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首页> 外文期刊>Coatings >Hot Corrosion Behavior of BaLa2Ti3O10 Thermal Barrier Ceramics in V2O5 and Na2SO4 + V2O5 Molten Salts
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Hot Corrosion Behavior of BaLa2Ti3O10 Thermal Barrier Ceramics in V2O5 and Na2SO4 + V2O5 Molten Salts

机译：BaLa2Ti3O10热障陶瓷在V2O5和Na2SO4 + V2O5熔盐中的热腐蚀行为

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摘要

BaLa2Ti3O10 ceramics for thermal barrier coating (TBC) applications were fabricated, and exposed to V2O5 and Na2SO4 + V2O5 molten salts at 900 °C to investigate the hot corrosion behavior. After 4 h corrosion tests, the main reaction products resulting from V2O5 salt corrosion were LaVO4, TiO2, and Ba3V4O13, whereas those due to Na2SO4 + V2O5 corrosion consisted of LaVO4, TiO2, BaSO4 and some Ba3V4O13. The structures of reaction layers on the surfaces depended on the corrosion medium. In V2O5 salt, the layer was dense and had a thickness of 8–10 μm. While in Na2SO4 + V2O5 salt, it had a ~15 μm porous structure and a dense, thin band at the bottom. Beneath the dense layer or the band, no obvious molten salt was found. The mechanisms by which the reaction layer forms were discussed.
机译：制备了用于热障涂层（TBC）的BaLa2Ti3O10陶瓷，并将其在900°C下暴露于V2O5和Na2SO4 + V2O5熔融盐中，以研究热腐蚀行为。经过4小时的腐蚀试验，由V2O5盐腐蚀引起的主要反应产物为LaVO4，TiO2和Ba3V4O13，而由Na2SO4 + V2O5腐蚀引起的反应产物由LaVO4，TiO2，BaSO4和一些Ba3V4O13组成。表面上反应层的结构取决于腐蚀介质。在V2O5盐中，该层致密且厚度为8-10μm。在Na2SO4 + V2O5盐中，它具有〜15μm的多孔结构，底部有致密的细带。在致密层或条带下，未发现明显的熔融盐。讨论了反应层形成的机理。

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