High Temperature Strength and Elastic Properties of Doped Ceria under Various Oxygen Partial Pressures Electrolyte Materials
High Temperature Strength and Elastic Properties of Doped Ceria under Various Oxygen Partial Pressures Electrolyte Materials
复制标题
不同氧分压下掺杂二氧化铈电解质材料的高温强度和弹性性能
DOI：
10.1149/06801.0375ecst
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. Hashida
中科院分区：
文献类型：
--
作者：
T.Taguchi;S. Watanabe;K. Sato;T. Hashida
脆性部件在操作条件下的机械耐久性对于确保固态电化学装置（例如固体氧化物燃料电池（SOFC））的可靠性极其重要。在SOFC的情况下，组件暴露于高温、高和低氧分压以及由启动和停止引起的快速环境变化;因此，预计机械故障是由热和化学引起的应力引起的（1）由SOFC组件之间的膨胀或收缩失配引起的应力。为了防止意外的故障，表征在不仅热环境而且化学环境下的机械性能的变化对于可靠和持久的SOFC操作是至关重要的，然而由于技术的限制，还没有对其进行检查，SOFC部件的机械性能的评估通常在室温下（2-7）或仅在受控温度下（8-11）在空气中进行。在SOFC运行环境下的机械测试已经引起了很大的关注;开始研究SOFC部件的弹性性能。分析氢环境影响的常规方法是使用在氢气下热处理的试样（12-14）。Wang等人（12）测量了氧浓度对热处理CeO 2和Ce 0的弹性模量的影响。9Gd0。101. 95-δ在各种低氧分压下的纳米压痕试验。然而，该方法具有试样的再氧化的缺点。还原的再氧化
Mechanical endurance of brittle components under operating conditions is extremely important to ensure reliability of solid-state electrochemical devices such as Solid Oxide Fuel Cell (SOFC). In the case of SOFC, components are exposed to high temperatures, both high and low oxygen partial pressures and rapid environmental changes induced by starts and stops; thereby it is anticipated that the mechanical failure is induced by thermally and chemically (1) induced stresses arising from expansion or contraction mismatches between SOFC components. To prevent unexpected failures, it is critical to characterize changes in mechanical properties under not only thermal but also chemical environment for reliable and durable SOFC operations, however it has not been examined because of limitation of technique, evaluation of the mechanical properties of the SOFC components were often carried out in air at room temperature (2-7) or under controlled only temperature (8-11).Recently, much attention has focused on mechanical testing under SOFC operation environment; the elastic properties of the SOFC component are starting to be investigated. A conventional method for the analysis of the effect of hydrogen environment is using specimen heat-treated under hydrogen gas (12-14). Wang et al (12) measured the effect of oxygen concentration on the elastic modulus of heat treated CeO2 and Ce0. 9Gd0. 1O1. 95-δ under various low oxygen partial pressures by nanoindentation tests. However, this method has the disadvantages of re-oxidation of the specimen. Re-oxidation of reduced