Influence of porosity on mechanical properties of tetragonal stabilized zirconia

Dino Boccaccini*, Henrik Lund Frandsen, Stefano Soprani, Maria Cannio, Trine Klemensø, Vanesa Gil, Peter Vang Hendriksen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

152 Downloads (Pure)

Abstract

3YSZ specimens with variable open porosity (1–57%) were fabricated, and the stiffness, strength and fracture properties (fracture toughness and R-curve) were measured to investigate their potential use as support structures for solid oxide fuel or electrolysis cells. The ball-on-ring test was used to characterize Young's modulus and Weibull strength. The variation of fracture toughness with porosity was investigated and modelled using the results from fracture mechanical testing. A distinct R-curve behaviour was observed in dense 3YSZ specimens, in samples with a porosity around 15% and in some of the highly porous samples (porosities ∼45%) reflecting a transformation toughening in the material. For the most porous samples, the “R-curve behaviour” disappeared and subcritical crack growth was observed. The studies indicate that even highly porous 3YSZ structures (porosities exceeding 40%) are feasible supports for SOFC/SOECs from a mechanical point of view.
Original languageEnglish
JournalJournal of the European Ceramic Society
Volume38
Issue number4
Pages (from-to)1720-1735
ISSN0955-2219
DOIs
Publication statusPublished - 2018

Keywords

  • Yttria stabilized zirconia
  • Porosity
  • Mechanical properties
  • Anode supported solid oxide fuel cell

Fingerprint Dive into the research topics of 'Influence of porosity on mechanical properties of tetragonal stabilized zirconia'. Together they form a unique fingerprint.

Cite this