Lasub(0.7)Srsub(0.3)MnOsub(3-'delta') barrier for Crsub(2)Osub(3)-forming SOFC interconnect alloy coated by electrostatic spray deposition
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Surface and Coatings Technology
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In this work, electrostatic spray deposition (ESD) technology was used to deposit dense, free-cracks and thin
La0.7Sr0.3MnO3 − δ (LSM) layers on SS446 alloy interconnect to be used in solid oxide fuel cell (SOFC) after
subsequent annealing at 800 °C in air for 2 h. The corrosion resistance of uncoated and LSM-coated steels has
been studied by electrical and thermogravimetric measurements. The oxidation rate was strongly reduced for
LSM-coated steel in ambient air and pure oxygen at 800 °C for 250 h. It was found for the first time that a
dense LSM coating as thin as 300 nm efficiently reduces the oxidation rate by limiting outward Cr3+ diffusion.
A protective chromia scale was detected by SEM and EDS at the interfacial layer. The area specific resistance
(ASR) of LSM-coated SS446 was found very low (30 mΩ·cm2
) and stable in comparison with the uncoated
one (80 mΩ·cm2
) after 200 h oxidation in air at 800 °C. The results of this work demonstrate the possibility of
automated production of dense conductive interconnect LSM-coated materials and give a standard thickness
to obtain stable long-term operation.
Como referenciar
CONCEICAO, LEANDRO da; DESSEMOND, LAURENT; DJURADO, ELISABETH; MUCCILLO, E.N.S. Lasub(0.7)Srsub(0.3)MnOsub(3-'delta') barrier for Crsub(2)Osub(3)-forming SOFC interconnect alloy coated by electrostatic spray deposition. Surface and Coatings Technology, v. 254, p. 157-166, 2014. DOI: 10.1016/j.surfcoat.2014.06.005. Disponível em: http://repositorio.ipen.br/handle/123456789/22935. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.