Plasma spray-physical vapor deposition (PS-PVD), called the third-generation method for thermal barrier coatings (TBCs) fabrication, has great potential for their using in gas-turbine engines. Compared to atmospheric plasma spray (APS), called the first-generation TBCs, and electron beam-PVD (EB-PVD), called the second generation, PS-PVD has many interesting features, including non-line sight deposition, high deposition rate, and microstructural flexibility, among others. Such advantages make them a promising approach to prepare thermal barrier coatings for advanced gas-turbine engines. Using PS-PVD, feather-like columnar TBCs with good strain tolerance and low thermal conductivity can be fabricated. However, prior to their application in gas-turbine engines, some disadvantages, such as CMAS (CaO–MgO–Al₂O₃–SiO₂, etc.) corrosion and oxidation resistance, need to be addressed. In this work, a method to develop Al₂O₃-modified PS-PVD 7YSZ TBCs was proposed. The experimental results demonstrate that the Al₂O₃-modification process is an effective approach to address the aforementioned weaknesses of traditional PS-PVD 7YSZ TBCs.

等离子喷涂物理气相沉积（PS-PVD）被称为第三代热障涂层（TBC）制造方法，具有将其用于燃气轮机发动机的巨大潜力。与称为第一代TBC的大气等离子体喷涂（APS）和称为第二代的电子束PVD（EB-PVD）相比，PS-PVD具有许多有趣的功能，包括非直线观察沉积，高沉积速率以及微观结构的灵活性等。这些优点使它们成为制备用于高级燃气轮机发动机的隔热涂层的有前途的方法。使用PS-PVD，可以制造出具有良好应变耐受性和低导热性的羽毛状圆柱状TBC。但是，在将其应用于燃气轮机之前，存在一些缺点，例如CMAS（CaO–MgO–Al ₂ O₃ –SiO ₂等）的耐腐蚀性和抗氧化性，需要解决。在这项工作中，提出了一种开发Al ₂ O ₃改性的PS-PVD 7YSZ TBC的方法。实验结果表明，Al ₂ O ₃改性工艺是解决传统PS-PVD 7YSZ TBC的上述缺点的有效方法。