| Texto completo | |
| Autor(es): |
da Conceicao, Leandro
[1, 2]
;
Dessemond, Laurent
[2]
;
Djurado, Elisabeth
[2]
;
Muccillo, E. N. S.
[1]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Energy & Nucl Res Inst IPEN, BR-05422970 Sao Paulo, SP - Brazil
[2] Univ Grenoble 1, Univ Savoie, CNRS, UMR 5279, Grenoble INP, LEPMI, Lab DElectrochim & Phys Chim M, F-38402 St Martin Dheres - France
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SURFACE & COATINGS TECHNOLOGY; v. 254, p. 157-166, SEP 15 2014. |
| Citações Web of Science: | 11 |
| Resumo | |
In this work, electrostatic spray deposition (ESD) technology was used to deposit dense, free-cracks and thin La0.7Sr0.3MnO3 (- delta) (LSM) layers on SS446 alloy interconnect to be used in solid oxide fuel cell (SOFC) after subsequent annealing at 800 degrees 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 degrees 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 mil.cm(2)) and stable in comparison with the uncoated one (80 m Omega.cm(2)) after 200 h oxidation in air at 800 degrees 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. (C) 2014 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 12/07648-3 - Filmes de La0,7Sr0,3Mn03δ depositados por spray eletrostático em liga de Fe-Cr aplicada como interconector de célula a combustível de óxido sólido (SOFC) |
| Beneficiário: | Leandro da Conceicao |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 11/51689-3 - Desenvolvimento de filmes de LSM suportado no interconector metálico para aplicação em células a combustível de óxido sólido (SOFC) |
| Beneficiário: | Leandro da Conceicao |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |