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FeAl基合金的高温抗氧化性能分析.docx

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FeAl基合金的高温抗氧化性能分析 Introduction: FeAl-basedalloyshavegainedwidespreadresearchinterestovertheyearsduetotheiruniquecombinationofhigh-temperaturemechanicalstrengthandoxidationresistance.TheyareintermetalliccompoundsthatareformedbytheorderedarrangementofFeandAlatoms.Itiswellknownthattheoxidationofmetalsandalloysisanimportantfactorthatlimitstheirapplicationinhigh-temperatureconditions.Hence,thestudyoftheoxidationresistancebehaviorofFeAl-basedalloysisofgreatinteresttomanyresearchers,andthispaperpresentsabriefanalysisofthehigh-temperatureoxidationbehaviorofFeAl-basedalloys. High-temperatureoxidationbehaviorofFeAl-basedalloys: TheoxidationbehaviorofFeAl-basedalloysisinfluencedbyseveralfactorssuchastemperature,thenatureoftheatmosphere,andthealloycomposition.Athightemperatures,anoxidelayerisformedonthesurfaceofthealloy,whichplaysacrucialroleindeterminingtheoveralloxidationresistanceofthealloy.Theoxidelayeractsasabarriertopreventfurtheroxidationofthealloyandtomaintainitsstability.Thecompositionoftheoxidelayerformedisdependentonthenatureofthealloy,thetemperature,andtheatmosphere. TheoxidationresistanceofFeAl-basedalloyscanbeimprovedbyalloyingwithotherelementssuchasCr,Si,andTi.Thisisbecausethesealloyingelementsactasstabilizersoftheoxidelayerandenhanceitsadhesiontothesubstrate.StudieshaveshownthattheadditionofCrtoFeAl-basedalloyscansignificantlyimprovetheiroxidationresistance,mainlyduetotheformationofaprotectiveCr2O3layeronthesurface. Inadditiontoalloying,thesurfacetreatmentofFeAl-basedalloyscanalsosignificantlyaffecttheiroxidationresistance.Forinstance,theuseofcoatingssuchasAl2O3andSiO2canprotectthealloysfromoxidationathightemperatures.Thesecoatingsactasadiffusionbarrier,preventingthediffusionofoxygenatomsintothealloyandtheoutwarddiffusionofmetallicatomsintothecoating. Conclusion: FeAl-basedalloysarepromisingmaterialsforhigh-temperatureapplicationsduetotheirexcellenthigh-temperaturemechanicalstrengthandoxidationresistance.Thehigh-temperatureoxidationresistancebehaviorofFeAl-based