THE INFLUENCE OF Mo DIFFUSION ON THE THERMAL BEHAVIOR OF TBCs ON Ni_3Al BASED ALLOY IC-6

作     者：D.B. Zhang S.K. Gong H.B. Xu Y.F. Han 

作者机构：Department of Materials Science and Engineering Beijing University of Aeronautics and AstronauticsBeijing 100083 China Cast Superalloy Laboratory Beijing Institute of Aeronautical Materials Beijing 100095 China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2002年第15卷第1期

页      面：45-48页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work is sponsored by the National Natural Science Foundation of China (NFSC) and Specialized Research Fund for the Doctoral Program of Higher Education of China (SRFDP) 

主　　题：EB-PVD thermal barrier coatings (TBCs) thermal cyclic diffusion 

摘      要：Conventional two-layered structure thermal barrier coatings (TBCs) were prepared onto γ -Ni3Al based alloy IC-6 by electron beam physical vapor deposition (EB-PVD). Isothermal oxidation and thermal cycling tests were carried out to investigate the effect of Mo content at the interface between bond coat and ceramic top coat caused by diffusion. It has been found that the alloy coated with TBCs presented the lowest oxidation weight gain value for the reason that the ceramic top coat in TBC system can effectively stop Mo oxides evaporating. The life time of TBCs has close relation with Mo content at the interface between the bond coat and top coat. Spaliation of ceramic top coat occurred during thermal cyclic testing when Mo atoms accumulated at the interface up to certain amount to decline the combination between the bond coat and top coat.