Table of Contents
Journal of Ceramics
Volume 2014 (2014), Article ID 713916, 5 pages
http://dx.doi.org/10.1155/2014/713916
Research Article

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

1Graduate Program on Materials Science and Engineering (PGMAT), Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil
2Department of Mechanical Engineering, Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil
3Department of Chemical Engineering, Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil

Received 6 December 2013; Revised 22 January 2014; Accepted 27 January 2014; Published 9 March 2014

Academic Editor: Thomas Graule

Copyright © 2014 V. Moreno et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

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.