Optimization of the strength of SOFC anode supports
Optimization of the strength of SOFC anode supports
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DOI：
10.1016/j.jeurceramsoc.2011.11.015
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发表时间：
2012-05
影响因子：
5.7
通讯作者：
H. Frandsen;T. Ramos;A. Faes;M. Pihlatie;K. Brodersen
中科院分区：
文献类型：
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作者：
H. Frandsen;T. Ramos;A. Faes;M. Pihlatie;K. Brodersen
固体氧化物燃料电池在运行过程中受到温度梯度和各种内外机械载荷的压力，必须承受这些压力。这项工作涉及通过改变生产参数（如粉磨和烧结温度）来优化烧结阳极支撑半电池的强度。采用球环法进行了强度测试，并采用大位移有限元模型进行了分析。使用威布尔统计来描述优势的分布。发现许多不同的工艺参数对威布尔强度的影响在很大程度上可以用胞孔率来量化。结果分别通过单轴拉伸和脉冲激励技术进行了强度和刚度的独立测量。为了将这一发现应用于SOFC技术，提出了确定SOFC体系最佳孔隙度的数学框架。
During operation solid oxide fuel cells are stressed by temperature gradients and various internal and external mechanical loads, which must be withstood. This work deals with the optimization of the strength of as-sintered anode supported half-cells by imposing changes to production parameters, such as powder milling and sintering temperature. The strength was measured with the ball-on-ring method, and analyzed with a large displacement finite element model. Weibull statistics were used to describe the distribution of strengths. The influence on the Weibull strength of the many different processing parameters was found to be quantifiable in terms of cell porosity to a large extent. The results were validated with an independent set of measurements of strength and stiffness by uniaxial tension and the impulse excitation technique, respectively. For application of the finding in relation to the SOFC technology a mathematical frame to determine the optimal porosity of a SOFC system is presented.