Development of Si-free Sealing Technique for Solid Oxide Fuel Cells withLong-term Durability at High-temperatures

开发了一种无硅气体密封技术，通过弥散分布的Al中间层将YSZ与不锈钢进行液相氧化(LPO)连接。在LPO连接过程中，YSZ与Fe-Cr合金之间形成了ZrO2/Al_2O_3复合中间层。该复合中间层具有良好的氧气密封性能和较高的热循环耐久性能。此外，还证实了由NiO弥散的Al中间层形成的复合中间层具有较高的热循环耐久性。

Silicon-free gas sealing technique was developed, employing liquid-phase-oxidation (LPO) joining of yttria-stabilized zirconia (YSZ) and stainless alloy via ZrO2-dispersed Al interlayer. During the LPO-joining, the ZrO2/Al2O3 composite interlayer was formed between YSZ and Fe-Cr alloy. The composite interlayer had an excellent oxygen gas seal property, and high durability under thermal cycles. Furthermore, it was also confirmed that the composite interlayer formed via NiO-dispersed Al interlayer had high durability under thermal cycles.