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首页> 外文会议>International symposium on solid oxide fuel cells >CHROMIUM VAPORIZATION FROM METALLIC INTERCONNECT AND RETENTION BY PEROVSKITE LAYERS
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CHROMIUM VAPORIZATION FROM METALLIC INTERCONNECT AND RETENTION BY PEROVSKITE LAYERS

机译：从金属互连的铬蒸发和钙钛矿层的保持

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摘要

Chromium-based alloys like the oxide-dispersion-strengthened (ODS) alloy Cr5Fe1Y_2O_3 are suitable materials for the metallic interconnect of solid oxide fuel cells (SOFCs). The vaporization of volatile chromium species from chromium-containing alloys (such as Cr5Fe1Y_2O_3) on the cathode side of the SOFC leads to a rapid degradation of the electrical properties of the cell. Acceptor-doped perovskites based on LaCrO_3 are considered as coating materials in order to prevent chromium vaporization from metallic interconnects. In the present paper, the chromium evaporation rate of the uncoated ODS alloy Cr5Fe1Y_2O_3 is compared with the amount of chromium vaporizing from the La_(0.9)Sr_(0.1)CrO_3-coated sample. Chromium vaporization rates were determined by the transpiration method under cathodic SOFC conditions (T = 950°C, p[H_2O] = 0.02 bar, p[O_2] = 0.21 bar). Moreover, chromium diffusion coefficients in perovskite layers (La_xSr_(1-x)CrO_3, La_xCa_(1-x)CrO_3) were derived by using a ~(53)Cr tracer technique.
机译：铬基合金，如氧化物 - 分散 - 强化（ODS）合金CR5Fe1Y_2O_3是用于固体氧化物燃料电池（SOFC）的金属互连的合适材料。在SOFC的阴极侧的含铬合金（例如Cr5Fe1Y_2O_3）的挥发性铬物质的蒸发导致电池的电性能的快速降解。基于Lacro_3的受体掺杂的Perovskites被认为是涂层材料，以防止金属互连的铬蒸发。在本文中，将未涂覆的ODS合金CR5FE1Y_2O_3的铬蒸发速率与来自LA_（0.9）SR_（0.1）CRO_3涂覆的样品的铬蒸发量进行比较。通过在阴极SOFC条件下的蒸发方法测定铬蒸发速率（T = 950℃，P [H_2O] = 0.02巴，P [O_2] = 0.21巴）。此外，通过使用〜（53）CR示踪技术来导出钙钛矿层中的铬扩散系数（LA_SR_（1-x）CRO_3，LA_CA_（1-x）CRO_3）。

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