Comparison of Hot Corrosion Resistance of YSZ and CYSZ Thermal Barrier Coatings in Presence of Sulfate-Vanadate Molten Salts

Abstract:

In this study, NiCoCrAlY bond coat and two types of top coat including yttria stabilized zirconia (YSZ) and ceria and yttria stabilized zirconia (CYSZ) were deposited on IN 738LC by air plasma spraying (APS). Hot corrosion behavior of samples in 1000 °C was study using 55wt.%V2O5-45wt.%Na2SO4 corrosive salt. Characterization and analysis of results was done by employing field emission scanning electron microscope (FESEM) and x-ray diffractometry (XRD). Results ravealed that plasma sprayed CYSZ TBCs exhibited excellent hot corrosion resistance which was superior to that of YSZ TBCs due to strong acidity and high contents of stabilizer.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 141-144
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.141
• Online since: February 2012
• Authors: Raheleh Ahmadi Pidani, Reza Shoja Razavi, Reza Mozafarinia, Hossein Jamali
• Keywords: Air Plasma Spray, CYSZ, Hot Corrosion, Thermal Barrier Coating (TBC), YSZ

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