Journal Article

FZJ-2018-05898

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Creep Behaviour of Dense and Porous SrTi0.75Fe0.25O3-δ for Oxygen Transport Membranes and Substrates

Oliveira Silva, R.FZJ* ; Malzbender, J. (Corresponding author)FZJ* ; Schulze-Küppers, F.FZJ* ; Baumann, S.FZJ* ; Krüger, M.FZJ* ; Guillon, O.FZJ*

2018
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jeurceramsoc.2018.07.030

Abstract: Considering the challenging conditions imposed by application of membranes in an asymmetric design, in particular creep resistance of the substrate material is an important parameter for the stability in long-term operation. As promising material, in terms of chemical stability, the perovskite SrTi0.75Fe0.25O3-δ has been identified in previous works. Porous supports with different microstructures have been produced using different manufacturing methods and compared to the material in its fully dense state regarding creep behaviour. The creep deformation of pressed, porous tape-cast and freeze-dried SrTi0.75Fe0.25O3-δ specimens has been investigated in the application relevant temperature range of 850–1000 °C under compressive stresses of 15, 30 and 45 MPa. A global fitting method considering all experimental data was used to derive stress exponent and activation energy of SrTi0.75Fe0.25O3-δ, which are 2.9 ± 0.4 and 402 ± 25 kJ/mol, respectively. Thus, it is suggested that the mechanism controlling creep is mainly related to dislocation climb/glide.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)
2. Werkstoffstruktur und -eigenschaften (IEK-2)
3. JARA-ENERGY (JARA-ENERGY)

Research Program(s):

1. 111 - Efficient and Flexible Power Plants (POF3-111) (POF3-111)

Appears in the scientific report 2018

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Database coverage:
Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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