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1、internationaljournalofhydrogenenergyxxx(2015)1e11Availableonlineatwww.sciencedirect.comScienceDirectjournalhomepage:www.elsevier.com/locate/heReviewPreparationtechniqueandalloyingeffectofaluminidecoatingsastritiumpermeationbarriers:Areview*XinXiang,XiaolinWang,
2、GuikaiZhang,TaoTang,XinchunLaiChinaAcademyofEngineeringPhysics,Mianyang621900,PRChinaarticleinfoabstractArticlehistory:AnaluminidecoatingtypicallyFeAl/Al2O3compositecoatingisoneofthemostpromisingReceived18August2014candidatesforthetritiumpermeationbarrier(TPB)i
3、nthetritiumbreedingblanketandReceivedinrevisedformauxiliarytritiumhandlingsysteminfusionreactors.Thepreparationprocessofthealu-24December2014minidecoatinggenerallyinvolvestwostepsofaluminizationandoxidation.InterdiffusionAccepted10January2015occursbetweenAlatom
4、sandFeatomsonthesubstratesurfacetoform(Fe,Al)solidso-AvailableonlinexxxlutionorFeeAlintermetallictransitionlayerinthealuminizationstep.Intheoxidationprocess,thealuminidelayersurfaceisselectivelyoxidizedtoformanAl2O3film.TheKeywords:aluminidecoatingcanbepreparedb
5、ythetechniqueofphysicalvapordeposition(PVD),Aluminidecoatingchemicalvapordeposition(CVD),hot-dippingaluminization(HDA),electro-chemicalTritiumpermeationbarrierdeposition(ECD),packingcementation(PC),plasmasputtering(PS)andsolegeletc.CVD,PreparationtechniqueHDAan
6、dPCtechniquehavepotentialstobeselectedasthecandidateengineeringprep-AlloyingeffectarationtechniqueofthealuminideTPBcoatinginfusionreactors.Meanwhile,ECDtech-InfluencefactorniqueisratherappealingforthepreparationofthealuminideTPBcoatingbecauseofitseasyprocesscont
7、rolling,stablecoatperformanceandavailabilityofcoatingcomplex-geometrystructure.However,comparedwiththepredictionsbasedonthematerialbulkproperties,thealuminideTPBcoatingoftenexhibitslowerefficiencythananticipated.Oneimportantreasonisthatalloyingelementsfromthecoa
8、tingsubstratematerialsandaluminumsourcesexertasignificantinfluenceonthecomposition,microstructure,andperformanceofthealuminidecoatings,thatis,analloyingeffectexistsinthealumin
