Deposition of ceramic thermal barrier coatings by gas flow sputtering

“气流溅射沉积陶瓷热障涂层”项目旨在研究气流溅射在燃气轮机上应用的适用性。虽然气流溅射技术的沉积速率相对较低，但它比EB-PVD方法的成本效益要高得多。气流溅射生产的涂层具有与eb - pvd涂层相似的微观结构，因此在使用寿命方面应该优于APS涂层。此外，微观结构可以在很宽的范围内控制。到目前为止，还没有系统地研究微观结构对工艺参数的依赖关系。在项目的第一个阶段，使用简化的模型系统确定了参数对过程的影响。确定了有前途的微观结构。此外，获得了热循环过程中损伤和失效的初步结果，表明损伤是由TGO的微观结构和热障涂层的刚度和烧结决定的。在新提出的项目阶段，将详细研究这些参数的相互作用及其对涂层寿命的影响。

The project "deposition of ceramic thermal barrier coatings by gas flow sputtering" is intended to study the suitability of gas flow sputtering for applications in gas turbines. Although the gas flow sputtering technique has a comparably low deposition rate, it is considerably more cost-efficient than the EB-PVD method. Coatings produced by gas flow sputtering have a microstructure similar to that of EB-PVD-coatings and should thus be superior to APS coatings with respect to their life time. Furthermore, the microstructure can be controlled within a wide range. So far, no systematic investigations of the dependence of the microstructure on the process parameters have been published. In the first project phase, the parameter influence on the process has been determined using a simplified model system. Promising microstructures were identified. Furthermore, first results on damage and failure during thermal cycling were obtained, showing that damage is determined by the microstructure of the TGO and by the stiffness and sintering of the thermal barrier coating. In the newly proposed project phase, the interplay of these parameters and their influence on the coating life time will be investigated in detail.