EBPVD热障涂层热循环过程中粘结层的氧化和相结构

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1、维普资讯http://www.cqvip.com第38卷第1期金属学歧Vol38No12002年1月79—83贞ACTAMETALLRGICASINICAJan．2002pp7983EB—PVD热障涂层热循环过程中粘结层的氧化和相结构李吴妲】孙晓峰)张重远宫声凯。·胡望宇。管恒荣)胡壮麒1)中国科学院金属研究所沈阳1100162)E京航空航天人学材料科学与1：程学院．北京1000833)湖南大学材料科学与工程学院．长沙410082摘要采用磁控溅射方法在镍基单晶高温台金基体乖5Ni30Cr12A103Y(岙量分数．％】帖结昙采甩电求劫理气相沉积方法(EBPVD1沉积7％

2、Y203(质量分数卜ZrO2陶瓷厦层结果表明在热循环过程中非平衡柏ZrO2中的YaOa含量逐渐减步LZrO2相逐渐丹解成平衡相tZr02(砖却时套转变成堇斜相)和相ZrO21050循环200捉．粘结层氧化物(A12Oa】厚度约为3m，表田NiCr～A1Y适宜作粘结层继续热循环冉瓷层巾出单斜相蚺结山Al贫化．氧化层中出现NiO厦尖晶石等，引起应力集中导致}泉暑失效关键词热障徐层，粘结层氧化，相变，热循环中圉法分类号TGI461．TG11312文献标识码A文章编号O4121961(2002)01—0079-050XIDAT10NANDPHASESTRUCTURE0FTHE

3、B0NDC0ATINEB—PVDTHERMALBARRIERC0ATINGSDURINGTHERMALCYCLINGL1Meihengn．SUNXiao／engu．zHANGZhongyuan”．GONGShengkaiHUWangyu．GUANHeng'~ngHUzh．uangqiL1)lnstitateofMetalIZese~chTheChineseAcademyofSciences，Sheny~g1100162)CollegeofMaterialsScienceaⅡdEngineering．DeijingUniversityofAeronauticsandAs

4、tronautics，Beijing1000833)CollegeofMateriaLsScienceandEnginering，HunanUniversity,Changsha410082Correspondent：LIMeihen．g，?(024)23843531．55432．Fax：(024)23891320．E-mail：lime．ih．en9@hotmailc0mManuscriptreceived2001~1528．inrevisedform2001．3827ABSTRACTAfterdepositingNi3OCr12Al03YfYnas$fractio

5、n％1bondcoatonaNibasesinglecrystalsuperalloybymagnetronsputteringaceramictopcoat(7％YaOsZr02)wasdepositedbyelectronbeamphysicalvapordeposition(EBPVD)．Dm'ingthermalcyclestheY2O3contentinnonequilibritmlphasestsZrO2decreasedgraduallyandthetsZrO2decomposedgraduallytoequilibriuint-Zr02(transfo

6、rmingtomonoclinicphaseaftercooling)andcubicZrO2phaseAfter200thermalcycles，thethermallygrownoxides【TGO1layervdth3#nathicknessconsistsofA12O3exclusively，indicatingthatthesputteredNiCrA1YcoatingissuitableasbondcoatforEBPVDthermalbarriercoatingsWithincreasingthermalcycles，asmallamountofmono

7、clinic77lZrO2formedfrorntZrO2Alwasdepleted，andNiOandNi(A1Cr)2O4formednearthejnterfacebet~eenTGOandbondcoalStressconcentrationduetooxidegrowthandphasetransforlnationbetweent-771ZrO2wouldweakenthecombinationbetweentopandbondcoats．andthencausethermalbarriercoatingtospallfl-onlthes