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1、蘭州大學(xué)2007屆頸士研究生學(xué)位論文摘要碳纖維增強(qiáng)復(fù)合材料是目前最先進(jìn)的復(fù)合材料之一。它以其輕質(zhì)高強(qiáng)，耐高溫，抗腐蝕，力學(xué)性能優(yōu)良等特點(diǎn)廣泛用作結(jié)構(gòu)材料及耐高溫抗燒蝕材料。碳纖維增強(qiáng)鋁基復(fù)合材料以其高的比強(qiáng)度、比剛度、軸向拉伸強(qiáng)度和耐磨性，優(yōu)異的耐高溫性能和低的熱膨脹系數(shù)，良好的導(dǎo)電、導(dǎo)熱性、抗疲勞性等優(yōu)點(diǎn)在汽車，航天等領(lǐng)域有著廣闊的應(yīng)用前景。本論文采用粉末冶金的方法制備了致密度較好的短碳纖維增強(qiáng)鋁基復(fù)合材料，對制備復(fù)合材料的關(guān)鍵工藝碳纖維的表面鍍銅進(jìn)行了優(yōu)化，較好的解決了短碳纖維與基體的相容性問題。對復(fù)合材料進(jìn)行了力學(xué)性能和摩擦磨損性
2、能的測試，測試結(jié)果如下；1．隨著Cf體積分?jǐn)?shù)增加，材料的致密度下降，硬度和抗拉強(qiáng)度呈現(xiàn)先增大后減小的規(guī)律。硬度最多可提高一倍之多，抗拉強(qiáng)度也比提高了80％以上。2．碳纖維增強(qiáng)鋁基復(fù)合材料的主要磨損行為是塑性變形，而復(fù)合材料的磨損機(jī)制主要是粘著磨損和氧化磨損，并隨著復(fù)合材料的成分不同，磨損的主要機(jī)制所占的比例也隨之變化。關(guān)鍵詞：粉末冶金，鋁基復(fù)合材料，碳纖維，力學(xué)性能，摩擦學(xué)性能蘭州大學(xué)2007屆碩士研究生學(xué)位論文AbstractThecarbonfiberreinforcedcompositeisoneofpresentmostadva
3、ncedcomposites，Itexcelsinitslightquality,thermostable，thecorrosionresistance，excellentthermodynamicsperformanceandSOon．Thecharacteristicswidelys睨'veaSthestructuralmaterialtoanticipatethethermostableanti-ablatant．Becauseitshighspecificstrengthandrigidity,theaxiallongitudi
4、nalstrengthandtheresistancetowear,theoutstandingthermostableperformance，thelowthermal—expansioncoefficient,goodelectricconduction,thermalconductivityandfatigueresistancethecarbonfiberreinforcedaluminummatrixcompositehavethebroadapplicationinautomobile，astronautics，indust
5、riesetc．Inthisthesis，shortcarbonfiberreinforcedaluminummatrixcompositeswerepreparedbypowermetallurgytechnologyandthesampleshaveabetterdensity．Thetechnologyofcopper-platingtocarbonfibersurfaceswereoptimizedtoobtainasolutionsolvethecompatibilitybetweenshortcarbonfibersandm
6、atrixmartial．1f11emechanicalperformanceandIxibologicalbehaviorofthecompositewerealsodiscussed，themainresultsare鵲follows：1．Withtheincreasingofthereinforcedfibers，thecompactnessofcompositesdecreased，thehardnessandtensilestrengthofthecompositesincreasedatthebeginningandthen
7、decreasedwiththecontinuouslyincreasingofthereinforcedfibers．ThehardnessofthecompositeswasbeII蘭州大學(xué)2007屆碩士研究生學(xué)位論文twicemorethanbeforeheattreatmentandthetensilestrengthwasbeincreasedbyabout80％．2．ThemainwearbehavioroftheshortcarbonfiberreinforcedaluminummatrixcompositesWaspla
8、sticdeformation．Thewearmechanismsofthecompositesweremainlytheadhesivewearsandoxidativewears，theratiobet
