Artículo de revista
Room temperature ferroelastic creep behavior of porous (La0.6Sr0.4)(0.95)Co0.2Fe0.8O3-delta
Fecha
2020Registro en:
Processes 2020, 8, 1346
10.3390/pr8111346
Autor
Arnauda, Bárbara
Akbari Fakhrabadi, Ali
Orlovskaya, Nina
Meruane Naranjo, Viviana
Araki, Wakako
Institución
Resumen
The time-dependent deformation of porous (La0.6Sr0.4)(0.95)Co0.2Fe0.8O3-delta (LSCF) under constant uniaxial compressive stress at room temperature has been studied. Both axial and lateral stress-strain deformation curves clearly show the non-linear ferroelastic behavior of LSCF perovskite during compression. The ferroelastic characteristics of deformation curves such as coercive stress and apparent loading moduli decrease when the porosity of the samples increases. Ferroelastic creep deformations at applied stresses of 25 and 50 MPa demonstrate that stress and porosity are influencing factors on creep deformation, which increases with increasing stress and porosity. A negative creep or axial expansion and lateral contraction were observed in the sample with 35% porosity under 50-MPa constant compression stress.