Plasma-sprayed 3.9YSZ porous coatings with mille-feuille structure and high composite porosity for SOFC applications

Hann Pyng Wu, Kuan Zong Fung

研究成果: Article同行評審

摘要

A porous coating process for direct-oxidation solid oxide fuel cell (SOFC) electrodes that reduces manufacturing costs and production time is proposed. The process uses Al alloy-polyester as a pore former to create a mille-feuille structure and high porosity in plasma-sprayed 3.9mol% yttria-stabilized zirconia (3.9YSZ) coatings. With an insufficient amount of pore former (35vol.%), the as-sprayed coating surface has a higher surface roughness (Ra=12-13μm). When a sufficient amount of pore former (50vol.%) is used, the as-sprayed coating surface roughness (Ra) is 10-11μm. Apparent porosities in the range of 41.2 to 56.4vol.% are obtained for the etched and burned plasma sprayed coating. The porosity created with a sufficient amount of pore former (50vol.%) is significantly higher than that created with an insufficient amount (35vol.%). The monoclinic phase originally in the 3.9YSZ feedstock powder almost completely disappears after plasma spraying.

原文English
頁(從 - 到)132-139
頁數8
期刊Surface and Coatings Technology
228
DOIs
出版狀態Published - 2013 8月 15

All Science Journal Classification (ASJC) codes

  • 一般化學
  • 凝聚態物理學
  • 表面和介面
  • 表面、塗料和薄膜
  • 材料化學

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