鈦合金表面熱障涂層的制備及其性能研究.pdf

1、長(zhǎng)沙理工大學(xué)碩士學(xué)位論文鈦合金表面熱障涂層的制備及其性能研究姓名：曾水冰申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：應(yīng)用化學(xué)指導(dǎo)教師：曹學(xué)強(qiáng)；楊道武；朱玲201205ABSTRACTTitaniumalloysallveryimportantlightweightconstructionmaterialsTheyhavebroadapplicationsinaviation，andaerospace；andalwayshavebeenaresearchfo

2、cusinthefieldofmaterialsHowever，thehightemperatureperformanceoftitaniumalloyisrelativelypoor；therefore，researchesarecarriedoutonhightemperatureprotectiontechniqueontitaniumalloyactivelyThermalbarriercoatings(TBCs)areoneo

3、ftheadvancedhightemperatureprotectivecoatings，andthestateofartthermalbarriercoatingmaterial8YSZhasbeensuccessfullyappliedtotheprotectionofaircraftenginecombustionchamberandotherhightemperaturepartsHowever，littleresearchh

4、asfocusedontheoxidationresistance，mechanicalpropertiesandthermalpropertyof8YSZcoatingsontitaniumalloyThemainpurposeofthisstudyistofabricate8YSZTBCsontitaniumalloysurface，studytheoxidationresistance，thermalinsulationandth

5、ermalshockresistanceperformanceofTBCsontitaniumalloyCoNiCrAIYbondcoatand8YSZceramictopcoatalldepositedontitaniumalloysurfacebyatmosphericplasmaspraying(APS)Inordertoresearchtheinfluenceofbondcoatontheperformanceofcoating

6、，TBCswithoutbondcoatontitaniumalloysurfacewerealsodepositedTheperformanceofoxidationresistance，thermalinsulationandthermalshockresistanceofTBCsatdifferenttemperaturesandtheirfailurebehaviorwerestudiedandanalyzedMechanica

7、lpropertiesofcoatingssuchassurfaceroughness，microhardnessandadhesionstrengthwerealsotestedinthispaperTheperformanceofmicrohardnesshasimprovedgreatlyaftersprayingTBCsontitaniumalloyandtheadhesionstrengthbetweentitaniumall

8、oyandcoatingsiswellThethermalinsulationeffectofsamplewithbondcoatorwithoutbondcoatisalmostthesameThesurfacetemperatureishigherthegreaterthetemperaturedifferencebetweencoatingandsubstrateWithoutdoubt，the8YSZceramictopcoat

9、hasadvantageofprovidingthermalprotectionfortitaniumalloy8YSZceramictopcoatandCoNiCrAIYbondcoathavealayeredstructureontitaniumalloysurfaceItisobviousthatthemicrohardnessof8YSZceramiclayerismuchhigherthanthatofsubstrateThe