Cu-Ni-YSZ anodes for solid oxide fuel cell by mechanical alloying processing
Cu-Ni-YSZ anodes for solid oxide fuel cell by mechanical alloying processing
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DOI：
10.3139/146.110248
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发表时间：
2010-01-01
影响因子：
0.8
通讯作者：
Mello-Castanho, Sonia R. H.
中科院分区：
文献类型：
--
作者：
Guisard Restivo, Thomaz A.;Mello-Castanho, Sonia R. H.
介绍了一种新型金属陶瓷材料40%[(Cu)-Ni]-YSZ的机械合金化和活化表面法烧结的研究结果。用于这一应用的金属陶瓷微结构预计将具有导致更好的电子和离子渗流、更高的电催化活性和燃料重整的微结构特征。通过机械合金化的优化条件制备的粉末样品为均匀的混合物。透射电子显微镜和扫描电子显微镜分析表明，球磨2 h后的粉末颗粒为纳米级，呈片状内部结构聚集。在所要求的孔隙率和微观结构范围内，从这些粉末中获得合适的烧结球。对Ni-YSZ和Ni-Cu-YSZ球团的烧结动力学研究表明，球团的烧结过程为两步法。添加铜促进了烧结，细化了显微组织。
The work shows some results concerning a new cermet material 40 vol.% [(Cu)-Ni]-YSZ processed by mechanical alloying followed by Sintering by Activated Surface method. The projected cermet microstructure for this application is expected to possess microstructural characteristics that lead to better electric and ionic percolating, higher electrocatalytic activity and fuel reforming. The powder samples prepared by mechanical alloying optimized conditions show a homogeneous mixture. Transmission and scanning electron microscope analysis have demonstrated the powder particles are nanosized after 2 h of milling, showing lamellar internal structure aggregates. Suitable sintered pellets are obtained from these powders, within the required porosity and microstructure. Sintering kinetics studies for pellets of Ni-YSZ and Ni-Cu-YSZ indicate 2-step sintering processes. Copper additive promotes sintering and refines the microstructure.