Thermal barrier coatings are applied to the protection of metal components in aircraft thrusters, power generation and ship gas turbine engines, which can make the gas turbine run for a long time in a high-temperature environment. The fracture toughness of the coating characterizes the ability of the material to prevent crack propagation and is one of the most important factors to be taken into consideration to prolong the life of the thermal barrier coating. The current research is mainly through dispersion toughening, the phase transformation toughening, whisker toughening, ferroelastic toughening, and other methods to improve the fracture toughness of ceramic coatings. In this paper, the use of different toughening mechanisms and the addition of unique materials to improve the fracture toughness of thermal barrier coatings are introduced, and the future research direction is put forward.

隔热涂层用于保护飞机推进器，发电和船舶燃气轮机发动机中的金属部件，这可以使燃气轮机在高温环境下长时间运行。涂层的断裂韧性表征了材料防止裂纹扩展的能力，并且是延长隔热涂层寿命的最重要因素之一。目前的研究主要是通过分散增韧，相变增韧，晶须增韧，铁弹性增韧等方法来提高陶瓷涂层的断裂韧性。本文介绍了使用不同的增韧机制并添加独特的材料来提高隔热涂层的断裂韧性的方法，