2O3涂層，通過XRD、SEM和EDS等分析方法對所制備涂層的相組成和顯微結(jié)構(gòu)進(jìn)行了表征。闡明了Al和Fe2O3在加熱和反應(yīng)等離子噴涂過程中的反應(yīng)機理。DTA分析結(jié)果表明，氬氣氛下長時間熱處理產(chǎn)物主要為Fe、Al2O3和FeAl相。然而，在等離子噴涂過程中，低氧分壓環(huán)境導(dǎo)致中間產(chǎn)物FeAl2O4鐵尖晶石相的生成，由于近常壓等離子噴涂過程的冷卻速度極快，該相可以保留在最終涂層結(jié)構(gòu)中。而低壓反應(yīng)等離子噴涂等離子體射流飛行距離長，還原性氣氛和較長的反應(yīng)時間將其進(jìn)一步還原為FeAl相。;Reactive plasma spray (RPS) technique is frequently used to prepare high-performance coating materials with different application requirements. Based on the classical thermite reaction, the Al-Fe2O3 coatings were fabricated by RPS under atmosphere and low-pressure ambient. The phase compositions and microstructures of the obtained coatings were characterized by XRD, SEM and EDS. Moreover, the reaction mechanisms of thermite reaction of Al and Fe2O3 in sintering and RPS process were elucidated. The DTA analysis results indicate that the main sintering products are Fe, Al2O3 and FeAl phases under prolongated reaction condition with Ar gas protetion. However, low oxygen partial pressure leads to the formation of FeAl2O4 hercynite phase as an intermediate product during spraying. In atmosphere-reactive plasma spraying (A-RPS), such phase can be retained in the final coating under extremely fast cooling rate. Furthermore, it can also be continuously reduced to FeAl phase in the low pressure Ar-H2 ambience due to the deoxidation effect and long in-flight distance of plasma jet."/>