Effect of bond coat surface roughness on the thermal cyclic behavior of thermal barrier coatings

Effect of shot peening on the oxidation behavior of thermal barrier coatings

“…A certain level of surface roughness is desired in the production of coating. A number of studies are available in the literature regarding the effect of surface roughness on TBC formation [10,[28][29][30][31][32][33][34]. According to literature, surface treatments like shot peening, grit blasting and polishing are used to decrease surface roughness for TBC systems.…”

Cyclic oxidation and diffusion barrier behaviors of oxides dispersed NiCoCrAlY coatings

“…On the other hand, the presence of W, Ti and Ta in the coatings could be harmful to the oxidation resistance of the coatings. It has been shown that voids formed beneath the TGO layer due to volatilization of WO 3 at high temperatures could weaken the oxide scale adherence [35,36]. About 6 and 4 wt.% Hf were detected in the TGO layers of coatings A and B, respectively, as a result of outward diffusion.…”

Study of oxidation behavior of nanostructured NiCrAlY bond coatings deposited by cold spraying

“…Therefore, the oxidation behavior of the nanostructured coatings was examined through isothermal oxidation tests. A recent study clearly showed that the surface geometry of the bond coat significantly influences the uniformity of thermally grown oxide [14][15][16] and consequently, the service life time of TBCs [17][18][19][20].…”