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- W4294647029 abstract "Abstract Hot corrosion behavior of Thermal Barrier Coatings (TBCs) has been studied by comparison between double layer coatings and graded coatings. Two types of oxide ceramics, 8 mass % Y2O3-ZrO2(8YZ) and 2CaOSiO2-15mass% CaOZrO2 (C2S-15 CZ), with a bond coating of NiCrAlY were applied to metallic substrates in this study. After a hot corrosion test by V2O5-Na2SO4 corrosive ashes, hot corrosion behavior of TBC has been investigated by visual inspection, metallography, X-ray diffraction and EPMA. The C2S-15%CZ coating reacted with V2O5 only where it was in direct contact with the material. The affected area from the reaction was limited to the coating surface where V2O5 existed. The coating showed adequate hot corrosion-resistance. It was found on the 8YZ coating that Y2O3, the stabilizing component, particularly reacts with V2O5 and loses its function; this led to partial spalling of the coating. It was observed that the durability of the double layer TBC was largely influenced by the performance of a corrosion resistant NiCrAlY undercoat which provided protection against corrosive components penetrating through the ceramic topcoat. It was observed that the graded coating degraded due to oxidation of NiCrAlY particles which independently existed near the coating surface and affected the durability of TBC." @default.
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- W4294647029 date "2003-05-05" @default.
- W4294647029 modified "2023-09-25" @default.
- W4294647029 title "Hot Corrosion Behavior of Graded Thermal Barrier Coatings Formed by Plasma Spraying Process" @default.
- W4294647029 doi "https://doi.org/10.31399/asm.cp.itsc2003p1525" @default.
- W4294647029 hasPublicationYear "2003" @default.
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