Residual Stress and Stability of Thermal Barrier Coatings during Cyclic Thermal Loading

摘要：

　　The residual stress accumulation of thermal barrier coatings (TBC) during thermal cycling has been simulated by thermal elastic-plastic finite element method.Stability process of thermal barrier coatings during thermal cycling is studied by Melans static shakedown theorem considering thermal gradients and thermal expansion misfit.The influences of the interfacial morphology of top coat / bond coat (TC/BC) on residual stress and stability process are analyzed.Thus,the residual stress and stability process are affected remarkably by interfacial topography between TC and BC.Accidented interface cause the sudden change of the interracial residual stress which is harmful to interface bonding intensity and stabilization.It is useful information for studying of the life and final spallation of TBC system.

关键词： Thermal barrier coatings Residual stress Stability

作者: Xu Yingqiang Gao Xiya Yuan Yuan Wang Zhenlong Zhou Ren Lv Guozhi

作者单位: School of Mechanical Engineering,Northwestern Polytechnical University,Xian 710072,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 1344-1346

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）