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1、j:海人學(xué)碩Ij學(xué)位論文(2005)SiC顆粒增強(qiáng)鋁基復(fù)合材料的制各方法與摩擦磨損t4:能研究摘要本文以開發(fā)輕量化高性能汽車材料為目的,系統(tǒng)研究了SiC微顆粒增強(qiáng)鋁復(fù)合材料的制備方法和摩擦磨損性能。自行設(shè)計(jì)并制造了復(fù)合材料制備裝置,成功制備了以鑄造鋁合金為基體,含有不同粒度和含量SiC顆粒的復(fù)合材料。以Santana轎車用非金屬摩擦材料為對(duì)偶材料,對(duì)復(fù)臺(tái)材料進(jìn)行了摩擦磨損試驗(yàn),研究了復(fù)合材料摩擦磨損性能與復(fù)合材料熱處理、SiC粒度、SiC含量,以及摩擦試驗(yàn)條件的關(guān)系。結(jié)果表明:摩擦系數(shù)與復(fù)合材料中SiC含量關(guān)系不大,經(jīng)過T6熱處理的復(fù)合材料顯示較高的摩
2、擦系數(shù)。當(dāng)滑動(dòng)速度一定時(shí),摩擦系數(shù)一般隨摩擦壓力的增大而下降,但對(duì)于不同的速度,摩擦系數(shù)隨壓力的變化并不相同;復(fù)合材料的耐磨性明顯優(yōu)于基體合金、鑄鐵及純鋁,且隨著SiC粒度減小、含量增大,復(fù)合材料的耐磨性能逐漸提高,熱處理可以明顯提高復(fù)合材料的耐磨性能。在國(guó)家標(biāo)準(zhǔn)摩擦材料檢測(cè)設(shè)備上,取三種典型配方的摩擦材料與SiC增強(qiáng)鋁基復(fù)合材料進(jìn)行了摩擦試驗(yàn),找到了一種比較接近TL.110標(biāo)準(zhǔn)的對(duì)偶材料,為對(duì)偶材料的開發(fā)提供了借鑒。本文還對(duì)SiC顆粒增強(qiáng)鋁基復(fù)合材料的摩擦磨損機(jī)理進(jìn)行了探討,并且在大量試驗(yàn)的基礎(chǔ)上,初步確定了SiC顆粒增強(qiáng)鋁基復(fù)合材料的成分配方和制備
3、工藝。關(guān)鍵詞:SiC鋁基復(fù)合材料制備方法摩擦系數(shù)耐磨性f:晦大學(xué)碩。}:學(xué)位論文(2005)SiC顆粒增強(qiáng)鋁基復(fù)合材料的制各方法與摩擦磨損性能研究ABSTRACTThemanufacturingmethodsandfrictionandwearpropertiesofSiCparticulatesreinforcedaluminummatrixcompositeswereresearchedinthisthesisinordertodevelopnewtypeofautomotivematerialswithlittleweightandgoodper
4、formance.Castingaluminumalloymatrixcompositesreinforcedwithdifferentsizeandcontentweresuccessfullymanufacturedusingtheequipmentdesignedpersonally.Therelationbetweenthefrictionandwearpropertiesofthecompositesandheattreatment,sizeandcontentofSiCparticulateswerestudiedslidingagains
5、tnonmetalfrictionmaterialsbeingusedinSantanacars.TheresultsshowthatthefrictioncoefficientsarenotobviouslyaffectedbythecontentofSiC,butevidentlyenhancedbyT6heattreatmentprocess.Thecoefficientsusuallydecreasewithincreasingloadsandcertainslidingvelocity,butthechangetrendsofthecoeff
6、icientsinfluencedbyloadsaredifferentwithdifferentslidingvelocities.Thewearresistancepropertiesofcompositesarewellbetterthanthatofthematrixalloy,castingironandaluminum.AndthewearpropertiescallbeenhancedwithincreasingcontentanddecreasingsizeofSiCparticulates,aswellastheheattreatme
7、ntprocessofthecomposites.ThreetypicalkindsofnonmetalmaterialsweretestedsidingagainstthecompositeswiththestandardinspectionequipmentappointedbyStateforthesakeofsearchingappropriateoppositematerials,andoneofthethreekindsofmaterialsprovedhopefultobecometheneededmaterial.Thefriction
8、andwearmechanismsofSiCreinforcedaluminumcomposi