热障涂层的制备及其失效的研究现状

Research Status in Fabrication and Failure of Thermal Barrier Coatings

热障涂层作为航空发动机和燃气轮机高温部件的保护涂层,其抗高温失效能力直接决定了部件的工作效率和寿命。回顾热障涂层的发展历史及研究现状,着重介绍了热障涂层的主要制备方法及其相应涂层的结构特征,综述了各类热障涂层失效的影响因素和失效机理。

Thermal barrier coatings are widely used to protect the components in aircraft and industrial gas-turbine engines against high temperature damage. The energy efficiency and lifetime of these components are mainly dominated by the failure resistance of thermal barrier coatings in the high temperature atmosphere. In this paper, the development and research status of thermal barrier coatings are reviewed. Especially, the main fabricating methods and the microstructure feature of the coatings, as well as the factors resulting in the failure of thermal barrier coatings and its failure mechanisms, are summarized in detail.