(北京化工大學(xué) 材料科學(xué)與工程學(xué)院， 北京 100029)
摘 要: 結(jié)合固體與分子經(jīng)驗電子理論(EET)和改進(jìn)的TFD理論， 計算了在不同粘結(jié)層Cr含量下熱障涂層的陶瓷層/粘結(jié)層界面的界面結(jié)合因子， 以預(yù)測Cr對該界面結(jié)合的影響。 結(jié)果表明， 當(dāng)粘結(jié)層的取向為(111)和(100)時， 加Cr可以改善該界面的界面結(jié)合。 當(dāng)粘結(jié)層取向為(110)、 Cr含量低于10%（質(zhì)量分?jǐn)?shù)）時， Cr可以改善該界面的結(jié)合； Cr含量高于10%（質(zhì)量分?jǐn)?shù)）時， Cr將破壞該界面的結(jié)合。 因此在目前工藝條件控制織構(gòu)比較困難的情況下，從界面結(jié)合考慮， Ni基粘結(jié)層含Cr量應(yīng)盡量降低。 該結(jié)果可作為粘結(jié)層成分設(shè)計的依據(jù)。
關(guān)鍵字: 熱障涂層; Cr; 粘結(jié)層; 界面結(jié)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
