✦ LIBER ✦

A promising NiCo2O4 protective coating for metallic interconnects of solid oxide fuel cells

✍ Scribed by Bin Hua; Wenying Zhang; Juan Wu; Jian Pu; Bo Chi; Li Jian

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 492 KB
Volume: 195
Category: Article
ISSN: 0378-7753
DOI: 10.1016/j.jpowsour.2010.05.031

No coin nor oath required. For personal study only.

✦ Synopsis

The NiCo 2 O 4 spinel coating is applied onto the surfaces of the SUS 430 ferritic stainless steel by the sol-gel process; and the coated alloy, together with the uncoated as a comparison, is cyclically oxidized in air at 800 • C for 200 h. The oxidation behavior and oxide scale microstructure as well as the electrical property are characterized. The results indicate that the oxidation resistance is significantly enhanced by the protective coating with a parabolic rate constant of 8.1 × 10 -15 g 2 cm -4 s -1 , while the electrical conductivity is considerably improved due to inhibited growth of resistive Cr 2 O 3 and the formation of conductive spinel phases in the oxide scale.

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