The hot corrosion resistance of 8 wt.% yttria‐stabilized zirconia (8YSZ) powder, modified with CaO, MgO, Ta2O5, and TiO2 at concentrations of 5, 10, and 15 wt.%, was systematically investigated in a molten vanadium pentoxide (V2O5) environment at 900°C and 1100°C for 48 h. The modified 8YSZ samples, coated with V2O5, underwent thermal cycling totaling 12 cycles. Results revealed susceptibility to hot corrosion for all doped 8YSZ powders, attributed to tetragonal ZrO2 destabilization, forming monoclinic ZrO2. Remarkably, 8YSZ/CaO demonstrated exceptional resistance to hot corrosion when exposed to a temperature of 900°C. The corrosion product found in the 8YSZ/Ta2O5 material was determined to be tetragonal Zr0.66Y0.17Ta0.17O2. Although, 8YSZ/TiO2 undergoes deterioration at 900°C, it exhibits improved resistance at 1100°C, resulting in the formation of TiVO4.

中文翻译：

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氧化物掺杂氧化钇稳定氧化锆粉末在V2O5熔盐中的抗热腐蚀性能

CaO、MgO、Ta 改性的 8 wt.% 氧化钇稳定氧化锆 (8YSZ) 粉末的热腐蚀性能2氧5，和二氧化钛2在熔融五氧化二钒 (V2氧5）环境在 900°C 和 1100°C 下保持 48 小时。改进后的8YSZ样品，涂有V2氧5，经历了总共12个循环的热循环。结果表明，所有掺杂 8YSZ 粉末都对热腐蚀敏感，这归因于四方 ZrO2失稳，形成单斜晶系 ZrO2。值得注意的是，当暴露在 900°C 的温度下时，8YSZ/CaO 表现出优异的抗热腐蚀性能。 8YSZ/Ta 中发现的腐蚀产物2氧5材料被确定为四方Zr0.66Y0.17Ta0.17氧2。虽然，8YSZ/TiO2在 900°C 时发生劣化，在 1100°C 时表现出改善的电阻，导致形成 TiVO4.