Hot corrosion behavior of laser-glazed plasma-sprayed yttria-stabilized zirconia thermal barrier coatings in the presence of V2O5

Microstructural stability of zirconia–alumina composite coatings during hot corrosion test at 1050°C

“…2d) consists of some small crystals. XRD analysis from (1) is used to determine monoclinic phase volume fraction [10][11][12][13][14][15][16]:…”

Microstructure, mechanical properties, hot deformation and oxidation behavior of Ti–45Al–5.4V–3.6Nb–0.3Y alloy

“…Li [32] investigated the oxidation behavior of TiAl alloy with V additions, and found that the poor oxidation of TiAl alloy with V additions was mainly attributed to yielding of V 2 O 5 which is a volatile oxide. In Ti-45Al-5.4V-3.6Nb-0.3Y alloy, the stable oxide of YVO 4 , reacted by Y 2 O 3 and V 2 O 5 [33], occurs in the oxidation scale and it can reduce the amount of V 2 O 5 volatilizing and is beneficial for improving oxidation resistance of Ti-45Al-5.4V-3.6Nb-0.3Y.…”

Influence of laser‐glazing on hot corrosion resistance of yttria‐stabilized zirconia TBC in molten salt mixture of V2O5 and Na2SO4

“…These segmented cracks were caused by the shrinkage of the molten material and by the relief of thermal-induced residual stresses during cooling. The segmented cracks in the coating surface are characteristic features of laser-re-melted ceramic materials [14][15][16][17][18][19][20][25][26][27].…”

“…In previous studies, a variety of methods have been conducted to seal the top coat surface, including the liquid metal impregnation, hot isostatic pressing (HIP), laser-glazing, sol-gel process, and thin chemical vapor deposition (CVD) overcoatings, to prevent the penetration of molten salts into the porous YSZ coatings [12][13][14][15][16][17][18][19][20][21][22][23]. Laser-glazing has been proved to be a highly promising method to improve the coating quality of the plasma-sprayed coating by reducing the surface roughness (Ra), eliminating open pores within the surface and generating a controlled segmented crack network.…”

“…Laser-glazing has been proved to be a highly promising method to improve the coating quality of the plasma-sprayed coating by reducing the surface roughness (Ra), eliminating open pores within the surface and generating a controlled segmented crack network. Hot corrosion tests in the presence of V 2 O 5 indicated that the lifetimes of the plasmasprayed 6.1YSZ, 7.3YSZ, 12YSZ, and 19.5YSZ (numbers denote wt% of Y 2 O 3 ) coatings were largely increased after laser-glazing [16,17]. Petitbon and Boquet [21] reported that the plasma-sprayed ZrO 2 coating had exhibited a higher thermal shock resistance after laser-glazing in a simulated test using a diesel engine whose working temperature approached 900 8C.…”