The thermal barrier coatings (TBCs) are serviced in elevated thermal conditions characterized by chemo-thermo-mechanical (C-T-M) failure mechanism and multiscale failure modes. In the present work, isothermal, cyclic thermal and mechanical induced spalling tests were carried out. Since the contribution of aluminum migration in TBCs damage evolution and failure was confirmed, the C-T-M life prediction at the micro level, TGO respiratory growth process at the meso level and the C-T-M damage at the macro level have been developed and modeled. Multiscale modeling of C-T-M damage and clarification of EB-PVD TBCs (electron beam physical vapor deposition thermal barrier coatings) failure criterion provides an effective and feasible way to systematically analyze the essential mechanism of TBCs failure and quantitatively evaluate its service performance.

热障涂层 (TBC) 在以化学-热-机械 (CTM) 失效机制和多尺度失效模式为特征的高温条件下使用。在目前的工作中，进行了等温、循环热和机械诱导剥落试验。由于铝迁移在 TBCs 损伤演变和失效中的贡献得到证实，微观水平的 CTM 寿命预测、中观水平的 TGO 呼吸生长过程和宏观水平的 CTM 损伤已经被开发和建模。CTM 损伤的多尺度建模和 EB-PVD TBC（电子束物理气相沉积热障涂层）失效准则的澄清为系统分析 TBC 失效的基本机制和定量评估其使用性能提供了有效可行的方法。