Ti-,2-AlC-TiAl復(fù)合材料抗氧化性能研究.pdf

1、濟南大學(xué)碩士學(xué)位論文TiAlCTiAl復(fù)合材料抗氧化性能研究姓名：趙娜申請學(xué)位級別：碩士專業(yè)：材料物理與化學(xué)指導(dǎo)教師：岳云龍20090520濟南大學(xué)碩士學(xué)位論文AbstractTi2AIC／TiAIcompositematerialhaveattractedmuchscientificresearchinterestasidealcandidatematerialsforhightemperaturestructuralapplicat

2、ionsduetotheirlowdensityhighspecificstrength，highspecificstiffnessandhightemperaturestrengthratioTheproblemofpoorductilityofthesematerialsatroomtemperaturehasbeenmostlysolvedbYalloying(Nb，B)andmicrostructurecontrollingHo

3、wevertheinsufficientoxidationresistancelimitstheirapplicabletemperatttre，whichalsoseriouslyreducestheirperformanceadvantagesVacuumSinteringFunaceWasusedtofabricateTi2A1C／TiAlinsitureactioncompositesTi2AIC／TiAl(Nb，B)compo

4、siteswereheatedbythemethodofrapidheatingheattreatmentWehadobservedthemicrostructureofTi2A1C／TiAIcompositematerialsandstudiedoxidationresistanceTheoxidationresistancepropertieswerestudiedbythemethodofaddingweight，XRD，SEM，

5、EPMAanalysismethodswereusedtostudysurfaceandoxidescrosssectionofoxidationsamplesComparedoxidelayerofTi2A1C／TiAI(Nb，B)compoundmaterialsbeforeandafterheattreatmentstudyedoxidationresistanceofTi2AIC／TiAl(Nb，B)compoundmateri

6、alsafterheattreatment，themicrostructuretheTi2A1C／TiAI(No，B)afterheattreatmentistinyandcompact，theoxidelayeristhin，Ti02andtheA1203mixoxidelayerisformed，hadnotformedthesoleA1203oxidelayerObviouslyoxidationresistanceoftheTi

7、2A1C／TiAI(Nb，B)thecompoundmaterialsafterheattreatmenthadimproved；ButtheformationproductoftheoxidelayerdidnotchangeTheTi2AIC／TiAI(Nb，B)compositematerialsweretreatedbyrapidheatingheattreatment，theresultsshowedthattheoxidat

8、ionresistanceofTi2A1C／TiAl(Nb，B)compositecouldbeenhancedbyimprovingtheadhesionoftheoxid—ationcoating，mainlybecausethegrainsizechangesissmallaftertheheattreatment，easilyreleasestressthroughslowchangeinoxidefilm，andtheprot