电子束物理气相沉积热障涂层抗高温腐蚀性能的研究

:2001212210::,,1961,,,,111,21(11100083;21110016):MCrAlY.3,950,.NiCoCrAlY,YSZNiCoCrAlY,.::TG172182:A:100524537(2002)02200842041(TBCs),,,,.,100,20%[1].,[2,3].,,.,,,.,NaS,Na2SO4.,,,.,,NaS.,,NaS,.MCrAlY,3NaSO4,.2GH140(1),NiCoCrAlY[2,4].1050,TG328A(0.1mg)100h.300,Na2SO4,,Na2SO42mg/cm2.950,100h.Na2SO4950,20h,,,,.,Na2SO4,,20h,.SEM/EDXSXRD.,XRD.3131050.,,3,10h,,,NiCoCrAlY30h,.100h,30172mg/cm2,0.45mg/cm20.38mg/cm2.Wagner:3:Table1Thecompositionofsuperalloy(mass%)ElementsCrFeTiMoMnSiCWNiNominal22330182130160170106115Bal.22220024JournalofChineseSocietyforCorrosionandProtectionVol122No14Apr12002©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.Fig.1Isothermaloxidationkineticsforthesamplesoxidizedat1050inairFig.2Isothermalhotcorrosionkineticsat950forthesamplessprayedwithNa2SO4KP1=6.0610-13g2cm-4s-1KP2=3.58310-13g2cm-4s-1KP3=2.94410-13g2cm-4s-1,3,,,NiCoCrAlY.F.Scott[5],Al2O3100010-13,,NiCoCrAlY,NiCoCrAlY,,.,NiCoCrAlY,,,NiCoCrAlYCr2O3Co(CrAl)2O4[6],,(logPO224105Pa)CrO3[7].,,,Al2O3,,.2Na2SO4950100h-.YSZNiCoCrAlY,100h,2.5mg/cm2,YSZ111mg/cm20.85mg/cm2.:(1)(1),,NiCoCrAlY,NiCoCrAlY.(2)3,;3,,,YSZNiCoCrAlY.NiCoCrAlY,NiCoCrAlY,,3.NiCoCrAlY50m(3a).EDXS,,AlCr7.9%18.5%.100h(3b),10mAl2O3,.,Al,Al20%,Al2O3,Al,Al;Cr,Cr5%,Cr2O3OCrO3.,20h,SNiCoCrAlY,S5%.,,X,Ni2S3.180h(9)4.YSZ10m,,A1(at%):Cr:7.71S:13.32Na:3.23O:65.39Ni:7.64.,,.,Na2SO4200h(10),/.,.300h5.Al2O3-YSZ20m,.,,.EDXS,SNaO,Cr.,,Na2SO4Al2O3-YSZ,.582:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.Fig.3Cross-sectionSEMimagesandtheelementdistributionsfortheNiCoCrAlYcoating(a)as-depositedand(b)afterhotcorro2sionat950Fig.4Cross-sectionSEMimageforthetwo-layeredTBCsaftercyclichotcorrosionfor180hFig.5Cross-sectionSEMimagefotthegradientTBCsaftercyclichotcorrosionfor300h45,,,,S.CrNaSO,Cr2(SO4)3Na2CrO4.Na2CrO4[8],,.Cr,.,NiCoCrAlYCr20mass%,,CrCrO3,Cr(5%,3),Na2CrO4.,,Cr,Na2SO4,Cr,Na2SO4,.NiCoCrAlY,.EB-PVD,,.,.Na2SO4,.,,,/,.,,/.,,,CrCrO3.Al2O3,Cr2O3Na2SO46822©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,Cr2(SO4)3Na2CrO4,CrO2-4,Al2O3Na2SO4,.4(1)1050,3.,Al2O3,,100h,0.38mg/cm2.(2)950,.,,,NiCoCrAlY.YSZNiCoCrAlY.(3),200h(10),300h(15),.:[1]JamaraniF,KorotkinM.Compositionallygradedthermalbarriercoatingsforhightempreatureaerogasturbinecomponents[J].Surf.Coat.Technol.,1992,54/55:58[2]BiXiaofang,XuHuibin,GongShengkai.InvestigationoffailuremechanismofthermalbarriercoatingspreparedbyEB-PVD[J].Surf.Coat.Technol.,2000,130:122[3]MovchanBA,MarinskiGS.Gradientprotectivecoatingsofdiffer2entapplicationproducedbyEB-PVD[J].Surf.Coat.Technol.,1998,100-101:309[4]XuHuibin,GuoHongbo,LiuFushun,GongShengkai.Developmentofgradientthermalbarriercoatingsandtheirhot-fatiguebehavior[J].Surf.Coat.Technol.,2000,130:133[5]StottFH,WoodGC.Astudyonhot-corrosionofplasmasprayedthermalbarriercoating[J].Oxid.Met.,1995,4(1/2):113[6]GuoHongbo,GongShengkai,ZhouChungeng,XuHuibin.Investiga2tiononhot-fatiguebehaviorsofgradientthermalbarriercoatingsbyEB-PVD[J].Surf.CoatTechnol.,2001,148:110-116(SCI)[7]GuoHongbo,XuHuibin,GongShengkai.Oxidationandhot-corro2sionofgradientthermalbarriercoatingspreparedbyEB-PVD[J].J.Mater.Sci.Technol.,inpress.[8]RappRobertA.Chemistryandelectrochemistryofhotcorrosionofmetals[J].MaterialsScienceandEngineering,1987,87:319INVESTIGATIONOFHIGHTEMPERATUREHOTCORROSIONBEHAVIOROFTHERMALBARRIERCOATINGSPREPAREDBYEB-PVDBIXiaofang1,GUOHongbo1,GONGShengkai1,2,XUHuibin1(11DepartmentofMaterialsScienceandEngineering,BeijingUniversityofAeronauticsandAstronautics,Beijing100083;21StateKeyLab.forCorrosionandProtection,Shenyang110016)Abstract:HightemperatureoxidationandhotcorrosionbehaviorsofMCrAlYcoating,thermalbarriercoatings(TBCs)andgradientthermalbarriercoatingspreparedbyelectronbeamphysicalvapordeposition(EB-PVD)havebeeninvestigated.Althoughthesecoatingsshowedexcellentoxidationbehavior,themassgainforMCrAlYcoatingswaslargerafterbeingsprayedwitha2mg/cm2de2positofNa2SO4andtestedat950.ThelowermassgainforTBCsandGTBCsindicatedthattheceramiccoatinghasabenefittoim2provethehotcorrosionbehavior.However,thermalcycliclifetimeforTBCsandGTBCsdecreasedduringhotcorrosiontesting.Keywords:EB-PVD,gradientthermalbarriercoating(GTBC),hightemperatureoxidation,hotcorrosion782:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.