%0 Journal Article
%A Oliveira Silva, R.
%A Malzbender, J.
%A Schulze-Küppers, F.
%A Baumann, S.
%A Guillon, O.
%T Mechanical properties and lifetime predictions of dense SrTi 1-x Fe x O 3-δ (x = 0.25, 0.35, 0.5)
%J Journal of the European Ceramic Society
%V 37
%N 7
%@ 0955-2219
%C Amsterdam [u.a.]
%I Elsevier Science
%M FZJ-2017-02448
%P 2629 - 2636
%D 2017
%X New oxygen transport membrane materials based on SrTi1-xFexO3-δ, synthesized through solid state reaction and processed via tape casting were characterized with respect to their mechanical behaviour via depth-sensitive indentation and ring-on-ring flexural testing. The elastic moduli obtained by indentation with 1 N load for SrTi1-xFexO3-δ (x = 0.25, 0.35, 0.5) specimens were 147 ± 10 GPa, 123 ± 6 GPa and 158 ± 10 GPa, respectively. Fracture stress was accessed by ring-on-ring testing performed at 100 N/min and the obtained results were 92 ± 9 MPa, 117 ± 15 MPa, and 100 ± 15 MPa for SrTi0.75Fe0.25O3, SrTi0.65Fe0.35O3, and SrTi0.5Fe0.5O3 respectively. Ring-on-ring tests conducted at different loading rates gave access to subcritical crack growth sensitivity and aided the prediction of the materials’ lifetime through stress-time-probability diagrams, where SrTi1-xFexO3-δ (x = 0.25, 0.35, 0.5) may resist for 1 year with a failure probability of 0.1% at least 15 MPa, 22 MPa, and 12 MPa respectively.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000398753400010
%R 10.1016/j.jeurceramsoc.2017.02.038
%U https://juser.fz-juelich.de/record/828490