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首页> 外文期刊>Ochrona Przed Korozja >Top-surface characterization of La2Zr2O7+8YSZ thermal barrier coatings under condition of hot corrosion in liquid Na2SO4+V2O5 deposits
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Top-surface characterization of La2Zr2O7+8YSZ thermal barrier coatings under condition of hot corrosion in liquid Na2SO4+V2O5 deposits

机译:Top-surface characterization of La2Zr2O7+8YSZ thermal barrier coatings under condition of hot corrosion in liquid Na2SO4+V2O5 deposits

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摘要

Characterization of double ceramic layered thermal barrier coating (DCL TBC) top-surface of La2Zr2O7/8YSZ type under condition of hot corrosion in liquid deposits of sodium sulphate and vanadium oxides was described in this article. The base system used in investigations was deposited by atmospheric plasma spraying (APS) form feedstock powders of La2Zr2O7 and 8YSZ type on coupons from AMS 5599 Ni-based super-alloys with NiCrAlY bond-coat. The hot corrosion test was performed at temperature 920°C in two different variants of environment: 95 wt % Na2SO4 -wt 5% V2O5 and 50 wt % Na2SO4 - 50 wt% V2O5. The time of exposure in low-vanadia environment was 57 hours and 4 hours in high-vanadia deposits. The range of investigations included characterization of top-surface of TBC system after test end with special attention to characterization of corrosion products determined by X-Ray diffraction method (XRD), as well as the characterization of chemical constituent of generated products by SEM/EDS analysis.

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