Influence of Temperature on CaO-MgO-Al2O3-SiO2 (CMAS) Corrosion on Thermal Barrier Coatings

The working temperature in gas turbine engines could reach as high as 1200°C. Thus, a ceramic coating is applied to protect the blade from high temperature. Additionally, molten dust from the air could cause the degradation and make the coatings fail to work. Lanthanide zirconia material is a new promising materials in thermal barrier coatings due to its high phase stability and corrosion resistance from CMAS (CaO-MgO-Al₂O₃-SiO₂). This research would demonstrate the corrosion resistance is due to the dense reaction layer which can prevent further corrosion.