Mechanical Behavior of Yttria-Stabilized Zirconia Aqueous Cast Tapes and Laminates

Abstract EN

Aqueous tape casting was used to produce yttria-stabilized zirconia films for electrolyte-supported solid oxide fuel cell (SOFC).

Tape casting slurries were prepared varying the binder content between 20 and 25 wt%.

A commercial acrylic emulsion served as binder.

Rheological measurements of the two slurries were performed.

Both slurries showed a shear-thinning behavior.

Tapes with 25 wt% binder exhibited adequate flexibility and a smooth and homogeneous surface, free of cracks and other defects.

Suitable conditions of lamination were found and a theoretical density of 54% in the laminates was achieved.

Laminated tapes showed higher tensile strength compared to single sheets.

Tape orientation has a significant influence on the mechanical properties.

Tensile strength, elongation to strain, and Young’s modulus measured in samples produced in the direction of casting showed higher property values.