An Investigation on Hot Corrosion Resistance of Plasma Sprayed YSZ‐Ceria TBC in Na ₂ SO ₄ +V ₂ O ₅ at 1050°C

Hot corrosion and mechanical properties of nanostructured Al2O3/CSZ composite TBCs

“…It is seen that the crystals are composed of yttrium, vanadium, cerium and oxygen, with the EDS analysis confirming the composition to be YVO 4 and CeVO 4 . It seems that during hot corrosion, yttrium and cerium elements have been removed from YSZ and [22][23][24] In the present study, as the hot corrosion test time increased, both the free CeO 2 precipitates and CeO 2 stabilisers remaining in zirconia reacted with the NaVO 3 salts to form CeVO 4 . 25 The mechanism of the formation of CeVO 4 crystals in CSZ coatings can be explained as the following steps: (i) Formation of CeO 2 triggering the mineral conversion process in the coating, and (ii) Formation of CeVO 4 triggering the reaction with NaVO 3 .…”

Evolution of Hot Corrosion Behavior of YSZ‐Ta2O5 Composites with Different YSZ/Ta2O5 Ratios

“…at increased temperatures. [20][21][22][23][24][25][26][27][28] To enhance the stability of YSZ beyond 1200°C, many researchers have tried further doping of the YSZ system, for example, with bigger or smaller cations of rare earth elements. 29 A comparative analysis of various stabilizers including MgO, Y 2 O 3 , Sc 2 O 3 , In 2 O 3 , CeO 2 , SmO 2, and TiO 2 appeared in.…”

“…Scandia-and india-stabilized zirconia has proven more resistant than yttria-stabilized zirconias to corrosion by vanadia. [21][22][23]28,31,32 This behavior shows that an oxide whose cation is more acidic than yttrium, such as scandium and indium, would be thermodynamically less prone to react with acidic oxides. Thus, when stabilized with such oxides, the zirconia would be more resistant to hot corrosion by acidic oxides.…”

“…There are numerous earlier studies on the hot corrosion behavior of YSZ coatings against foremost corrosive materials such as vanadium pentoxide (V 2 O 5 ), sodium sulfate (Na 2 SO 4 ), etc. at increased temperatures …”

“…Such studies have shown that the YSZ is attacked by pure NaVO 3 , resulting in the removal of yttria as YVO 4 and the destabilization of the tetragonal to the monoclinic phase. Scandia‐ and india‐stabilized zirconia has proven more resistant than yttria‐stabilized zirconias to corrosion by vanadia . This behavior shows that an oxide whose cation is more acidic than yttrium, such as scandium and indium, would be thermodynamically less prone to react with acidic oxides.…”