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研究了固体氧化物燃料半电池在800℃模拟环境下阳极支撑材料的还原过程,分析讨论了还原程度、微观组织以及电解质薄膜中残余应力等随还原时间的变化规律,得到了NiO-YSZ半电池还原程度随还原时间的完整变化曲线.能谱分析表明:氧元素质量分数随还原时间的增加而减少,最低值为13.24%;镍元素质量分数随还原时间的增加而不断增多,最高值为49.56%;X射线应力分析发现:在还原过程中,电解质薄膜中的残余应力随还原时间的增加而逐渐变小,当还原时间达到12h后,薄膜中的残余压应力值为394.35MPa,降低到还原前残余应力的48.54%;扫描电镜观察发现:还原结束后,阳极支撑材料的微观结构中孔隙率增大.

参考文献

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