预览加载中，请您耐心等待几秒...

包渗工艺制备TiAl合金表面Si-Y共渗层的组织和抗高温氧化性能（英文）.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

包渗工艺制备TiAl合金表面Si-Y共渗层的组织和抗高温氧化性能（英文） Title:MicrostructureandHigh-temperatureOxidationResistanceofSi-YCo-dopedSurfaceLayerProducedbyPackCementationTechniqueonTiAlAlloy Abstract: TiAlalloyshavegainedsignificantattentionintheaerospaceandautomotiveindustriesduetotheirremarkablehigh-temperaturemechanicalproperties.However,thepooroxidationresistancelimitstheirpracticalapplicationsatelevatedtemperatures.Inthisstudy,aSi-Yco-dopedsurfacelayerwaspreparedonaTiAlalloyusingthepackcementationtechnique.Themicrostructureandhigh-temperatureoxidationresistanceoftheSi-Yco-dopedsurfacelayerwereinvestigated. Introduction: TheSi-Yco-dopedsurfacelayerisapromisingtechniquetoenhancetheoxidationresistanceofTiAlalloys.SicanformaprotectiveSiO2scale,whileYcanstabilizetheoxidescalesandimproveadhesion.ThepackcementationtechniqueisaneffectivemethodtoachieveSi-Yco-dopingduetoitssimplicityandlowcost.Thisstudyaimstoinvestigatethemicrostructureandhigh-temperatureoxidationresistanceoftheSi-Yco-dopedsurfacelayeronTiAlalloy. ExperimentalProcedure: 1.PreparationofTiAlSubstrates:TiAlsampleswerecutintoappropriatesizesandpreparedbygrinding,polishing,andultrasoniccleaning. 2.PackCementationProcess:TheSi-Yco-dopedsurfacelayerwaspreparedbypackcementationusingYandSipowders. 3.HeatTreatment:TheTiAlsampleswithSi-Yco-dopedsurfacelayerwereheat-treatedinavacuumfurnaceat1000°Cfor5hours. 4.MicrostructuralCharacterization:ThemicrostructureoftheSi-Yco-dopedsurfacelayerwasexaminedusingscanningelectronmicroscopy(SEM)andX-raydiffraction(XRD). 5.High-TemperatureOxidationTest:TheSi-Yco-dopedTiAlsampleswereoxidizedathightemperatures(800-1000°C)foracertainperiodoftime.Theweightgainandoxidescalemorphologywereanalyzed. ResultsandDiscussion: TheSEMimagesrevealedthattheSi-Yco-dopedsurfacelayerexhibitedacompactmicrostructurewithoutvisiblecracksorpores.TheXRDanalysisconfirmedtheformationofTi-Si-Ycompounds,Ti5Si3,andY2O3phasesonthesurfacelayer.TheSi-Yco-dopedsurfacelayersignificantlyimprovedthehigh-temperatureoxidationresistanceoftheT