-2，F(xiàn)e25Cr5Al-RE合金增重分別為0.03、0.35和0.92 mg·cm-2。氧化后所有合金的氧化膜成分均為α-Al2O3。La、Ce能夠促進合金形成致密、連續(xù)的氧化膜，顯著提高了Fe25Cr5Al合金的抗高溫氧化性能。此外，F(xiàn)e25Cr5Al-RE合金氧化膜/基體界面存在稀土氧化物釘，使得氧化膜與基體的結合更加緊密，增強了氧化膜/基體粘附性。Fe25Cr5Al-RE合金氧化后，氧化膜內存在稀土氧化物，有效地防止了合金發(fā)生進一步氧化。;Fe25Cr5Al alloys with and without rare earth (RE) elements La and Ce, namely Fe25Cr5Al-RE and Fe25Cr5Al alloys, were prepared and isothermal oxidation tests were conducted at 1100 °C. The morphology of oxide scale was observed by scanning electron microscope (SEM), and the oxidation product was identified by energy disperse spectroscopy (EDS) coupled with X-ray diffraction (XRD). Results show that after oxidation for 1, 20, and 300 h, the mass gain of Fe25Cr5Al alloys is 0.08, 0.84, and 4.41 mg·cm-2, but that of Fe25Cr5Al-RE alloys is 0.03, 0.35, and 0.92 mg·cm-2, respectively. The oxide scale of the two alloys consists of α-Al2O3. La and Ce promote the formation of compact and continuous oxide scale, which significantly improves the high temperature oxidation resistance of Fe25Cr5Al alloys. Moreover, RE oxide pegs can be observed at substrate/scale interface of Fe25Cr5Al-RE alloys, which makes the bond between substrate and scale tighter, thus enhancing the adhesion of the interface. There are RE oxides in oxide scale of Fe25Cr5Al-RE alloys, which effectively inhibits further oxidation of the alloys."/>