Steady state creep of Ni-8YSZ substrates for application in solid oxide fuel and electrolysis cells
Steady state creep of Ni-8YSZ substrates for application in solid oxide fuel and electrolysis cells
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DOI：
10.1016/j.jpowsour.2017.05.113
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发表时间：
2017-08
影响因子：
9.2
通讯作者：
Jianping Wei;J. Malzbender
中科院分区：
文献类型：
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作者：
Jianping Wei;J. Malzbender
对Ni-8YSZ固体氧化物燃料/电解槽(SOFC/SOEC)基板材料的稳态蠕变进行了表征。评估了影响蠕变行为的内在和外在因素，如组成比、孔隙率和机械加载结构。力学试验得到了分析和数值计算的支持。结果表明，在压缩蠕变和拉伸蠕变条件下，蠕变机制均以扩散为主。蠕变以陶瓷相为主。孔洞显著降低了材料的蠕变抗力。讨论了加载方式、温度和孔隙率对活化能的影响。
Steady state creep was characterized for Ni-8YSZ solid oxide fuel/electrolysis cell (SOFC/SOEC) substrate material. Intrinsic and extrinsic factors affecting creep behavior were assessed, such as compositional ratio, porosity and mechanical loading configuration. Mechanical tests were supported by analytical and numerical calculations. The results indicated a diffusion-dominated creep mechanism under both compressive and tensile creep conditions. Creep appeared to be dominated by the ceramic phase. Porosity significantly reduced creep resistance. The activation energy was discussed based on loading configuration, temperature and porosity.