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等离子喷涂热障涂层残余应力的实验与模拟研究(英文).docx

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等离子喷涂热障涂层残余应力的实验与模拟研究(英文) ExperimentalandSimulationStudyonResidualStressesinPlasmaSprayedThermalBarrierCoatings Abstract: Thermalbarriercoatings(TBCs)arewidelyusedinhigh-temperatureapplicationstoprotecttheunderlyingmaterialsfromthermalfatigueandoxidation.Thedepositionprocess,suchasplasmaspraying,introducesresidualstressesinTBCs,whichcanaffecttheirperformanceanddurability.Inthisstudy,weinvestigatetheresidualstressesinplasmasprayedTBCsthroughbothexperimentalandsimulationapproaches.TheexperimentalmeasurementsareconductedusingX-raydiffractionandthesimulationisperformedusingfiniteelementanalysis.TheresultsshowthattheresidualstressesinTBCsareinfluencedbyvariousfactors,includingthedepositionparameters,coatingmaterialproperties,andsubstratecharacteristics.ThefindingsofthisstudyprovidevaluableinsightsintotheunderstandingandoptimizationofTBCsforenhancedperformanceinhigh-temperatureapplications. 1.Introduction: Thermalbarriercoatings(TBCs)havegainedsignificantattentioninvariousengineeringapplicationsduetotheirabilitytoprovideaprotectivelayeragainstthermalfatigueandoxidation.Thesecoatingsarecommonlyusedinindustriessuchasaerospace,powergeneration,andautomotive.TheplasmasprayingtechniqueiswidelyemployedforthedepositionofTBCs,whichinvolvestheinjectionofmoltenorsemi-moltenpowdersontoasubstrate.However,thedepositionprocessresultsintheintroductionofresidualstressesintheTBCs,whichcanaffecttheirmechanicalandthermalproperties.Therefore,understandingtheresidualstressesinTBCsiscrucialfortheoptimizationoftheirperformanceanddurability. 2.ExperimentalMethod: Inthisstudy,TBCsampleswerepreparedusingtheplasmasprayingtechnique.Thedepositionparameters,includingthespraydistance,sprayangle,andpowderfeedrate,werevariedtoevaluatetheireffectsontheresidualstresses.X-raydiffraction(XRD)wasemployedtomeasuretheresidualstressesintheTBCsamples.TheXRDanalysiswasperformedusingastandardizedstressmeasurementmethod,suchasthesin^2ψtechnique.Thesin^2ψtechniqueallowsforthedeterminationoftheresidualstressesbasedonth