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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

La0.7Sr0.3MnO3 (- delta) barrier for Cr2O3-forming SOFC interconnect alloy coated by electrostatic spray deposition

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-Doctoral