Abstract
A Pt modified aluminide coating is prepared on the nickel-based alloy DZ125 containing Hf. After adding Pt, the continuous distribution of HfO2 could be observed at the oxide-scale/coating interface. Continuous HfO2 at the oxide-scale/coating interface could reduce the growth rate of the oxide scale. The local undulation of the oxide scale is enhanced due to the formation of continuous HfO2. Compared with the existence of crack in the oxide scale for the Pt free aluminide coating, compact alumina scale is formed on the surface of the Pt-doped aluminide coating, indicating the enhanced adhesion of the Pt modified aluminide coating.
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