中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
z1期
29-35
,共7页
热障涂层%空气等离子喷涂%垂直裂纹%热稳定性
熱障塗層%空氣等離子噴塗%垂直裂紋%熱穩定性
열장도층%공기등리자분도%수직렬문%열은정성
thermal barrier coating%air plasma spray%vertical type crack%thermal durability
采用循环热暴露及热震试验研究含或不含垂直裂纹的厚热障涂层的热稳定性和失效机制。先采用空气等离子喷涂技术在基体表面制备150μm厚的连接涂层，再在该涂层上采用空气等离子喷涂技术制备2000μm厚的热障涂层。含或不含垂直裂纹的热障涂层的粘附强度分别为24.7和11.0 MPa，表明含垂直裂纹的热障涂层的界面稳定性更高。循环热暴露及热震试验表明其热稳定性更高。含或不含垂直裂纹的热障涂层的硬度分别为6.6和5.3 GPa，经循环热暴露试验后分别升高至9.5和5.5 GPa。实验表明上层涂层中垂直裂纹的存在有利于延长热障涂层高温环境的寿命。
採用循環熱暴露及熱震試驗研究含或不含垂直裂紋的厚熱障塗層的熱穩定性和失效機製。先採用空氣等離子噴塗技術在基體錶麵製備150μm厚的連接塗層，再在該塗層上採用空氣等離子噴塗技術製備2000μm厚的熱障塗層。含或不含垂直裂紋的熱障塗層的粘附彊度分彆為24.7和11.0 MPa，錶明含垂直裂紋的熱障塗層的界麵穩定性更高。循環熱暴露及熱震試驗錶明其熱穩定性更高。含或不含垂直裂紋的熱障塗層的硬度分彆為6.6和5.3 GPa，經循環熱暴露試驗後分彆升高至9.5和5.5 GPa。實驗錶明上層塗層中垂直裂紋的存在有利于延長熱障塗層高溫環境的壽命。
채용순배열폭로급열진시험연구함혹불함수직렬문적후열장도층적열은정성화실효궤제。선채용공기등리자분도기술재기체표면제비150μm후적련접도층，재재해도층상채용공기등리자분도기술제비2000μm후적열장도층。함혹불함수직렬문적열장도층적점부강도분별위24.7화11.0 MPa，표명함수직렬문적열장도층적계면은정성경고。순배열폭로급열진시험표명기열은정성경고。함혹불함수직렬문적열장도층적경도분별위6.6화5.3 GPa，경순배열폭로시험후분별승고지9.5화5.5 GPa。실험표명상층도층중수직렬문적존재유리우연장열장도층고온배경적수명。
The thermal stability and failure mechanism of thick thermal barrier coatings (TBCs) with and without vertical type cracks were investigated through the cyclic thermal exposure and thermal-shock tests. The TBC systems with thickness of about 2000 μm in the top coat were prepared by an air plasma spray (APS) on the bond coat of about 150 μm in thickness prepared by APS. The adhesive strength values of the as-prepared TBCs with and without vertical type cracks were determined to be 24.7 and 11.0 MPa, respectively, indicating the better interface stability in the TBC with vertical type cracks. The TBC with vertical type cracks shows a better thermal durability than that without vertical type cracks in the thermal cyclic exposure and thermal-shock tests. The hardness values of the as-prepared TBCs with and without vertical type cracks were found to be 6.6 and 5.3 GPa, respectively, which were increased to 9.5 and 5.5 GPa, respectively, after the cyclic thermal exposure tests. These results indicate that the vertical type cracks developed in the top coat are important in improving the lifetime performance of thick TBC in high temperature environment.
