Stability of channeled Ni-YSZ cermets produced from self-assembled NiO-YSZ directionally solidified eutectics

被引：32

作者：

Laguna-Bercero, MA ^{[1
]}

Larrea, A ^{[1
]}

Merino, RI ^{[1
]}

Peña, JI ^{[1
]}

Orera, VM ^{[1
]}

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50018 Zaragoza, Spain

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2005年 / 88卷 / 11期

关键词：

D O I：

10.1111/j.1551-2916.2005.00540.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Channeled yttria-stabilized cubic phase of the zirconia (Ni-YSZ) cermets are produced by reduction of laser-assisted directionally solidified NiO-YSZ lamellar eutectics. The material is formed by similar to 400 nm wide alternating lamellae of 40% porous Ni and YSZ, which serve as parallel channels for gas flow and electronic transport and for oxygen ion diffusion. The low-energy interfaces formed between the metallic Ni particles and the YSZ prevent particle coarsening and impart long-term stability to the anode at operating temperatures. The electrical conductivity and the pore size distribution present no degradation after 300 h at 900 degrees C under a H-2/N-2 atmosphere. This stability is indicative of an improvement in comparison with conventional Ni-YSZ anodes for solid oxide fuel cells.

引用

页码：3215 / 3217

页数：3

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