Paper Title:
Slow Crack Growth and Creep Rupture of Ba0.5Sr0.5Co0.8Fe0.2O3 – δ
  Abstract

Ba0.5Sr0.5Co0.8Fe0.2O3 – δ is a mixed ion-electron conductor with high application potential as high-temperature gas separation membrane. However, in practical use the integrity of this brittle perovskite is challenged by the mechanical boundary conditions of transient temperature exposure. Moreover, long term failure mechanisms such as static fatigue at room temperature and creep rupture at operation temperature might occur. The relevance of both effects for BSCF has been investigated. The slow crack growth at room temperature has been determined using bi-axial bending under different loading rates. The creep rupture at elevated temperature has been analyzed from three-point bending tests. The results indicate favourable behaviour of BSCF in both cases. A low risk of failure due to slow crack growth exists and the strain to failure in combined tensile - compressive mode reaches up to 40 %.

  Info
Periodical
Key Engineering Materials (Volumes 488-489)
Edited by
Z. Tonković and M.H. Aliabadi
Pages
303-306
DOI
10.4028/www.scientific.net/KEM.488-489.303
Citation
J. Malzbender, G. Pećanac, S. Baumann, "Slow Crack Growth and Creep Rupture of Ba0.5Sr0.5Co0.8Fe0.2O3 – δ", Key Engineering Materials, Vols. 488-489, pp. 303-306, 2012
Online since
September 2011
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