Impermeable thin AI2O3 overlay for TBC protection from sulfate and vanadate attack in gas turbines

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{alpha} - Al{sub 2}O{sub 3} overlay has been deposited on the YSZ surface by the composite-sol-gel route (CSG). Hot corrosion tests were carried out on the TBCs with and without Al{sub 2}O{sub 3} coating in molten salt mixtures (Na{sub 2}SO{sub 4} + 5%V{sub 2}O{sub 5}). The results showed that besides a thin and dense alumina overlay with the thickness of about 100-500 nm formed on the YSZ surface, the microcracks and porous near the surface in YSZ was also occupied by alumina because of penetration of the low viscosity precursor.

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Mao, Scott X. April 30, 2005.

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{alpha} - Al{sub 2}O{sub 3} overlay has been deposited on the YSZ surface by the composite-sol-gel route (CSG). Hot corrosion tests were carried out on the TBCs with and without Al{sub 2}O{sub 3} coating in molten salt mixtures (Na{sub 2}SO{sub 4} + 5%V{sub 2}O{sub 5}). The results showed that besides a thin and dense alumina overlay with the thickness of about 100-500 nm formed on the YSZ surface, the microcracks and porous near the surface in YSZ was also occupied by alumina because of penetration of the low viscosity precursor.

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  • Report No.: none
  • Grant Number: FC26-01NT41189
  • DOI: 10.2172/850476 | External Link
  • Office of Scientific & Technical Information Report Number: 850476
  • Archival Resource Key: ark:/67531/metadc785457

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  • April 30, 2005

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

Description Last Updated

  • Jan. 8, 2018, 5:26 p.m.

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Mao, Scott X. Impermeable thin AI2O3 overlay for TBC protection from sulfate and vanadate attack in gas turbines, report, April 30, 2005; Pittsburgh, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc785457/: accessed August 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.