沉积入射角度对热障涂层形貌和性能的影响  

Effect of Incident Angle under Deposition on the Morphology and Properties of Thermal Barrier Coatings

作　　者：张彬 蔡妍 张涛 常振东 曾令玉 牟仁德 ZHANG Bin;CAI Yan;ZHANG Tao;CHANG Zhen-dong;ZENG Ling-yu;MU Ren-de(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;AECC Shenyang Aero Engine Research Institute,Shenyang 110015,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]中国航发沈阳发动机研究所,辽宁沈阳110015

出　　处：《真空》2023年第3期5-11,共7页Vacuum

基　　金：国家科技重大专项(J2019-Ⅵ-0002-0115)

摘　　要：采用真空电弧镀(ARC)技术在DZ125合金基体上制备NiCrAlYSi(HY3)金属粘结层,然后采用电子束物理气相沉积(EB-PVD)技术,分别以0°、20°、40°、60°和80°五种入射角度沉积氧化钇稳定氧化锆(6~8YSZ)陶瓷涂层,研究了入射角度对涂层形貌和性能的影响。结果表明:五种入射角度的热障涂层均能形成柱状晶结构,随着入射角度增加,孔隙率和柱状晶倾斜角度均逐渐增加,涂层厚度逐渐减小;对带涂层试样进行结合强度测试,入射角度0°~40°时涂层的结合强度均在55MPa以上,入射角度增加到80°时,结合强度降低到15.7MPa;热冲击条件下,陶瓷面层和基体之间形成TGO,由于不同入射角度下涂层孔隙率不同,TGO生长速度不一致,导致其热冲击寿命存在明显差异,入射角度为0°~40°时涂层的热冲击寿命均超过4000次,入射角度为60°时涂层的热冲击寿命为3371次,入射角度为80°时涂层的热冲击寿命最短,仅为1836次。The NiCrAlYSi(HY3)metal-bonded layer was prepared on the DZ125 alloy substrate by vacuum arc plating(ARC),and then the yttrium oxide stabilized zirconia(6-8YSZ)ceramic coatings were deposited by electron beam physical vapor deposition(EB-PVD)at five incidence angles of 0°,20°,40°,60°,and 80°,respectively.The effect of incident angle on the morphology and properties of the coating was studied.The results show that the thermal barrier coatings with five incidence angles can form columnar crystal structure,and the porosity and columnar crystal tilt angle gradually increase with increasing incidence angles,while the coating thickness gradually decreases.The bonding strength of the coated specimens was tested,and the bonding strength is above 55MPa at the incidence angles of 0°to 40°,and decreases to 15.7MPa when the incidence angle increasing to 80°.Under the thermal shock conditions,TGO is formed between the ceramic surface layer and the substrate.The porosity of the coating is different at different incidence angles,and the growth rate of TGO is inconsistent,resulting in significant differences in the thermal shock life.The thermal shock life of the coating at the incidence angles of 0°to 40°exceeds 4000 times,while that of the coating at the incidence angle of 60°is 3371 times and the shortest one at the incidence angle of 80°is only 1836 times.

关 键 词：入射角度 电子束物理气相沉积 热障涂层 结合强度 热冲击试验 

分 类 号：TG174.4[金属学及工艺—金属表面处理]