Evolution of hot corrosion behavior of YSZ-Ta2O5 composites with different YSZ/Ta2O5 ratios

Document Type

Article

Publication Date

5-1-2015

Abstract

This study compares the hot corrosion performance of yttria-stabilized zirconia (YSZ)-Ta2O5 composite mixtures (TaYSZ) in the presence of molten mixture of Na2SO4 + V2O5 at 1100°C. The tested compositions vary from pure YSZ (0TaYSZ) to a Ta2O5-dominating (70 wt% Ta2O5+ balance YSZ, 70TaYSZ) composite mixture with a gradual increase of Ta2O5. 50TaYSZ (50 wt% Ta2O5 + balance YSZ) sample forms a highly stable zirconium tantalum oxide. 50TaYSZ is more stable, both thermally and chemically in Na2SO4+V2O5 media at 1100°C, than other tested YSZ-Ta2O5 (TaYSZ) composites, and shows a good hot corrosion resistance.

Publication Source (Journal or Book title)

International Journal of Applied Ceramic Technology

First Page

542

Last Page

550

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