Mechanical aspects of ferro-elastic behavior and phase composition of La0.58Sr0.4Co0.2Fe0.8O3−δ
作者： B.X. Huang , J. Malzbender , R.W. Steinbrech , E. Wessel , H.J. Penkalla
DOI: 10.1016/J.MEMSCI.2009.11.047
关键词: Fracture (geology) 、 Bending 、 Stress (mechanics) 、 Composite material 、 Ceramic 、 Perovskite (structure) 、 Fracture toughness 、 Indentation 、 Phase (matter) 、 Materials science
摘要: Abstract Phase composition and thermo-mechanical properties of La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ (LSCF) have been studied. The LSCF perovskite material comprised two phases: rhombohedral cubic, with a ratio that showed to depend on both cooling rate as well atmosphere. fracture stress was determined the basis ring-on-ring bending tests between room temperature (RT) 800 °C. Below 700 °C non-linear load–displacement curves were obtained, an effect is attributed ferro-elasticity phase. Both SEM TEM verify existence domain structure in grains. indentation toughness appears be insensitive variations from RT up 350 °C. importance thermal history phase resulting behavior discussed.
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