Paper Title:
YZrO2-Ni Cermet Processing by High Energy Milling
  Abstract

A new method for SOFC fuel cell anode preparation is proposed where the main difference lies over cermet powder processing by high energy milling. Yttria stabilized zirconia powder and metallic nickel undergo co-milling in a vibratory device employing zirconia bead media. Dispersed and homogeneous powders are therefore obtained. The material is pressed uniaxialy and sintered at 1350°C for 0,5 h in air and under argon and hydrogen. In the former case, partial nickel oxidation occurs before sintering leading to small shrinkage down to 2% and porosity about 38%. Linear shrinkages from 5 to 7% after sintering in both inert and reduced atmospheres were observed not demanding pore-former additives. Conventional YSZ, Ni and NiO powder mixtures were prepared for comparison purpose. The high energy milling process is able to reduce the starting sintering temperature by 130° C besides a higher densification compared to the simple mixtures YSZ+Ni. The excessive sintering and particle coalescence is absent in high energy milled material, where the metal is well dispersed and the microstructure is highly homogenous. The high energy milling process is a promising route to prepare with excellent performance anode materials for SOFC cells.

  Info
Periodical
Materials Science Forum (Volumes 591-593)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
514-520
DOI
10.4028/www.scientific.net/MSF.591-593.514
Citation
T. A. G. Restivo, S. R. H. de Mello-Castanho, "YZrO2-Ni Cermet Processing by High Energy Milling", Materials Science Forum, Vols. 591-593, pp. 514-520, 2008
Online since
August 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hai Bin Li, Chang Rong Xia, Xiao Hong Fan, Xi He, Xiaoliang Wei, Guang Yao Meng
Abstract:In the development of intermediate temperature solid oxide fuel cell (IT-SOFC), the anode supported thin electrolyte with higher conductivity...
779
Authors: Yuliya Orlova, K. Maekawa, Henry J. Rack
Abstract:The present paper reports a microstructure inspection of powder fabrication of regulated structure Ti/Ti-based metal matrix composites (MMC)...
411
Authors: Yue Jun Chen, Zhi Fa Wang, Jing Long Bu, Li Xue Yu, Rong Lin Wang, Rui Sheng Wang
Chapter 1: Materials Properties
Abstract:Fused quartz powder (size<0.04mm) was used as raw material, nano-Y2O3, nano-CeO2 and...
1418
Authors: Özge Balci, Ö. Utku Demirkan, Duygu Ağaoğulları, Hasan Gökçe, Aziz Genç, M. Lütfi Öveçoğlu, Ismail Duman
Abstract:In order to improve the properties of Ni activated sintered W compacts, La2O3 was added to a W-1 wt.% Ni matrix alloy....
217
Authors: Jun Li, Wen Jie Yuan, Cheng Ji Deng, Hong Xi Zhu
Chapter 12: Ceramic, Refractory and Strong Materials
Abstract:Effect of different sintering additives on reaction-bonded Si3N4/SiC composite ceramics under pressureless was investigated. Si3N4/SiC...
2349