摘要
The high-temperature oxidation-resistant MoSi2 coating on the Nb substrate was prepared by slurry firing. The structure, compositions and phase distribution of the coating and the relationship between these features and the oxidation resistance of the coating were investigated by SEM, EDS and XRD. The results indicate that the interface between the coating and the substrate has metallurgic combination, and a transitional layer is formed by diffusion. The multi-layer structure improves the oxidation resistance of the coating. The method of slurry firing to prepare the high-temperature MoSi2 coating on Nb is feasible. The SiO2 scale, which is formed on the surface of the coating by the self-oxidation of MoSi2, prevents the further diffusion of oxygen.
The high-temperature oxidation-resistant MoSi_2 coating on the Nb substrate was prepared by slurry firing. The structure, compositions and phase distribution of the coating and the relationship between these features and the oxidation resistance of the coating were investigated by SEM, EDS and XRD. The results indicate that the interface between the coating and the substrate has metallurgic combination, and a transitional layer is formed by diffusion. The multi-layer structure improves the oxidation resistance of the coating. The method of slurry firing to prepare the high-temperature MoSi_2 coating on Nb is feasible. The SiO_2 scale, which is formed on the surface of the coating by the self-oxidation of MoSi_2, prevents the further diffusion of oxygen.
出处
《中国有色金属学会会刊：英文版》
CSCD
2005年第1期18-22,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(20010533003) supported by the Special Research Foundation of PhD Study
