LaCrO3 composite coatings for AISI 444 stainless steel solid oxide fuel cell interconnects

AUTOR(ES)

Acchar, Wilson, Barreto, Ledjane Silva, Paes Junior, Herval Ramos, Cruz, Clawsio Rogerio, Feistauer, Eduardo Etzberger

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

23/10/2012

RESUMO

Doped lanthanum chromite-based ceramics are the most widely used interconnector material in solid fuel cells (SOFC) since they exhibit significant electrical and thermal conductivity, substantial corrosion resistance and adequate mechanical strength at ambient and high temperatures. The disadvantage of this material is its high cost and poor ductility. The aim of this study is to determine the mechanical and oxidation behavior of a stainless steel (AISI 444) with a LaCrO3 deposition on its surface obtained through spray pyrolisis. Coated and pure AISI 444 materials were characterized by mechanical properties, oxidation behavior, X-ray diffraction and scanning electronic microscopy. Results indicated that the coated material displays better oxidation behavior in comparison to pure stainless steel, but no improvement in mechanical strength. Both materials indicate that deformation behavior depends on testing temperatures.

Documentos Relacionados

• Comportamento de sinterização do LaCrO3 dopado com Sr e Co
• Caracterização termo-mecânica de interconectores metálicos recobertos com filmes de LaCrO3
• Development of lanthanum chromites-based materials for solid oxide fuel cell interconnects
• Síntese de pós de LaMnO3 e LaCrO3 dopados com Sr pelo método de combustão: caracterização estrutural e avaliação termodinâmica
• Effect of temperature on the level of corrosion caused by heavy petroleum on AISI 304 and AISI 444 stainless steel