Effect of Co deposition on oxidation behavior and electrical properties of ferritic steel for solid oxide fuel cell interconnects
PBN-AR
Instytucja
Wydział Inżynierii Materiałowej i Ceramiki (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Thin Solid Films
ISSN
0040-6090
EISSN
1879-2731
Wydawca
Elsevier Science SA
Rok publikacji
2015
Numer zeszytu
Strony od-do
184--192
Numer tomu
590
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.64
Słowa kluczowe
EN
ferritic stainless steel
microstructure
electrical resistance
solid oxide fuel cell
metallic interconnects
protective coatings
chromia scale
pulse laser deposition
Streszczenia
Język
EN
Treść
In this work, a Co layer deposited on DIN 50049 steel by means of pulsed laser deposition was applied for the protection of solid oxide fuel cell (SOFC) interconnects operating on the cathode side. The coated and uncoated steel samples were oxidized in air at 1073 K for 500 h, and their microstructures as well as electrical resistances were evaluated using X-ray diffraction, atomic force microscopy, scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, and the 2-probe 4-point direct current method. It was demonstrated that the Co coating had reduced the oxidation rate of the steel by nearly a half. The area-specific resistance value of the coated steel was 5 × 10- 6 Ω·m2, which was significantly lower than that of bare steel after 350 h of oxidation at 1073 K. Cr vaporization tests showed that the Co coating was efficient at blocking the outward diffusion of Cr. The obtained results prove that steel coated with a thin film of cobalt was suitable for use as metallic interconnect material in SOFCs operating at intermediate temperatures. © 2015 Elsevier B.V.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:093351
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