幾種粒子納米化前后的摩擦學(xué)特性研究.pdf

1、上海大學(xué)碩士學(xué)位論文幾種粒子納米化前后的摩擦學(xué)特性研究姓名：張玉偉申請學(xué)位級別：碩士專業(yè)：機(jī)械設(shè)計(jì)及理論指導(dǎo)教師：陶德華20030201AbstractAccordingtotherequiredofmordencivilizedproduce，itismoreandmoreaRachedimportantthattakesemifluidgreaseaslubricationbasicoilAddingnano—scalepartic

2、lessuchasgraphiteandaluminium，copperstannumtothesemifiuidgreaseisanewprobleminthefieldoftribologyWhichcanimprovelubricationandstabilizationofthegreaseInthisresearch，integratedcolloidaltheoryintothepulverizationtogainnano

3、—scaleparticlesofgraphite，aluminium，copperandstannumEstimatetheimpectofthesellano—scaleparticlesonthegrease’SlubricationpropertiesThencomparethesenano—scaleparticles’Slubricationpropertieswithotheradditivesandfindtheirus

4、eareainpracticalconditionsInthispapergainedthefittingaddingpropotionofgraphite，aluminium，copperandstannumonfour—balltesterTherespectiveaddingpropotionis3％，6％，4％and3％AdopttingimprovedtechnologythatCanmakenano—scaleparticl

5、es，gainedthesemifluidgreasecomprisednano—scalegraphite，aluminium，copperandstannumTherespectiveaveragediameteris60nm30nm，25nmand40nmMarkthenano—scaleparticlesbyquicklycentrifugalsedimentationandtakeTEMphotosOnlythroughtwo

6、hoursquicklycentrifugalsedimentationallthenano—scaleparticlespartlysedimentatedingreaseButmicron—scaleparticlesfullsedimentateafter30minutesquicklycentrifugalsedimentationPuttedthegreasecomprisednano—scaleparticlesinordi

7、naryconditionoversixmonths，ithasn’tsedimentChemicalactivitieshavekeyactioninmakingnanoscaleparticlesprocessTheactivitiescomprisedfluorinsuchasSA一4，XA—lhavebetterefficacythanT154Tribologicaltestingindicatedthatnano—scaleS

8、n，A1andCuhavebettercapabihtyofanti—wearandanti—frictionthanMoS2，PTFEandgraphitewhichhavelayerconfigurationintheloadingof392Nand490NButintheloadingof294N，nano—scaleSnandgraphitehavegoodcapabilityofanti—wearandanti—frictio

9、n，butthenano—scaleCuandAIdidn’timprovecapabilityofantiwearandanti—frictionNanoscaleCu，A1，Snandgraphitehavemoreimprovementthanmicronscaleinthecapabilityofanti—frictionAccordingtotestresult，discussthemechanismofanti—wearan