Calcium-magnesium-alumina-silicate (CMAS) corrosion is a great challenge for the long lifetime of thermal barrier coatings (TBCs). In this study, the surface microstructure of TBCs is tailored by laser glazing to improve the CMAS resistance, and the modified coatings are designed to have single and double laser-glazed layers. In the double laser-glazed coating, the vertical cracks in the glazed layer which penetrate directly for the case of the single laser-glazed coating become bifurcated and staggered. Under molten CMAS conditions, the coating with double laser-glazed layers highly resists to melt penetration, and the glazed layer exhibits excellent phase stability and structural integrity.

钙镁铝硅酸盐 (CMAS) 腐蚀对于热障涂层 (TBC) 的长寿命来说是一个巨大的挑战。在这项研究中，TBCs 的表面微观结构通过激光上釉来调整以提高 CMAS 抗性，并且改性涂层被设计为具有单层和双层激光上釉层。在双层激光上釉涂层中，直接穿透单层激光上釉涂层的釉层中的垂直裂缝变得分叉和交错。在熔融 CMAS 条件下，具有双激光釉层的涂层具有很强的抗熔体渗透性，并且釉层表现出优异的相稳定性和结构完整性。