Study on the Influence Law of Ce on Microstructure and High-Temperature Oxidation Resistance of Ti-Al-Si Composite Coating

High-temperature titanium alloys are widely used in aerospace hot parts; however, the thermal barrier temperature of 600 °C limits its service temperature. In this paper, a two-step hot-dip plating method is proposed to prepare composite coating containing Ce on surface alloy, which can make oxidation resistance alloy reach 800 The microstructure, phase composition, and element distribution Ce-containing Ti-Al-Si coating, pre-oxidation high-temperature were studied. results showed that was mainly composed (Ti,Ce)(Al,Si)3 layer, Ti-Al binary system layer dense Al2O3 rich CeO2. distributed Ti3Al, TiAl, TiAl3 + Ti5Si3 mixed Al2O3. addition could improve uniformity prevent spread cracks, coating.