Phase stability and hot corrosion behavior of ZrO2-Ta 2O5 compound in Na2SO4-V 2O5 mixtures at elevated temperatures

Document Type

Article

Publication Date

4-1-2014

Abstract

For thermal barrier coating (TBC) applications, yttria stabilized zirconia (YSZ) is susceptible to hot corrosion. This paper examines the hot corrosion performance of ZrO2/Ta2O5 compounds. Different compositions of ZrO2-Ta2O5 samples in the presence of molten mixture of Na2SO4+V2O 5 at 1100 C were tested. The compositions were selected to form tetragonal and orthorhombic phases of zirconium-tantalum oxides. Results show that orthorhombic zirconium-tantalum oxide is more stable, both thermally and chemically in Na2SO4+V2O5 media at 1100 C, and shows a better hot corrosion resistance than the tetragonal phase. © 2013 Elsevier Ltd and Techna Group S.r.l.

Publication Source (Journal or Book title)

Ceramics International

First Page

4077

Last Page

4083

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