摘要
热障涂层技术作为航空发动机高温热防护的三大核心技术之一,在航空航天材料领域得到了广泛的应用。在热障涂层的服役过程中,热循环作用下TGO生长和界面形貌共同影响着热障涂层中的应力分布和演化规律,而热应力是热障涂层失效和剥落的重要原因。在前期研究的基础上,以正弦波的波长和幅值为热障涂层界面形貌的表征参量,研究了热循环情况下,界面形貌对TGO生长的影响,以及TGO生长和界面形貌耦合作用下热障涂层中的应力分布及演化规律,为控制TGO的生长过程和降低TBCs中的残余应力,提高热障涂层的使用寿命提供一定的理论指导。
Thermal barrier coating(TBCS)technology is one of the three core technologies for high temperature thermal protection of aero-engine and has been widely used in the field of aerospace materials.In the service process of TBCs,TGO growth and interface morphology influence on the stress distribution and evolution of thermal barrier coatings,and thermal stress is an important reason for the failure and spalling of TBCs.Base on the previous studies,this paper discussed the interface topography on the growth of TGO and the stress distribution and evolution where the wavelength and amplitude of sinusoidal wave was considered as the interface topography parameters of thermal barrier coating.This research can provide some theoretical guidance on how to control the growth of the TGO process,to reduce the residual stress in the TBCs and to improve the service life of thermal barrier coatings.
作者
伍杰
朱旺
毛祖莉
WU Jie;ZHU Wang;MAO Zuli(Department of Mechanical Engineering,Hunan Institute of Technology,Hengyang 421001,China;Department of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,China)
出处
《中国陶瓷》
CAS
CSCD
北大核心
2022年第5期35-43,共9页
China Ceramics
基金
湖南省自然科学基金项目(2021JJ30205)
湖南省教育厅重点项目(19A122)
湖南工学院项目(JY201935)。
关键词
热障涂层
热循环
界面形貌
Thermal barrier coating
Thermal cycle
Interface morphology
