2O3復(fù)合涂層，研究了滲鋁層和氧化膜的微觀組織和相分布。結(jié)果表明，稀土改性滲鋁層可分為3層：外層滲鋁層、過渡層和內(nèi)擴散層。滲鋁層主要由FeAl相和Fe3Al相組成。FeAl相主要集中在滲鋁層的外層，為Al2O3氧化膜的選擇性氧化提供了有利條件。氧化膜表面呈α-Al2O3脊?fàn)罱Y(jié)構(gòu)。此外，表面氧化鈰的存在是由于氧化初期Ce向外擴散且與O2的優(yōu)先反應(yīng)。氧化膜可分為2層，即純α-Al2O3層和主要由α-Fe(Al)和Al、Fe、Ce的混合氧化物組成的過渡層。;Fe-Al/Al2O3 composite coating was prepared through rare earth-modified aluminizing and in-situ oxidation at 760 °C. The microstructure and phase distribution of the aluminizing layer and oxide film were investigated. Results show that the rare earth-modified aluminizing layer can be divided into three layers: an outer aluminizing layer, a transition layer, and an inner diffusion layer. The aluminizing layer is predominantly composed of FeAl phase and Fe3Al phase. Notably, the FeAl phase is primarily concentrated in the outer layer of aluminizing layer, providing favorable conditions for selective oxidation of the Al2O3 oxide film. The surface of oxide film exhibits the α-Al2O3 ridge structure. Additionally, the presence of Ce oxide on the surface is attributed to the outward diffusion of Ce and its preferential reaction with O2 during the initial oxidation stage. The oxide film can be divided into two layers, namely a pure α-Al2O3 layer and a transition layer which is mainly composed of α-Fe(Al) and mixed oxides of Al, Fe, and Ce."/>