB332:AStudyontheTribologicalPropertiesofCf2Gr.2PTFECompositesYANGLi2jun,WANGQi2hua,NINGLi2ping,YANGJing2feng,ZHAOPu(StateKeyLaboratoryofSolidLubrication,LanzhouInstituteofChemicalPhysics,ChineseAcademyofScience,Lanzhou730000,China)AbstractThesecompositeswereconsistingofcarbonfiberandgraphiteasthefillingandPTFEasthematrix.Thetribologicalpro2pertiesofthesecompositesunderdryslidingwereinvestigatedonanM2200frictionandweartestrig.WornsurfacesandtransferfilmsofcompositeswereobservedwithSEM.Theeffectofcooperativelubricationofgraphiteandcarbonfiberwasdiscussed.TheresultsshowthathybridfillersofcarbonfiberandgraphiteconsiderablyimprovethewearresistanceofthePTFEcomposites.Theircarryingcapacityandtribo2logicalcapacitywereexcellentathighload.PTFEcompositewith10%carbonfiberand20%graphitecontenthasbesttribologicalcapacity.Keywordsgraphite;carbonfiber;highload;effectofcooperativelubrication1,[123],PTFE,;,PTFE,[4],,,,,,,PTFE,,PTFE,PTFE22.1:PTFE(-200),(-200)(68m),30%(),380PTFE(Tab.1)2.22.2.1M2200230mm7mm6mm,800#GCr15(),40mm16mm10mm,800#1PTFETable1ThecompositionofVariousPTFEcompositesMaterialPTFEPwt.%Gr.Pwt.%CFPwt.%A70300B70255C702010D701515E701020F70030,,,PTFE,120min,:h=R-(R2-b2P4)0.5Vµ27bhP3WS=vPpL:RPmm;bPmm;vPmm3;pPN;LPm,0.01mm2.2.2JSM-5600LV(SEM)PTFE,33.11300NPTFE(Gr.%=30%2CF%,),,,10%20%,,300NC1300NPTFECFGr.Fig.1FrictioncoefficientsandwearrateswithCF%andGr.%in300NforPTFEcomposites2,3PTFE,,PTFE,PTFEPTFEA,EF,,,C,,2PTFEFig.2VariationsoffrictioncoefficientswithloadforcarbonfibersandgraphitefilledPTFEcomposites3PTFEFig.3VariationsofwearrateswithloadforcarbonfibersandgraphitefilledPTFEcomposites3.2SEM4PTFE,,PTFEA[4(a)][4(b)],B,,B607200410,,BC,,,,,,,[4(c)],,,,,[5],[4(e)(f)]4PTFESEM(0.496mPs,200N)Fig.4SEMmorphologyofthewornsurfaceofcarbonfibersandgraphitefilledPTFEcomposites(slidingspeed0.496mPs,loadof200N),,,PTFE,,,,,PTFE,PTFE,[6],,,,,,,,C,F[4(f)],,,,,,,,,3.3SEM5,30%[5(a)],PTFE,,,,5(e)(f),,C,[5(c)(d)],41.PTFE,PTFE2.,,,3.20%10%()PTFE,,707225,.5PTFESEMFig.5SEMmorphologyofthetransferfilmofcarbonfibersandgraphitefilledPTFEcomposites(slidingspeed0.496mPs,loadof200N)[1]Zhao2zhuZhang,Qun2jiXue.FrictionandwearpropertiesofmetalpowderfilledPTFEcompositesunderoillubricatedconditions[J].wear,1997,210:151156.[2],,.Al2O3[J].,2000,20(2):153155.[3],,,.PTFE[J].,1998,17(5):595596.[4],,,.[J].,2002,30(4):2526.[5],,,.[J].,1999,19(1):8790.[6],,.[J].,2002,20(3):361363.807200410