Improvement of strength of anode-substrate material of hydrogen and hydrocarbonic solid oxide fuel cells

Keywords

ceramics of ZrO₂–Y₂O₃–CeO₂–Al₂O₃–NiO–CuO system, redox cycling, hydro­ge-containing environment, carbon dioxide, strength.

Cite as

Vasyliv B. D., Podhurska V. Ya., Ostash O. P., Danilenko I. A., and Shylo A. V. Improvement of strength of anode-substrate material of hydrogen and hydrocarbonic solid oxide fuel cells. Physico­chemical Mechanics of Materials. 2022. 58(2), 059-065.

Abstract

The microstructure, strength and fracture micromechanisms of 50%(ZrO₂–4 mol% Y₂O₃–2 mol% CeO₂–2 wt.% Al₂O₃)–50% (NiO–5 wt.% CuO) ceramics in the as-sintered state, after one-time reduction and after developed cyclic redox treatment at 600°C in Ar–5 vol.% H₂ and N₂–10 vol.% H₂–5 vol.% CO₂ gas mixtures have been studied. It is shown that the increased strength of cermets of this system is due to lowering Y₂O₃ content from traditi­onal 8mol% to 4mol%, as well as about 2 time decrease in grain size of the initial nickel phase after redox cycling. The efficiency of such treatment to improve the properties of the anode-substrate for hydrogen and hydrocarbon solid oxide fuel cells is confirmed.

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