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1、?24?6?Vol.24 No.62 0 1 0?12?CHINESE JOURNAL OF MATERIALS RESEARCHDecember 2 0 1 0?(?110016)?(CF)?(ZrO2)?(PEEK)?,?,?,?,?,?,?,?,?,?PEEK?PEEK?,?,?,?,?,?,?TB332?1005-3093(2010)06-0625-06Study on the Tribological Properties of PolyetheretherketoneComposites Reinforced by ZrO2Particles and Short CarbonFib
2、ers under Water LubricationZHONG YingjieXIE GuangyouSUN ZhaosongSUI Guoxin(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016)Manuscript received May 18,2010;in revised form June 24,2010.*To whom correspondence should be addressed,Tel:(024)83978040,Email:ABSTRACTPEEK matrix comp
3、osites filled with short carbon fibers(CF)and ZrO2particles werecompounded using a twin-screw extruder followed by injection molding.The tribological properties of thePEEK/CF/ZrO2composites under the water lubrication were systematically studied.It was revealed thatthe hybrid composites exhibit exce
4、llent wear-resistance in the water conditions.The friction coefficientsof the composites slightly changed with increasing of the applied load,while the wear rates of the hybridcomposites decreased with increasing applied load.Main wear mechanism of the composites in water wasmild abrasive wear and f
5、atigue wear.The high wear resistance of the composites should be attributed tothe existence of the carbon fibers:the carbon fibers carried the main load between the contact surfacesand protected the soft polymer matrix from further severe impact and abrasion of the counterpart.Theincorporation of th
6、e ZrO2particles could effectively inhibit the carbon fiber failure and debonding,whichresulted in a better wear resistance property of the hybrid PEEK composites compared with sole CFreinforced PEEK composites.However,high loading of the particles would also aggravate the fatigue wearof the composit
7、es and lead to a deterioration of the wear resistance of the composites.KEY WORDS composite,polyetheretherketone,friction and wear,hybrid reinforcement,carbon fiber,water lubrication?,?(PEEK)?,?13,?2010?5?18?;2010?6?24?:?,?,?,?4,?(?)?PEEK?626?24?626?24?626?24?,?(?);?PEEK?5,6?,?,?,?,?,?,?,?,?(CF)?,?,
8、CF?PEEK?,?7?,?,?8?,?,?,?,?912?,?,?,?,?,?(ZrO2)?,?PEEK/CF/ZrO2?,?,?1?PEEK?PEEK/30%CF?(ZrO2),?800 nm?PEEK?PEEK/30%CF?,?(PEEK/xCF/yZrO2,?x?CF?,y?ZrO2?)?150?6 h,?,?,?,?380?,?180?MM-W1A?,?1500#SiC?,?Ra=0.038m?,?,?18 MPa?,?,?(?METTLER AE240,?0.01 mg)?(K)?:K=mFNL(mm3N1m1)(1)?m?;?;FN?;L?,?2?2.1?1?PEEK/15CF/
9、15ZrO2?PEEK?PEEK/15CF/15ZrO2?1MPa?,?,?,?(?1a);?0.01?,?1.95108mm3/Nm?PEEK,?PEEK?,?(?1b)?2.2?PEEK/CF/ZrO2?,?,?13?,?,?,?14,15?,?PEEK/CF/ZrO2?PEEK/CF/10ZrO2?2?,?PEEK/6?:?6276?:?6276?:?627?1PEEK/15CF/15ZrO2?PEEK?:?;?:2 m/s;?:2 hFig.1 Effect of load on the tribological properties of PEEK/15CF/15ZrO2and ne
10、at PEEK.(a)wearrate and friction coefficient of PEEK/15CF/15ZrO2(b)wear rate of PEEK/15CF/15ZrO2andPEEK?2PEEK/CF/10 ZrO2?CF?:?;?:2 m/s;?:2 hFig.2 Effect of the CF content on the tribological properties of the PEEK/CF/10ZrO2composites.(a)friction coefficient(b)wear rate10ZrO2?,?4 MPa?,?,?2h?8 MPa?,?,
11、?,?,?,?,?0.02?,?CF?20%?,?,?PEEK/20CF/10ZrO2?8 MPa?6.19109mm3/Nm,?,?CF?,?PEEK/10ZrO2?PEEK/10CF/10ZrO2?4 MPa?SEM?3(a)?,?,?PEEK?,?,?,?,?3b?c?,?,?PEEK/10ZrO2?CF?,?,?,?628?24?628?24?628?24?3PEEK/10ZrO2?PEEK/10CF/10ZrO2?4MPa?:?;?:2 m/s;?:2 hFig.3 The typical morphologies on the worn sur-faces of PEEK/10Zr
12、O2and PEEK/10CF/10ZrO2compositeunder4MPa.(a)PEEK/10CF/10ZrO2(b)PEEK/10ZrO2(c)PEEK/10ZrO2?CF?2.3?PEEK/CF/ZrO2?4?PEEK/10CF/ZrO2?4a?,PEEK/10CF?,?,?1 MPa?,?;?4b?4PEEK/10CF/ZrO2?ZrO2?.?:?;?:2 m/s;?:2 hFig.4 Effect of ZrO2content on the tribologicalproperties of the PEEK/10CF/ZrO2compos-ites.(a)friction c
13、oefficient(b)wear rate?W?,?1 MPa?,?5%?,PEEK/10CF/5ZrO2?PEEK/10CF?,?10%?,?,?15%,?,?20%?,?,?PEEK/10CF/5ZrO2?PEEK/10CF?SEM?5a?5b?,?8 MPa?,PEEK/10CF?,?PEEK/10CF/5ZrO2?,?5%?,?10,16?,?,?6?:?6296?:?6296?:?629?5PEEK/10CF/5ZrO2?PEEK/10CF?8 MPa?:?;?:2 m/s;?:2 hFig.5 The morphologies of the worn surfaces of PE
14、EK/10CF/5ZrO2and PEEK/10CF composites.(a)PEEK/10CF/5ZrO2(b)PEEK/10CF?6PEEK/10CF/5ZrO2?PEEK/10CF/10ZrO2?1 MPa?:?;?:2 m/s;?:2 hFig.6 The morphologies of worn surfaces of PEEK/10CF/5ZrO2and PEEK/10CF/10ZrO2compos-ites at 1 MPa.(a)PEEK/10CF/5ZrO2(b)PEEK/10CF/10ZrO2(c)PEEK/10CF/5ZrO2(d)PEEK/10CF/10ZrO2?1
15、PEEK/CF/ZrO2?Table 1 The micro-hardness of PEEK/CF/ZrO2compositesMaterial(PEEK/CF/ZrO2)90/5/585/5/1080/5/1575/5/20Micro-hardness,kg/mm327.60.828.81.330.91.432.31.0?,?,?,?,?,?,?,?(?5a,5b),?:?,?1?,?,?,Zhang?12?,?,?,?,?,?,?,?,?630?24?630?24?630?24?,?SEM?,?6?PEEK/10CF/5ZrO2?PEEK/10CF/10ZrO2?1 MPa?6a?6b?
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