Abstract
The residual stresses in a dense yttria-stabilized zirconia (YSZ) layer bonded to a porous NiO-YSZ substrate were measured by X-ray diffraction in air between 25°C and 900°C. It was found that the residual stresses on the outer surface of the YSZ layer were compressive, that their magnitude increased with decreasing temperature, and that the temperature dependence was nonlinear particularly at temperatures below 600°C. An elastic model that incorporates micromechanics and laminate theory was formulated to successfully predicts the nonlinearity of the temperature dependence of the residual stresses by accounting for the effect of the order-disorder transition experienced by YSZ around 600°C and the magnetic transition of NiO at the Néel temperature around 265°C, on the properties of these materials. The implications of the results for the reliability of solid oxide fuel cells are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 1014-1022 |
| Number of pages | 9 |
| Journal | Journal of the American Ceramic Society |
| Volume | 104 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2021 |
Funding
This manuscript has been authored by UT‐Battelle, LLC, under contract DE‐AC05‐00OR22725 with the US Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid‐up, irrevocable, world‐wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe‐public‐access‐plan ). This research work was sponsored by the US Department of Energy, Fossil Energy Program, Solid Oxide Fuel Cells Program at ORNL under contract DE-AC05-00OR22725 with UT-Battelle, LLC. The authors thank National Energy Technology Laboratory program managers Rin Burke and Shailesh D. Vora for guidance and support, Randy Parten and Tom Geer of ORNL for assistance in the preparation of test specimens, Michael Lance and Yousub Lee of ORNL for reviewing the manuscript and Chun-Hway Hsueh of the National Taiwan University for valuable discussions. Antonio Macias participated in this investigation by an appointment to the Oak Ridge National Laboratory HERE Program, sponsored by the US Department of Energy and administered by the Oak Ridge Institute for Science and Education, while he was an undergraduate student at the University of California-Berkeley. The authors thank their colleagues at Fuel Cell Materials for a special order to prepare dense NiO disks for experimental measurements. This research work was sponsored by the US Department of Energy, Fossil Energy Program, Solid Oxide Fuel Cells Program at ORNL under contract DE‐AC05‐00OR22725 with UT‐Battelle, LLC. The authors thank National Energy Technology Laboratory program managers Rin Burke and Shailesh D. Vora for guidance and support, Randy Parten and Tom Geer of ORNL for assistance in the preparation of test specimens, Michael Lance and Yousub Lee of ORNL for reviewing the manuscript and Chun‐Hway Hsueh of the National Taiwan University for valuable discussions. Antonio Macias participated in this investigation by an appointment to the Oak Ridge National Laboratory HERE Program, sponsored by the US Department of Energy and administered by the Oak Ridge Institute for Science and Education, while he was an undergraduate student at the University of California‐Berkeley. The authors thank their colleagues at Fuel Cell Materials for a special order to prepare dense NiO disks for experimental measurements.
| Funders | Funder number |
|---|---|
| US Department of Energy | |
| University of California-Berkeley | |
| U.S. Department of Energy | |
| Oak Ridge National Laboratory | DE‐AC05‐00OR22725 |
| Oak Ridge Institute for Science and Education | |
| National Energy Technology Laboratory |
Keywords
- Neél temperature
- SOFCs
- YSZ
- bilayer
- magnetic transition
- model
- nickel oxide
- order-disorder transitions
- residua stresses
- solid oxide fuel cells
