Study of CMAS infiltration and evaporation behaviour under water vapour/sulphur oxide conditions in EB-PVD 7YSZ

نویسندگان

چکیده

The infiltration behaviour of CaO-MgO-Al2O3-SiO2 (CMAS) in Electron Beam Physical Vapour Deposited (EB-PVD) 7 wt% yttria stabilised zirconia (7YSZ) under controlled atmospheres (dry, wet and sulphurizing) was studied detail. microstructure the CMAS-infiltrated 7YSZ CMAS residue on top were analysed to interpret corrosion mechanisms. One major goals investigate stability CaSO4 into columns. At testing temperature 1250 °C, only SO2 atmosphere within TBC coating CaSO4-containing CMAS. Hydroxylation elements found conditions, which changed local composition behaviour. These chemistry changes have provoked acidity directly affected their aggressivity viscosity. Thermodynamic equilibrium predictions volatility components anhydrite various used understand experimental findings underlying

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ژورنال

عنوان ژورنال: Corrosion Science

سال: 2022

ISSN: ['1879-0496', '0010-938X']

DOI: https://doi.org/10.1016/j.corsci.2022.110123