陶瓷热障涂层制备技术及发展趋势

Recent Development in Preparation Techniques of Thermal Barrier Coatings

陶瓷热障涂层用于燃气轮机的热端部件可显著提高其使用温度,延长部件的使用寿命,并增加发动机的效率。介绍了制备陶瓷热障涂层的两种主要方法:等离子喷涂和电子束物理气相沉积技术。分析了热障涂层的剥落失效机理,并对热障涂层的隔热效果的研究进行了介绍。

Ceramic thermal barrier coatings(TBCs)have been increasingly used to improve the durability of aircraft gas turbine engine. This not only increases component lifetime, but also allows higher engine temperatures and therefore better efficiency. Comparing with the plasma spray technique and the electron beam physical vapor deposition has led to the incorporation of very durable coatings into the most demanding rotating turbine components. The failure mechanism and the effectiveness of TBCs in thermal insulation are also discussed.