热障涂层简介及制备方法综述

urbine blade material is the key technology of aero-gas turbine engine. Since the concept of superalloy was first put forward in the late 1930s, its performance has been greatly improved. The development of superalloy materials has also gone through two stages: directional crystallization and single crystal casting, which continuously improves the limit temperature of its use. Turbine blades rotate in high temperature working gas, which requires alloy materials with high fatigue strength and mechanical properties. However, this harsh environment far exceeds the limit service temperature of superalloy materials (< 1423K), so advanced blade structure design and high temperature protective coating technology must be adopted. This paper focuses on the development process and main preparation methods of thermal barrier coatings, and puts forward the prospect on this basis.