Subcritical Crack Growth Behavior of A Perovskite‐Type Oxygen Transport Ceramic Membrane
作者： Nagendra Nagabhushana , Thangamani Nithyanantham , Sukumar Bandopadhyay , Jing Zhang
DOI: 10.1111/J.1744-7402.2009.02440.X
关键词:
摘要: We herein report subcritical crack growth (SCG) studies of La0.2Sr0.8Fe0.8Cr0.2O3−δ (LSFCO) perovskite membranes as oxygen transport (OTM). Two sample batches were tested to investigate the effect temperature, specific chemical environments, and loading rate on flexure strengths, using four-point bend tests. The first batch was examined at room temperature in air. second soaked an N2/air atmosphere 1000°C. Stress rates varied approximately from 0.2 90 MPa/s. strength–probability–time diagram is constructed for design proposes. Flexural strength data indicate that OTM material showed little susceptibility SCG However, susceptible environment Also, experiments demonstrate flexural-strength dependency, with increasing stress rate. observed phenomena are explained by decomposition microstructural transitions perovskite.
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