表面技术2017，Vol.46Issue(3)：84-90,7.DOI:10.16490/j.cnki.issn.1001-3660.2017.03.012
粘结层预处理对PS-PVD沉积7YSZ热障涂层氧化行为的影响
Effect of Bond Coats Pretreatment on Oxidation Behavior of 7YSZ Thermal Barrier Coating Deposited by Plasma Spray-Physical Vapor Deposition
摘要
Abstract
The work aims to improve resistance to high temperature oxidation of 7YSZ thermal barrier coating deposited by plasma spray-physical vapor deposition.The columnar structure 7YSZ thermal barrier coatings (TBCs) were prepared by plasma spray-physical vapor deposition (PS-PVD) on pretreated (polishing+pre-oxidation) and un-pretreated bond coat surfaces,respectively.The static resistance to high temperature oxidation of 7YSZ thermal barrier coatings was tested in atmospheric environment at 950 ℃.Interfacial morphology of the ceramic layer/bond coat as well as structure evolution of TGO layer during high-temperature oxidation process were characterized by virtue of scanning electron microscope (SEM),X-ray diffractometer and (XRD) and energy dispersive spectrometer (EDS).Polishing of bond coats could reduce parts subject to non-uniform geometric stress and inhibit the formation of micro-crack at the interface of ceramic layer/TGO/bond coats.Meanwhile,the thin and continuous TGO layer formed as a result of pre-oxidation treatment of bond coats could effectively reduce the growth rate of TGO and inhibit the element interdiffusion between ceramic layer and bond coats.The isothermal oxidation kinetic curve of columnar 7YSZ thermal barrier coatings conformed to Wagner parabolic law.The oxidation rate constant of 7YSZ coatings with bond coats pretreated and un-pretreated was 0.101 × 10-12 cm2/s and 0.115 × 10-13 cm2/s,respectively.The pretreated of bond coats can effectively improve the oxidation resistance of 7YSZ thermal barrier coating deposited by plasma spray-physical vapor deposition.关键词
等离子啧涂-物理气相沉积/7YSZ/粘结层预处理/高温氧化/柱状结构/TGO层/结构演变Key words
plasma spray-physical vapor deposition/7YSZ/bond coats-pretreatment/high-temperature oxidation/columnar structure/TGO layer/structure evolution分类
矿业与冶金引用本文复制引用
邝子奇,陈文龙,刘敏,毛杰,邓子谦..粘结层预处理对PS-PVD沉积7YSZ热障涂层氧化行为的影响[J].表面技术,2017,46(3):84-90,7.基金项目
广东省自然科学基金(2016A030312015) （2016A030312015）
广东省科技厅对外科技合作项目(2013B050800031) （2013B050800031）
广东省科技厅工业高新技术攻关引导项目(2013B010102023) （2013B010102023）
广东省科技厅国际科技合作(2014B050502008)Suported by Fundamental Research on Thermal Protection (Grant No.2016A030312015),Development and Application of Technology of Advanced Plasma Spraying (Grant No.2013B050800031),Development and Application of Technology of Advanced High Temperature Protective Coating (Grant No.2013B01010 2023),and Construction of Sino-French Modern Material Surface Engineering Technology International Cooperation Base(Grant No.2014B050502008) （2014B050502008）
