钛铝金属间化合物表面耐磨陶瓷涂层试验研究

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1、南京航空航天大学硕士学位论文钛铝金属间化合物表面耐磨陶瓷涂层试验研究姓名：海克飞申请学位级别：硕士专业：机械制造及其自动化指导教师：黄因慧20080101钛铝金属间化合物表面耐磨陶瓷涂层试验研究AbstractTiAlintermetalliccompoundbasedalloysarenewtypehightemperaturestructuralmaterialsappliedforaerospaceandaircraftindustriesbecauseoftheirlowdensity,highstrengt

2、handgoodcreepresistance.However,itslowhardnessandpoorwearresistancehavebeenrestrictingitsapplication.ThepurposeofthispaperistoseekappropriatecoatingmaterialsystemtoimprovethewearresistanceofTiAlalloysandstudytheeffectsoflaserremeltingandnanostructuredagglomerat

3、edpowderstothemicrohardnessandwearresistance.ofcompositeceramiccoatingspreparedbyplasmaspraying.Meanwhile,theirmorphologyandmicrostructurewereresearch.Theexperimentalresultswillprovidethenecessarytestsandtheoreticalfoundationforpreparingthehigh-performancenanos

4、tructuredcompositeceramiccoatingsonTiAlsurface.Theconclusionsaredrownasfollowing:(1).AT13/YPSZmicron/nano-ceramiccompositepowderasrawmaterialsforplasmaspraying,adjustmentprocessparametersaboutplasmaspraying,preparationofanano-structuredcompositeceramiccoating.(

5、2).CladdingremeltingwhichrawmaterialsasAT13/YPSZmicron/nano-ceramiccompositepowder,preparationofanexcellentwearresistanceoftheceramiccoating,exploringtheimpactaboutlaserremeltingtothethermalspraycoatingmicrostructure,hardnessandwearresistance.(3).Evaluatingthew

6、ear-resistanceofcompositecoatingatroomtemperatureandundertheconditionsofhightemperatureandanalysisofthewearmechanism.Keywords:TiAlintermetalliccompoundbasedalloys,plasmaspraying,laserremelting,compositeceramiccoatingmicrostructure,wear-resistanceII南京航空航天大学硕士学位论

7、文图、表清单图1.1等离子喷涂原理...............................................................................................10图1.2激光熔覆原理示意图.......................................................................................11图1.3各种激光热加工方法的激光功率及激光作用时间....................

8、...................12图2.1NiCoCrAl+2Y2O3合金粉末SEM形貌...........................................................19图2.2陶瓷粉末的SEM形貌(a)(b)AT13粉末(c)(d)n-AT13粉末.......................2