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ID:55724301
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页数:8页
时间:2020-06-01
《纳米稀土颗粒CeO_2掺杂对Ni-P脉冲镀层微观结构与沉积机理的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、Availableonlineatwww.sciencedirect.com.一,,.Transactionsof·::,ScienceDirectNonferrousMetals黉SocietyofChinaPressTrans.NonferrousMet.Soc.China22(2012)1981—1988www.tnmsc.caMicrostrucmreanddepositionalmechanismofNi_——Pcoatingswithnano-ceriaparticlesbypulseelectrodepositionZHOUXiao—wei,SHENYi.
2、fu,JINHui.ming,ZHENGYing.ying1.CollegeofMaterialsScienceandTechnology,NanjingUniversityofAeronauticsandAstronautics,Nanjing210016,China;2.CollegeofMechanicalEngineering,YangzhouUniversity,Yangzhou225127,ChinaReceived10August201I;accepted28October2011Abstract:Nano-CeO2(RE)particleswereco-
3、depositedintoNi—Pbinarycompositecoatingsbyapplyingpulsecurrent(PC)underultrasonicfU)field.Morphology,chemicalcontentandcrystalmicrostructurewerecharacterizedbyenvironmentalscanningelectronmicroscopyfE—SEM)withenergydispersiveX-rayanalysis(EDXA),xRDdiffractometryandtransmissionelectronmic
4、roscopy(TEM).ExperimentalresultsshowthatNi-Pcoatingreinforcedwim15egLnano—CeO2,inamorphousstateandwithcompactsnuctLlre,canbeimprovedinthemicrohardnessfromHV02580toHV02780byannealingat600。Cfor2h.ThehighestcontentofcodepositedCeanddepositionratecanreach2.3%and68run/h,respectively~Furthermo
5、re.theefectofREadsorptionandpulseoverpotentialondepositionalmechanismwasinvestigated.n.CeO2particlesorCe4+ionswithstrongadsorptioncapacityactedasthecatalyticnucleustoimprovedensificationefectively.Duringannealingat600。Cfor2h,l,/.CeO2particleswilluniformlyadsorboncrystalgraintopreferentia
6、llypadandhealupgapsofcrackingNiboundaries,promotingdispersionstrengtheningwithrefiner-grainedstmcn.Keywords:Ni-Pcoating;pulseelectrodeposition;overpotential;depositionalmechanism;CeO2theexperimentalprocedure,chemicalcontent,lIntr0ductiOnmorphologyanalysis.ormicrostructura1characterizatio
7、n.SEOeta1『81indicatedthatasignificantimprovementonCeriumoxide(CeO2),asoneofthemostpowerfulmicrostructuralevolutionandmechanicalpropertiesofandfascinatingrareearthoxides,hasbeenwidelyNi-PcoatingsareassociatedwithprecipitatedNi3Pappliedtocatalystsystems,solidstateelectrolyt
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