An investigation on hot corrosion behavior of YSZ-Ta2O5 in Na2SO4+V2O5 salt at 1100°C

Hot corrosion behavior of solution precursor and atmospheric plasma sprayed thermal barrier coatings

“…This leaching out of yttria destabilizes YSZ and accentuates failure of TBCs. Molten salts (especially chlorides) lead to the formation of voluminous non-protective oxides on the bond coat surface resulting in failure of TBCs by delamination at the bond coat/top coat interface [4,5,[16][17][18][19][20][26][27].…”

“…Thermal barrier coatings (TBCs) are widely used to provide thermal insulation for components of hot sections of gas turbines in order to prolong their operating life and/or to increase allowable operating temperatures [1][2][3][4]. Typically, TBCs are double layered coatings comprising a metallic bond coat and a ceramic top coat.…”

Corrosion of lanthanum magnesium hexaaluminate as plasma-sprayed coating and as bulk material when exposed to molten V2O5-containing salt

“…In order to develop a ceramic material with improved phase stability and corrosion resistance for TBC applications, on one hand, lots of new derived compounds of YSZ have been widely investigated by introducing metal oxides such as CeO 2 , Sc 2 O 3 , In 2 O 3 , Ta 2 O 5 and Re 2 O 3 (Re = La, Nd, Sm, Gd, Dy and Yb) as the new dopant or co-dopants. [11][12][13][14][15][16][17] On the other hand, much effort has been devoted into developing new TBC candidate materials such as rare earth zirconates (Ln 2 Zr 2 O 7 , Ln = La to Gd) with the pyrochlore-type structure [18,19], perovskite-type SrZrO 3 [20], fluorite-type La 2 Ce 2 O 7 [21] for higher temperature applications.…”

Hot Corrosion Behavior of BaLa2Ti3O10 Thermal Barrier Ceramics in V2O5 and Na2SO4 + V2O5 Molten Salts

“…In a marine environment or engines use low-quality fuel, molten salts have severe damage to YSZ TBCs, especially at a temperature range of 600-1000 • C [14][15][16][17][18]. Molten salts infiltrate into the TBCs, and react with YSZ grains to form YVO 4 , leading to the depletion of yttria stabilizer in the TBC.…”