| Full text | |
| Author(s): |
da Conceicao, Leandro
[1, 2]
;
Dessemond, Laurent
[2]
;
Djurado, Elisabeth
[2]
;
Muccillo, E. N. S.
[1]
Total Authors: 4
|
| Affiliation: | [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
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | SURFACE & COATINGS TECHNOLOGY; v. 254, p. 157-166, SEP 15 2014. |
| Web of Science Citations: | 11 |
| Abstract | |
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) | |
| FAPESP's process: | 12/07648-3 - La0,7Sr0,3MnO3δ films deposited by electrostatic spray on Fe-Cr alloy applied as interconnect of solid oxide fuel cell (SOFC) |
| Grantee: | Leandro da Conceicao |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |
| FAPESP's process: | 11/51689-3 - Development of supported LSM films in metal interconnector for application in solid oxide fuel cells (SOFC) |
| Grantee: | Leandro da Conceicao |
| Support Opportunities: | Scholarships in Brazil - Post-Doctorate |