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1、AppliedSurfaceScience255(2009)8299–8304ContentslistsavailableatScienceDirectAppliedSurfaceSciencejournalhomepage:www.elsevier.com/locate/apsuscHeattreatmentinducedintermetallicphasetransitionofarc-sprayedcoatingpreparedbythewirescombinationofaluminum-cathodeandsteel-anodeYongxiongChen*,XiubingLia
2、ng,ShichengWei,YanLiu,BinshiXuNationalKeyLaboratoryforRemanufacturing,AcademyofArmoredForcesEngineering,Beijing100072,ChinaARTICLEINFOABSTRACTArticlehistory:Amethodtoprepareintermetalliccompositecoatingsemployingthecost-efficientelectricarcsprayingReceived2December2008twinwiresassistantwithsuitabl
3、eheattreatmentwasdeveloped.Inthisstudy,aFe–AlcompositeReceivedinrevisedform25May2009coatingwasproducedbysprayingtwinwires,i.e.acarbonsteelwireastheanodeandanaluminumwireAccepted27May2009asthecathode.Theinter-depositedFe–Alcoatingwastransformedin-situtoFe–AlintermetallicAvailableonline6June2009com
4、positecoatingafterapostannealingtreatment.Theeffectofannealingtreatmentconditionsonphasecomposition,microstructureandmechanicalpropertiesofthecoatingwasinvestigatedbyusingPACS:XRD,SEM,EDSandOMaswellasmicrohardnesstester.Theresultsshowthatthedesirableintermetallic64.70.Kb81.20.nphasessuchasFe2Al5
5、,FeAlandFe3Alareobtainedundertheannealingcondition.Themainoxideinthe81.40.zcoatingisFeOwhichcanpartiallytransformtoFe3O4uptotheannealingcondition.CrownCopyrightß2009PublishedbyElsevierB.V.Allrightsreserved.Keywords:Twin-wireelectricarcsprayingHeattreatmentIronaluminideCompositecoatingIronoxide1.
6、IntroductionAmongtheavailablethermalsprayingmethodsforproducingcoatingsornet-shapeforming,twin-wireelectricarcspraying,asIronalumindeintermetallicalloysareattractivecandidatesforoneofthemostcost-effectivetechniques,hasbeenwidelyuseinhightemperatureenvironmentsbecauseoftheirlowcost,acceptedinindus
7、try.UnliketheHVOForAPSprocess,theelectriclowdensityandavailabilityofrawmaterialswithgoodcorrosionarcsprayingusestwometalwiresasthefeedstock,namelytheandoxidationresistance[1–5].Nevertheless,industrialapplica-materialto
