热障涂层结合强度及失效模式研究

The Bonding Strength and Failure Modes of Thermal Barrier Coatings

采用实验方法研究了热障涂层的结合强度,并探讨了温度、氧化时间、涂层厚度以及基体等因素对结合强度的影响。涂层采用了等离子和EB-PVD两种喷涂工艺,采用双向测试法,分析了粘结层氧化对涂层法向和切向结合强度的影响,研究结果表明同一种喷涂工艺方法,尽管涂层厚度不同,但其结合强度是非常接近的,为带涂层航空发动机部件的强度设计和分析以及涂层失效模型的建立提供的参考。

The bonding strength of the thermal barrier coating including ASP and EB-PVD is studied under different high temperature experiments.The effects of different temperatures,thicknesses of coating and substrate are analyzed.Using the two-direction testing,the normal and tangent bonding strengths under high temperature oxidation are investigated.Tests show that the bonding strength of the same TBCs with different thicknesses is very close.The experiments provided many data and reference for failure modelling and aero-engine parts designing with TBC.