摘要
热障涂层中陶瓷层界面处的应力应变场对其破坏起到至关重要的作用,但之前的研究并未考虑热障涂层宏观构型与细观界面的交互影响。本文建立了在轴向和周向具有不同波长的3D涂层界面有限元模型,分析了轴向波长和周向波长对涂层界面应力的影响规律,获得了轴向波长和周向波长对涂层界面应力综合影响的关系式。研究结果表明,减小轴向波长会增大涂层界面破坏的风险,增大周向波长能够同时减小周向和轴向的最大应力,有利于降低涂层界面破坏的风险;轴向波长为0.051 mm,周向波长为0.030 mm时,周向最大应力最小,为243.1 MPa;周向波长和轴向波长均大于0.03 mm时,周向与轴向应力差值小于40 MPa,界面应力分布的均匀性较好。本文研究为涂层制备时的界面优化设计提供了理论基础。
The stress-strain field at the interface of the thermal barrier coatings(TBCs)plays a crucial role in its destruction,but previous studies did not consider the interaction between the macroscopic shape of the TBCs and mesoscopic interface morphology.In this paper,a finite element model of 3D TBCs interface with different wavelengths in the axial and circumferential directions is established.Then the influence law of axial wavelength and circumferential wavelength on the TBCs interface stress is analyzed.Finally,the relationship equation of the integrated influence of axial wavelength and circumferential wavelength on the TBCs interface stress is established.The results show that decreasing the axial wavelength will increase the risk of TBCs interface damage.Increasing the circumferential wavelength can reduce the maximum stress in both circumferential and axial directions,which is helpful to reduce the risk of coating interface damage.When the axial wavelength is 0.051mm and the circumferential wavelength is 0.030mm,the maximum circumferential stress is 243.1MPa.When both the circumferential and axial wavelengths are greater than 0.03mm,the difference between the circumferential and axial stresses is less than 40 MPa,and the uniformity of the interfacial stress distribution is good.The research results of this paper can provide new ideas for the research of TBCs and provide the theoretical basis for the interface design when preparing the TBCs.
作者
艾延廷
关鹏
姚玉东
王贺权
包天南
何佳宁
Ai Yanting;Guan Peng;Yao Yudong;Wang Hequan;Bao Tiannan;He Jianing(Shenyang Aerospace University,Shenyang 110136,China;Northwestern Polytechnical University,Xi'an 710072,China)
出处
《热喷涂技术》
2023年第2期90-98,共9页
Thermal Spray Technology
基金
辽宁省教育厅面上项目资助(LJKZ0182)
沈阳航空航天大学校引进人才科研启动基金项目(21YB03)。
关键词
热障涂层
宏观构型
3D涂层界面
涂层破坏
周向波长
thermal barrier coatings
macroscopic shape
3D TBCs interface
TBCs damage
circumferential wavelength
