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- W4200003958 endingPage "127999" @default.
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- W4200003958 abstract "Mo, as a typical refractory element in Ni-base superalloys, will diffuse outward to the protective coating on the alloy surface during high-temperature oxidation, which will do harm to mechanical properties of the alloy and oxidation resistance of the coating. In this paper, (γ’ + β) two-phase Ni-34Al-0.3Dy coatings with or without Pt were prepared on a single crystal superalloy with high Mo content by electron beam physical vapor deposition (EB-PVD) and Pt electroplating. The short-term oxidation behavior of the coatings was investigated at 1100 °C aiming to explore the role of Dy and Pt on the harmful effect of Mo diffusion and its oxides. The results show that for Pt-free coating, Mo had already diffused to the coating surface after only 1 h. The pre-existing Dy2O3 would react with MoO3 to form Dy2MoO6 thus suppressed the volatilization of MoO3 at the early stage of oxidation. However, as the oxidation proceeded, Dy2MoO6 would decompose due to its poor thermal stability. While for Pt-doped coating, no Mo-rich oxides were detected throughout the entire oxidation process due to the suppression of outward Mo diffusion by the Pt layer at coating/substrate interface. The possible mechanisms were discussed in detail." @default.
- W4200003958 created "2021-12-31" @default.
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- W4200003958 date "2022-01-01" @default.
- W4200003958 modified "2023-10-15" @default.
- W4200003958 title "The interaction between Dy, Pt and Mo during the short-time oxidation of (γ’ + β) two-phase Ni Al coating on single crystal superalloy with high Mo content" @default.
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- W4200003958 doi "https://doi.org/10.1016/j.surfcoat.2021.127999" @default.
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