| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXIV
|
| Presentation Title |
Orientation Effects on the Electrically Induced Phase Transformation in Zirconia |
| Author(s) |
Muhammad Waseem Ashraf, Eric R. Homer |
| On-Site Speaker (Planned) |
Muhammad Waseem Ashraf |
| Abstract Scope |
Recently, Lai and Schuh (PRL, 2021) used a direct electric field to induce the phase transformation in paraelectric zirconia via an electric susceptibility mismatch. The actuation is a martensitic phase transformation from monoclinic to tetragonal phase. According to a thermodynamic model, the parameters affecting transformation include the enthalpy of transformation and the mismatch between the electric susceptibility of the phases. While the materials show tremendous potential, the anisotropic nature of the mismatch must be explored for the influence of orientation. This will allow discovery of optimal crystal orientations for possibly better transformation strain, more feasible transformation temperature, and lower required electric field. Since both phases have multiple variants, the relevant 12 variant-correspondences and the resulting mismatch tensors were calculated. The stress-free-strain for each variant is also calculated. Furthermore, the polycrystal averages and minimum and maximum required electric field and energy density are also presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Electronic Materials, Phase Transformations |