| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1470690 | Corrosion Science | 2011 | 10 Pages |
Cr/Dy doped β-NiAl coatings were produced by electron beam physical vapour deposition (EB-PVD). Cyclic oxidation and hot-corrosion behaviour of the coatings was investigated. The addition of 0.1 at.% Dy to the β-NiAl coating significantly improved the cyclic oxidation resistance, while the addition of 1.3 at.% Cr to the NiAlDy accelerated the scale spallation. Spinels containing Mg, Na and Ca and pitting resulting from spallation of the spinels were observed on the NiAlDy coating after 200 h hot-corrosion at 950 °C. The NiAlDyCr coating effectively suppressed the formation of pitting and spinels.
Research highlights► Cr/Dy doped β-NiAl coatings were produced by electron beam physical vapor deposition. ► The microstructures of the Cr/Dy doped β-NiAl coatings were characterized. ► The effect mechanisms of Dy and Cr on the cyclic oxidation of the NiAl coatings were investigated. ► Hot-corrosion behavior and associated failure mechanism of the NiAl coatings were investigated.
