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Hot corrosion of lanthanum zirconate and partially stabilized zirconia thermal barrier coatings

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Academic year: 2021

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Fig. 1 Overall appearance of the 8YSZ „ a–c … and La 2 Zr 2 O 7 „ d–f … TBCs at various stages: in the as-deposited state „ a … and „ d …, after a 3-h dwell at 1000° C „ b … and „ e …, and following a 3-h corrosion test at 1000° C in contact with V 2 O 5 „
Fig. 4 Photographs of the coated test specimens following 360 h of exposure to sulfur-containing salts at 900° C: „ a … ZrO 2 – 8 wt
Fig. 8 Appearance of the coatings following exposure to a combination of sulfur- and vanadium-containing compounds at 900° C: „ a … YSZ after 60 h and „ b … La 2 Zr 2 O 7 after 20 h.
Fig. 11 X-ray spectra for coatings in the as-sprayed state and following exposure to a combination of sulfur- and  vanadium-containing compounds at 900° C: „a… YSZ and „b… La 2 Zr 2 O 7

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