High temperature behavior of diffusion aluminide coating on alloy 600 superalloy

Microstructure and hot corrosion behavior of hot dip siliconized coating on Ni-base superalloy IN738LC

“…It should be noted that, more intensive damage is created by hot corrosion than thermal oxidation, owing to the presence of molten corrosive salts. In addition, the intensity of corrosion damage in the grain boundaries is higher [37].…”

“…It is obvious that the A60 sample surface is corroded and the (production was a little destructed), whereas by increasing the corrosion time, the diffusion of the corrosive elements and corrosion diffusion depth increase. This could be attributed to vertical diffusion of aggressive species into the interface [37].…”

Interdiffusion and oxidation behaviour of Pt/Ru modified Ni–30Al–0.3Dy coating on Ni3Al-based superalloy

“…Rare earth (RE) modified NiAl is regarded as a promising intermetallic material for the protective coatings owing to its excellent performance on decreasing oxide scale growth rate and improving scale adhesion [1][2][3]. However, severe NiAl/superalloy interdiffusion limits the practical application of the coatings when they are subjected to a turbine inlet temperature (TIT) above 1100°C [4,5]. When serving in such an environment, the interdiffusion caused by the high Al content in NiAl coatings facilitates the formation of the diffusional influence zone (including the interdiffusion zone (IDZ) and the secondary reaction zone (SRZ)) and the precipitation of needle-like TCP phases, which results in a noticeable degradation of the mechanical properties (e.g.…”