Gadolinium zirconate (GZ) is a promising candidate for next-generation thermal barrier coating (TBC) materials. Its corrosion resistance against calcium-magnesium-alumino-silicate (CMAS) needs to be further increased for enhancing its in-service life. As the Gd element plays an important role in the CMAS resistance, three GZ coatings (GZ-0.75, GZ-1.0, and GZ-1.2) with different Gd/Zr atomic ratios are designed and deposited by laser enhanced chemical vapor deposition (LCVD) in this work. It is found that the generated Gd-apatite in GZ-1.2 would block micro-cracks inside the column structure and the inter-columnar gap more efficiently. Thus, the CMAS penetration rate (5.2 μm/h) of GZ-1.2 decreases over 27% comparing with GZ-1.0 and GZ-0.75, which is even lower than the Gd₂Zr₂O₇ coatings fabricated by electron-beam physical vapor depositions (EB-PVDs). This work provides a feasible way to adjust the coating’s corrosion resistance and may guide the development of future coating for long in-service life.

锆酸（GZ）是下一代热障涂层（TBC）材料的有希望的候选者。需要进一步提高其对钙镁铝硅酸盐（CMAS）的耐腐蚀性，以延长其使用寿命。由于Gd元素在CMAS抗性中起着重要作用，因此设计了三种Gd / Zr原子比不同的GZ涂层（GZ-0.75，GZ-1.0和GZ-1.2），并通过激光增强化学气相沉积（LCVD）进行沉积在这项工作中。结果发现，在GZ-1.2中生成的Gd-磷灰石会更有效地阻止柱状结构内部的微裂纹和柱间间隙。因此，与GZ-1.0和GZ-0.75相比，GZ-1.2的CMAS渗透率（5.2μm/ h）降低了27％以上，甚至低于Gd ₂ Zr ₂ O通过电子束物理气相沉积（EB-PVD）制造的_7种涂层。这项工作为调整涂层的耐蚀性提供了一种可行的方法，并且可以为今后使用寿命长的涂层的开发提供指导。