Elastic properties of freeze-cast La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ

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• 作者：Ying Zou^a ; Wakako Araki^b ; Maria Balaguer^a ; Jü ; rgen Malzbender^a ; ^{j.malzbender@fz-juelich.de" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Elastic properties ; LSCF ; Ceramics ; Porous ; Freeze-cast ; Ferroelastic
• 刊名：Journal of the European Ceramic Society
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：36
• 期：7
• 页码：1651-1657
• 全文大小：2585 K

文摘

Apparent Young’s, shear and bulk moduli and Poisson’s ratio of freeze-cast La_0.6Sr_0.4Co_0.2Fe_0.8O_3–δ (LSCF), envisaged as porous substrate for dense LSCF oxygen transport layers, were investigated at room temperature by a quasi–static hysteresis compression test as a function of the longitudinal strain which was measured in longitudinal direction. Ferroelastic domains were confirmed via electron microscopy. The apparent elastic parameters showed extrema related to ferroelastic domain switching. Apparent Young’s and shear moduli revealed minimum values, while bulk modulus and Poisson’s ratio demonstrated maximum values due to the transverse strain contributed by ferroelastic domain switching. Results are discussed with respect to the behavior and values of the elastic parameters that has been reported previously for dense LSCF.