篇名 | 網印La□Sr□Co□Fe□O₃塗層對2205DSS高溫空氣氧化之作用 |
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卷期 | 24:2 |
並列篇名 | Effect of an LSCF Protective Coating on High Temperature Air Oxidation of 2205DSS |
作者 | 王朝正 、 林韋杉 |
頁次 | 083-092 |
關鍵字 | 2205雙相不銹鋼 、 高溫氧化 、 Cr-Mn spinel 、 Cr₂O₃ 、 2205 duplex stainless steel 、 High-temperature oxidation 、 EI |
出刊日期 | 201006 |
本研究使用作為固態氧化物燃料電池(SOFC)雙極板的2205 雙相不銹鋼(2205DSS)為材料,以網印方式披覆La0.6Sr0.4Co0.2Fe0.8O3 (LSCF)塗層,再經1000 °C 氮氣氣氛高溫燒結後於
800 °C 空氣氣氛,探討2205DSS 與2205LSCF 的高溫氧化差異。實驗結果顯示,2205LSCF
經1000 °C 氮氣氣氛燒結,LSCF 相穩定且塗層與合金底材附著性良好。塗層與合金底材界
面間僅生成單層且薄的Cr-Mn spinel 氧化物。於800 °C 高溫氧化,2205LSCF 中的2205DSS
因有LSCF 塗層的保護,可有效阻礙氧離子擴散通過塗層到達合金界面,進而降低2205LSCF
的氧化皮膜成長速率。
Duplex stainless steels (e.g. 2205DSS) are being considered as potential interconnect materials for solid oxide fuel cells. The effect of
La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) coating on the electric properties and oxidation resistance of a 2205DSS alloy was examined in air. The 2205DSS
alloy was coated with an LSCF layer (2205LSCF) via a screen printing process and was then sintered at 1000 °C. When the 2205LSCF sample was sintered in an N2 atmosphere, the LSCF coating layer exhibited phase stability, and only a thin Cr-Mn-spinel scale formed at the LSCF layer/alloy interface. The LSCF layer prevented oxygen from reacting with the alloy, and as a result the oxidation rate of 2205LSCF was lower than that of 2205DSS at 800 °C in air.