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!45"!2#!"#$%&&'Vol.45No.22011$2%JOURNALOFXI′ANJIAOTONGUNIVERSITYFeb.2011!"#$%犜犻3犛犻犆2&'()*+-./01-./456STTUV(CWXYZH[\GH]Y^H_710048CW)23:()*+-./012Ti3SiC234.5)6789:;<=>?@2AB(CD)E*+-Ti3SiC234FG89:;HIFJK.<=L6789<=>MNOPQRSTE8UVWT25℃XEYWT23%~25%Z[\]T0.5hZ[^WT0.5m/s_`ABT20~60N.<=-abc:deABFf%Ti3SiC234FG89ghi:;jklmnfopqQrsG89ghtABT30N\u%v:;wxLABT40N\u%.5)yz{|}~2ABETi3SiC234FG89:;HIFJK€289:;>‚:ƒAB„…\:;P:;b†‡ˆ‰ŠiTi3SiC2‹ŒŽF:‹:;T‘;ƒAB’“40N\xP”•–F—˜™ši—˜›e:;T‘.456:Ti3SiC2;89:;;AB;:;j789:;:TB331<=>?@:A<AB;:0253?987X(2011)02?0121?04犇狉狔犉狉犻犮狋犻狅狀犪狀犱犠犲犪狉犘狉狅狆犲狉狋犻犲狊狅犳犜犻3犛犻犆2犆犲狉犪犿犻犮狌狀犱犲狉犇犻犳犳犲狉犲狀狋犘狉犲狊狊狌狉犲XIAOQidanLZhenlinZHANGShanshanXIEHui(SchoolofMaterialsScienceandEngineeringXi′anUniversityofTechnologyXi′an710048China)犃犫狊狋狉犪犮狋:Ti3SiC2ceramicispreparedwithreactionsinteringwhosedryfrictionandwearbehavioursareinvestigatedbyaringdisktribologytester.Lowcarbonsteelischosenasthecounterpart.Thetestisconductedatroomtemperatureandrelativehumidityof23%~25%theslidingspeedandthenormalpressurearetakenas0.5m/sand20~60Nfor0.5h.TheresultsshowthatthecoefficientoffrictionandwearratioofTi3SiC2increasefirstandthendecreasewiththeincreasingnormalpressure.Thepeakvaluesofcoefficientoffrictionandwearratioappearwhenthenormalpressuregets30Nand40Nrespectively.TheeffectofnormalpressureonthewearbehavioursofTi3SiC2isanalyzedbyscanningdevice.WhenthepressureislowthemainwearmechanismsarefoundtobeslightabrasivewearcausedbythedesquamatingofTi3SiC2particlesandrheologicbehaviorofwornsurface;whenthepressureishigherthan40Nthemainwearmechanismsarefoundtobeslig