1、●bn刪⑧天津夫尊中目R第一所★學(xué)碩士學(xué)位論文學(xué)科專業(yè)：撾抖芏——作者姓名：莖塹指導(dǎo)教師：王吉盒副熬控2004年12月ABSTRACTItwasshowedbyearlyresearchesthatnearly70％failureofthecomponentswascausedbyfrictionandwearwhichledgreatlosstOthecivileconomyTherefore，itisofgreatimportanc

2、etoimprovethecomponents’propertiestofrictionandwearCompositeplatingtechniqueshavetheadvantagesoflessinvestment，easieroperationaswellasthepropertiesadjustmentwiththedifferentdesiredrequirements，SOthathaveaveryprosperousap

3、plicationinsurfacescienceandengineeringInrecentyears，withthedevelopmentofnanotechnologynanocompositeplatingtechniqueshavebeengraduallyformedComparedwiththecommonlayerwithmicronparticlesthellanOcompositecoatingshavehigher

4、hardness，betterselflubricatingperformanceandhigherwealresistanceAgreatdealofselectiveexperimentshasbeendonetoexploretheoptimalpreparationparametersoftheNi—basedcoatingsThebestparametersforNi—PTFEcoatingareasfollows：pH35，

5、cathodiccurrentdensity7A／cm2，60min，60℃and48mol／LPⅡEcontentWhereasforNi—PSi3N4coatingstheoptimalparametersarepH48，cathodiccurrentdensityof3A／dm。，60min，75“CandO59／LSi3N4contentAccompanied、Ⅳitlltheincreasingoffactorslisteda

6、bovetheplatingrateofNiP—Si3N4coatingexhibitedatrendoffirstlyincreaseandthendecreaseInaddition，whentheSi3N4concentrationincreasedfurtherthedepositionratereducedgraduallyandreachedacertainvalueatlast，Themorphologymicrostru

7、cture，hardnessaswellaSfrictionandweal“behaviorsofNi—baSedcompositecoatingswereobservedanddeterminedbyusingXRD，SEM，MH一6microhardnesstesterandfrictionandweartesterNiP—Si3N4coatingobtainedWascompactandsmoothAfteraheattreatm

8、entat400℃thehardnessofthecoatingcanreachavalueupto9958HVwhichismuchhigherthanthatofNi—PcoatingNi—PTFEcoatingisalsocompactsmoothanduniformUnderthesarneloadandtestduration，thecoefficientoffrictionandthewearlossofNi—PTFEcoa

9、tingarelessthanthatofNi—PSi3N4coatingNiPTFE—Si3N4compositecoatingWasdesignedanddevelopedbasedontheoptimalpreparationparametersforNi—P—SisN4andNi—PTFEcoatingsComparedwithNi—PSi3N4andNi—PTFEcoatings，NiPTFE—Si3N4compositeco