TY - JOUR
T1 - Plasma-sprayed 3.9YSZ porous coatings with mille-feuille structure and high composite porosity for SOFC applications
AU - Wu, Hann Pyng
AU - Fung, Kuan Zong
N1 - Funding Information:
This work was funded by the Taiwan's National Science Council (grant NSC 100-2221-E-006-246-MY2 ). The authors acknowledge the support from the Aero Engine Factory/Aerospace Industrial Development Corporation, Taiwan, and would like to thank Professor M. H. Hon for comments regarding the manuscript.
PY - 2013/8/15
Y1 - 2013/8/15
N2 - 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.
AB - 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.
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U2 - 10.1016/j.surfcoat.2013.04.019
DO - 10.1016/j.surfcoat.2013.04.019
M3 - Article
AN - SCOPUS:84879460721
VL - 228
SP - 132
EP - 139
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
SN - 0257-8972
ER -