(北京化工大学 材料科学与工程学院， 北京 100029)
摘 要: 结合固体与分子经验电子理论(EET)和改进的TFD理论， 计算了在不同粘结层Cr含量下热障涂层的陶瓷层/粘结层界面的界面结合因子， 以预测Cr对该界面结合的影响。 结果表明， 当粘结层的取向为(111)和(100)时， 加Cr可以改善该界面的界面结合。 当粘结层取向为(110)、 Cr含量低于10%（质量分数）时， Cr可以改善该界面的结合； Cr含量高于10%（质量分数）时， Cr将破坏该界面的结合。 因此在目前工艺条件控制织构比较困难的情况下，从界面结合考虑， Ni基粘结层含Cr量应尽量降低。 该结果可作为粘结层成分设计的依据。
关键字: 热障涂层; Cr; 粘结层; 界面结合因子
（ College of Materials Science and Engineering,
Beijing University of Chemical Technology,
Beijing 100029, China）
Abstract: Interface conjunction factors of the ceramic layer/binding layer interface of thermal barrier coatings were calculated on various bonding layer Cr contents with the combination of the empirical electron theory of solid and molecule (EET) and improved Thomas-Ferim-Dirac theory. The influence of Cr on the conjunction state of the interface can be predicted with the factors. The results show: When the orientation of the surface of the binding layer is (111) or (100), Cr will improve the interface conjunction; If the orientation is (110), Cr will improve the interface conjunction only when the Cr content is less than 10%; and Cr will decrease the interface conjunction when the Cr content is greater than 10%. Therefore, in the case that the orientation of the surface is difficult to be controlled technologically nowadays, the Cr content of Ni based binding layers should be as low as possible. Those results can be a foundation of the composition design of the binding layer.
Key words: thermal barrier coatings; Cr; binding layer; interface conjunction factors
