Suspension Plasma Spraying of Intermediate Temperature SOFC Components Using an Axial Injection DC Torch

Jorg Oberste Berghaus; Jean Gabriel Legoux; Christian Moreau; Rob Hui; Dave Ghosh

doi:10.4028/www.scientific.net/MSF.539-543.1332

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Fuell Cell and Hydrogen Vehicles - State of the Art and Challenges for Improved Materials
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HomeMaterials Science ForumMaterials Science Forum Vols. 539-543Suspension Plasma Spraying of Intermediate...

Suspension Plasma Spraying of Intermediate Temperature SOFC Components Using an Axial Injection DC Torch

Abstract:

Intermediate temperature SOFC components, such as dense, nanostructured SDC electrolytes (samarium doped ceria) and porous anode sublayers were fabricated by suspension plasma spraying using an axial feed dc plasma torch. The liquid carrier employed in this approach allowed for controlled injection of much finer particles than in conventional thermal spraying, leading to thin coatings with a refined microstructure. Dense, thin (<10(m) and non-fractured electrolytes were created. Various processing routes for SOFC half-cells, using tape-cased, plasmasprayed and suspension-sprayed anodes, were explored. Loss of integrity and non-continuous coverage of the anode constituted the principal difficulties in the subsequent electrolyte deposition. The role of suspension feedstock particle size is discussed. Amongst various schemes investigated, a processing route that employs sequential suspension plasma spraying steps for both the electrolyte and the anode, using relatively large primary particles in the feedstock, constituted the most promising approach.

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Materials Science Forum (Volumes 539-543)

Pages:

1332-1337

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.1332

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Online since:

March 2007

Authors:

Jorg Oberste Berghaus, Jean Gabriel Legoux, Christian Moreau, Rob Hui, Dave Ghosh

Keywords:

Air-Plasma Spraying, Intermediate Temperature SOFC, Nanostructured Coating, Suspension Plasma Spraying

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