摘要
为解决YSZ(Y_(2)O_(3)部分稳定的ZrO_(2))陶瓷基高温封严涂层沉积效率较低和易于过早剥落失效的问题,选择氧化铝(Al_(2)O_(3))、钇铝石榴石(Y_(3)Al_(5)O_(12),YAG)及镁铝尖晶石(MgAl_(2)O_(4))为三种高温黏结相,通过喷雾造粒的方法分别制备出B0(无黏结相)、B1(含Al_(2)O_(3))、B2(含YAG)和B3(含MgAl_(2)O_(4))等四种YSZ基团聚颗粒,研究黏结相对涂层沉积效率和热循环性能的影响。结果表明,YAG的黏附和包裹作用最强,与B0型粉末相比,B2型粉末的沉积效率提高了181.49%;热循环过程中不断增长的裂纹扩展驱动力和陶瓷材料的脆性属性是导致陶瓷涂层剥落失效的主要原因,由于YAG相的弥散增韧作用,B2型涂层的断口呈现出类韧窝形貌,与B0型涂层相比,B2型涂层的断裂韧性提高了39.76%,热循环寿命提高了43.68%。YAG黏结相的添加显著地提高了YSZ陶瓷基高温封严涂层的沉积效率,同时较好地提高了涂层的热循环寿命。
In order to solve the problems of low deposition efficiency(DE)and premature spalling failure of YSZ(Y_(2)O_(3) partially stabilized ZrO_(2))-based high temperature sealing coating,four types of YSZ-based agglomerated powder containing no bonding phase,Al_(2)O_(3),yttrium aluminum garnet(YAG),and MgAl_(2)O_(4),respectively,labeled as B0,B1,B2,and B3,which are prepared by spray granulation.Effects of bonding phases on DE and thermal cycling performance of YSZ-based sealing coating by atmospheric plasma spraying(APS)are analyzed.The results show that,YAG has the strongest adhesion effect and wrapping effect,compared with B0 powder,the DE of B2 powder is increased by 181.49%.The growing driving force of crack propagation and the brittleness of ceramic materials during thermal cycling are the main reasons for the spalling failure of ceramic coatings.Due to the dispersion toughening effect of YAG phase,the fracture of B2 coating presents a dimple-like morphology.Compared with B0 coating,the fracture toughness of B2 coating is increased by 39.76%and the thermal cycle lives are increased by 43.68%.The addition of YAG phase significantly improves the DE of YSZ-based high temperature sealing coating,and effectively improves the thermal cycle lives of the coating.
作者
程涛涛
王志平
戴士杰
王仕成
邢思佳
马祥
CHENG Taotao;WANG Zhiping;DAI Shijie;WANG Shicheng;XING Sijia;MA Xiang(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,China;Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance,Civil Aviation University of China,Tianjin 300300,China;Engine Overhaul Department,Aircraft Maintenance and Engineering Corporation,Beijing 100621,China)
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2021年第6期102-113,共12页
China Surface Engineering
基金
天津市教委自然科学研究(2020KJ030)
中央高校基本科研业务费(3122020057)资助项目
关键词
黏结相
YSZ基高温封严涂层
沉积效率
热循环性能
bonding phase
YSZ-based high temperature sealing coating
deposition efficiency
thermal cycling performance
