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简介：Onthebasisofthinfilmlubricationtheory,theinfluenceoffluidfilm(disorderedfilm),orderedfilmandadsorbedfilmontribologicalbehavioroflubricatingoilinthin-filmlubrication(TFL)regimewasstudied.Theμ-L(frictioncoefficientversusload)curvesofdifferentoilviscosityandadditivedosagewereobtainedbyahighfrequencyreciprocatingtestrigandtheadsorptioncapacityofadditiveonsteelsurfaceweremeasuredbyQCM-D.BasedontheStribeckcurveandthinfilmlubricationtheorymodel,someconclusionscanbedrawnup,namely:(1)Theμ-LcurvesandtheparametersofL0andμ0,obtainedfromthehighfrequencyreciprocatingtestrigwithball-disccontact,canbeusedtostudytribologicalbehaviorsoflubricatingoilunderTFLconditions.(2)Incomparisonwiththehighviscositybasefluid,theloweronecanenterintoTFLregimeunderlowerloadandkeepsalowerfrictioncoefficientinTFLregime.(3)Thepolarmoleculesinadditiveformulationproduceorderedadsorbedlayeronsteelsurfacetoreducefrictioncoefficient.AndinTFLregime,themolecule’spolarity,layerthicknessandsaturationdegreeonsteelsurfaceprobablycaninfluencelubricant’stribologicalbehaviorsbetweenthemovinginterfaces.Moreover,thefurtherstudywouldbefocusedonthecompetitiveadsorptionofdifferentadditives,theformationofdual-and/ortri-molecularadsorptionlayers,andotheraspects.

简介：Inthispaper,anabinitio,localdensityfunctional(LDF)methodwasusedtoexploretherelationshipbetweenthemolecularpropertiesofadditivesandthelubricatingperformanceofaluminumrollingoil.Thestructuralpropertiesofbutylstearate,dodecanol,docosanol,andmethyldodecanoatewerestudiedaccordingtothedensityfunctionaltheory.Thecalculateddatashowedthattheatomsinoraroundthefunctionalgroupsmightbelikelythereactingsites.Becauseofthedifferentfunctionalgroupsandstructureofesterandalcohol,twotypesofcomplexadditives,dodecanolandbutylstearate,methyldodecanoateandbutylstearate,respectively,werechosenforstudyingtheirtribologicalpropertiesandperformingaluminumcoldrollingexperiments.Thetestresultsagreedwiththecalculatedresultsverywell.Thecomplexester,viz.methyldodecanoateandbutylstearate,hadthebestlubricatingperformancewithafrictioncoefficientof0.0841andapermissive-rollingthicknessof0.040mmascomparedwiththatofdodecanol-butylstearate-baseoilformulation.

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简介：有优秀的反的涂层和免职过程穿并且对工业申请合适被开发，并且最佳洗澡作文和进程被在免职率和plating解决方案稳定性上学习洗澡作文，温度和pH价值的影响获得。而且，润滑添加剂和无电的扔的Ni-W-P涂层以及他们的synergistic效果的nano-Cu的tribological性质用测试机器和精力的戒指块磨损被研究散分光计。研究结果证明那Ni-W-P合金涂层和nano-Cu润滑添加剂有优秀synergistic效果，eg，Ni-W-P合金涂层的wear抵抗(与有nano-Cu添加剂的热处理和油)增加了乘的百比是的45钢有基本的油的金属底层，并且零穿被完成，它突破以前的分开的研究的瓶颈上述二个方面。