Herein, we propose a new multidisciplinary approach for investigating the corrosion behavior of thermal barrier coatings, combining the thermal-gradient mechanical fatigue method with hot corrosion tests. Corrosive salts (Na₂SO₄; V₂O₅) of varying concentrations (10−20 mg/cm²) were deposited on the surface of yttria-stabilized zirconia (YSZ) coatings to evaluate the microstructural changes occurring during the reaction, via thermal graded mechanical fatigue tests. The tests were conducted at a surface temperature of 1150 °C in 10 min cycles and underwent applied uniaxial tensile loads. The corrosion tests show that the ZrV₂O₇ plays an important role as an intermediate in the collapse of the lamellar structures during the reaction, which results from the repetitive precipitation of V₂O₅ and m-ZrO₂ from the ZrV₂O₇. The microstructure of corroded YSZ coatings exhibited a different degradation mechanism under a thermomechanical environment, compared with the testing under isothermal atmospheric conditions.

在此，我们提出了一种新的多学科方法来研究热障涂层的腐蚀行为，将热梯度机械疲劳方法与热腐蚀试验相结合。将不同浓度 (10-20 mg/cm ² ) 的腐蚀性盐 (Na ₂ SO ₄ ; V ₂ O ₅ )沉积在氧化钇稳定的氧化锆 (YSZ) 涂层表面，以评估反应过程中发生的微观结构变化，通过热分级机械疲劳试验。测试在 1150 °C 的表面温度下进行 10 分钟循环，并承受施加的单轴拉伸载荷。腐蚀试验表明，ZrV ₂ O ₇在反应过程中，由于 V ₂ O ₅和m -ZrO ₂从 ZrV ₂ O ₇重复沉淀而导致的层状结构坍塌中作为中间体起着重要作用。与等温大气条件下的测试相比，被腐蚀的 YSZ 涂层的微观结构在热机械环境下表现出不同的降解机制。