About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Recent Advances in Electron Back-Scattered Diffraction and Related Techniques
|
| Presentation Title |
Investigations of Dental Zirconia Deformation Mechanisms Using EBSD Spherical Indexing |
| Author(s) |
Michael D. Roach, Kartikeya Jodha, Riya D. Titus, William Lenthe, Stuart Wright, Jason D. Griggs |
| On-Site Speaker (Planned) |
Michael D. Roach |
| Abstract Scope |
Zirconia use for dental crowns and bridges has rapidly increased as an aesthetic alternative to metal-based restorations. However, the deformation mechanisms occurring in dental zirconia microstructures are not yet fully understood. XRD analyses provide bulk phase information, but cannot quantify small, localized areas of increased strain or phase transformation around crack fronts. Traditional EBSD microstructural analyses using Hough-based indexing suffer from pseudo-symmetry issues in tetragonal and cubic zirconia phases. This study used forward-based spherical indexing EBSD to overcome these pseudo-symmetry issues and investigate zirconia deformation mechanisms occurring in crack process zones. Zirconia specimens were sintered to the manufacturer’s recommendations, polished to a 0.05 µm finish under minimal loads, and indented with 150N Vickers’ indents to generate radial cracks. EBSD analyses revealed increased residual strain in most crack process zone grains, residual strain remaining in grains experiencing tetragonal-to-monoclinic phase transformations, and evidence of monoclinic phase transformation occurring in crack bridging areas. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Ceramics, Characterization |