1995
DOI: 10.1007/bf01153057
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High temperature mechanical properties of La1?x Sr x Cr1?y Co y O3 for SOFC interconnect

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Cited by 26 publications
(21 citation statements)
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“…Both materials exhibited very similar behavior, regardless of temperature. Strength values of the composite materials at ambient temperature are higher when compared to LaCrO 3 (180-260 MPa) 4 , but similar at 900 °C (50-100 MPa) 10 . At 900 °C, the materials display significantly higher deformation values in comparison to ambient temperature, which is characteristic of metallic behavior ( Figure 5).…”
Section: Methodsmentioning
confidence: 92%
See 1 more Smart Citation
“…Both materials exhibited very similar behavior, regardless of temperature. Strength values of the composite materials at ambient temperature are higher when compared to LaCrO 3 (180-260 MPa) 4 , but similar at 900 °C (50-100 MPa) 10 . At 900 °C, the materials display significantly higher deformation values in comparison to ambient temperature, which is characteristic of metallic behavior ( Figure 5).…”
Section: Methodsmentioning
confidence: 92%
“…The interconnector must be also compatible with all cell components 3 and stable with respect to oxiding and reducing gases, present in the SOFC. Typical requirements of an interconnect material are: high electronic conductivity, chemical stability, thermal expansion match to other cell components, significant mechanical strength and-thermal conductivity, low manufacturing and material costs 4,5 .Lanthanum chromite (LaCrO 3 ) doped with calcium, strontium and magnesium is the most viable material, since it exhibits relatively high electronic conductivity in both fuel and oxidant atmospheres, moderate stability in fuel cell environments and good compatibility with other cell components in terms of phase, microstructure and thermal expansion 1,4,16,17 . Reducing cell operating temperature from 1000 °C to 800 °C makes using metallic materials as interconnects an attractive alternative.…”
Section: Introductionmentioning
confidence: 99%
“…Composições La 1-x Sr x Cr 1-y Co y O 3 apresentaram valores de resistência mecânica e de dureza de 62 MPa e 5,98 GPa, respectivamente [41], e módulo de Weibull, a 1000 °C, de 9,7, mostrando boa confiabilidade nos resultados [42], com modos de fratura inter e transgranulares para comportamento de deformação frágil [41].…”
Section: Expansão Térmica E Resistência Mecânicaunclassified
“…A função dos dopantes (Sr e Co) adotados neste trabalho tem o seguinte objetivo: o Sr é adicionado para melhorar as propriedades elétricas e o Co para melhorar o comportamento de sinterização favorecendo a densificação, além disso, sabese que a adição de Co é o modo mais efetivo de se aumentar o coeficiente de expansão térmica [5,24,42,52,91].…”
Section: Aplicaçõesunclassified
“…E assim, o objetivo deste trabalho foi verifi car a infl uência do tempo, da temperatura e da concentração dos aditivos de sinterização, Sr e Co, no comportamento de densifi cação do LaCrO 3 . Além de favorecerem a sinterização do material, a adição do Sr melhora as propriedades elétricas e a adição de Co sabe-se que é o mais efetivo método de se aumentar o coefi ciente de expansão térmica [22,23,[47][48][49]. [42,50,51].…”
Section: Introductionunclassified