强流脉冲电子束作用下多弧离子镀NiCoCrAlYSiHf涂层改性机理及循环氧化行为研究  

Modification Mechanism and Thermal Cycling Oxidation Behavior of Arc Ion Plated NiCoCrAlYSiHf Coating Irradiated via High-Current Pulsed Electron Beam

作　　者：蔡杰[1,2] 姚逸铭 高杰 关庆丰[3] CAI Jie;YAO Yiming;GAO Jie;GUAN Qingfeng(Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Zhenjiang 212013,China;School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China;School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学先进制造与现代装备技术工程研究院,镇江212013 [2]江苏大学机械工程学院,镇江212013 [3]江苏大学材料科学与工程学院,镇江212013

出　　处：《航空制造技术》2022年第17期117-126,共10页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金民航联合基金(U1933124);中国博士后科学基金(2021M701476)。

摘　　要：利用强流脉冲电子束(HCPEB)技术对NiCoCrAlYSiHf涂层进行辐照处理,对改性前后涂层表面状态(粗糙度、宏观形貌)和微观结构(相组成、晶体缺陷和活性元素分布)进行表征,并对改性前后涂层1100℃循环氧化性能进行研究。微观表征结果表明,脉冲电子束改性后原始涂层制备缺陷消失,涂层表面平整致密,并形成丰富的变形结构及均匀分布的活性元素析出相;循环氧化结果表明,改性态涂层在循环过程中热生长氧化物(TGO)具有更优异的化学稳定性,脉冲电子束改性技术能够显著延缓TGO开裂剥落现象,提高涂层抗热循环性能。The NiCoCrAlYSiHf coatings were modified via high-current pulsed electron beam(HCPEB)in this contribution.The surface state(surface roughness and macro morphology)and microstructures(phase composition,crystal defects,and reactive element distribution)of the original and irradiated coatings were comparatively characterized.Thermal cycling tests at 1100℃were also performed.Microstructural characterization results show that preparation defects of the original coating are eliminated,and the irradiated coating surface becomes smooth and dense.In addition,abundant plastic deformation structures and uniformly distributed reactive element precipitates(nano-sized)can be observed.These irradiated effects can ensure the chemical stability of the thermally grown oxide(TGO)during the cycling process and significantly delay the cracking and spallation of TGO.The thermal cycling resistance of the irradiated coatings is improved significantly.

关 键 词：强流脉冲电子束(HCPEB) NiCoCrAlYSiHf涂层 微观结构 循环氧化 热生长氧化物(TGO) 

分 类 号：TG174.4[金属学及工艺—金属表面处理]