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万方数据 materialscarbon.ⅢsDocumenttreatment.ThePreparationandcharacterizationofcarbon/carbonaircraftbrakewithlongservicelifegoodfrictionalpropertiesZhi—gan91,integrity.neoC.nese1IntroductionreceivedanUnitedbeenintroduced.Accordinglandings.3brakesdifficultreiec—cooling”1betweenmatrix。microstructure,andbehaviors2Experimentalprocedures(2)Diluted(3)Resin第25卷第5期新型炭材料2010年10月1007-8827(2010)05-0329-06Yong—qion91,MENG(1.藏缸Chaomalmtitute,瓜缸710025,Ch/na;cooling”).Forformed.Theadvancedabroadperformance.Thedesignedoverloadabortedtoemcientlandings.24%timesAirplanes;Carbondisc;Carbon/carboncoefficient(C/Ccomposites)havemarketMessier—arecarbonhasthematerials.itprocessesgradient(1.externalthermaling”and”internalpyrocarbon,andtemperature(1)Precursor:propyleneNEWMATERIALSArticlesuJun—min91,XIAOZhi—cha01,LIUFan—cail,PENGGULi—minl,LIGuo—fen92,XINGRu—pen91ofShenz缸nAirlines,Shenzhen518128,China)pmparedpreformwasimpregnated800℃infiltration(CVD)usingasgradient(”externalcooling”or”internalperformsseparat[eclfleecomparedtermscondition.the翻ction48%highertoe腼cient28%higherthanmanufacturer.Thecomposites;Frictionnumber:TBcode:fiberreinforcedmatrixcompositesconsiderabletionbecauselowdensitysuperiorproperties.Asdisc,C/Chaveusedinpastfortyyears.TherepotentialforaJircraftmaterials.whichisoccupiedbyfivecompaniesincludingBugaRii11France:Hitco,Honeywell,andGoodrichStates:andDunlopEnglandJ.InChina,about700airplanesthatequippedbondiscs000500disosneededeveryyear.costingabout1.2billionYuan.Especially,thedomesticairplaneprogramakeadyenabled.Inordercatchuptechnologysupportair-planedevelopingprogram,itnecessaryrealizeapphcationcrafts.Thehighproperties.However。controlattenuationfrictiontoef!ficientundertedtakeoffconditionL⋯.Therefore.thisinvestigationaimsevaluateeffectsthreedisos.i.e.adialtherl/lalinternalcool—externalCVImethodslitdirectionalpropylene.dual—resinhigh—correlationstudied.2.1Rawgas:high—purityN2impregnation:phenoficJun—ruing(1937一),male,Professionterials.E—mail:zhangyonghui@x解mkj.cornSeienceDirect(h