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1、热喷涂条件对热障涂层性能的影响（Theinfluenceofthermalsprayingconditionsonthepropertiesofthermalbarriercoatings）TheinfluenceofthermalsprayingconditionsonthepropertiesofthermalbarriercoatingsE.Arai1e.Wada2k.Kishimoto2N.Ohno3(1)electronicpowderindustryresearchinstitute,Tok
2、yo,Japan;2,Tokyoinstituteoftechnology,Tokyo,Japan;3,plasmatechnologyresearchcompany,Japan'syuzakiEffectofThermalSprayConditiononCharacterizationofThermalBarrierCoatingE.Arai1e.Wada2k.Kishimoto2N.Ohno3(1,CentralResearchInstituteofElectricPowerIndustry,Kom
3、aeCity,Tokyo,Japan;2,TokyoInstituteofTechnology,meguro-ku,Tokyo,Japan;3,PlasmaGikenco.ltd.,TodaCity,Saitama,Japan)Inthispaper,Itiswellknownthatthermalsprayingconditionsaffecttheperformanceofcoatings,suchasporosity,elasticmodulus,thermalexpansioncoefficie
4、nt(CTE),fracturestrengthofcoatings,andbondingstrengthofcoatings.Therefore,theresidualstressandthecoatingstressgeneratedduringthethermalsprayingcoatingareobviouslydifferentfromthethermalsprayingconditions.Theinfluenceofseveralthermalsprayconditionsonthepr
5、opertiesofcoatingswasstudied.Thetypicalthermalbarriercoatingsystemiscomposedofpartiallystablezirconia(chemicalcompositionof8wt%Y2O3-ZrO2)andCoNiCrAlYbondinglayer.Thevelocityandtemperatureoftheflyingparticlesandthetemperatureofthesubstratearechangedwithth
6、echangeofthethermalsprayingprocessparameters.Forceramiccoating,thesystemmeasurestheporosityofthecoating,vickershardness,CTE,elasticmodulus,bendingfracturestrength,fracturetoughnessofthelaminatedlayerandresidualstressofthecoating.1introductionThermalspray
7、ingtechnologyisakindofdepositiontechniques,suchasatmosphericplasmaspraying(APS),thearcspraying(TWA)andsupersonicflamespraying(HVOF),istheuseoftinyparticlesareacceleratedbyhighenergyplasmaorgasflow,makethepoundingofsubstrate,depositionformingdensecoating.
8、However,thermalsprayingconditionsgreatlyinfluencethemechanicalpropertiesofcoatings.Thepropertiesofthesprayparticles,suchastheparticlesize,thetemperatureandspeedoftheflightparticles,andthetemperatureofthesubstrate,directlya
