| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior Related to Interface Physics IV
|
| Presentation Title |
Superelastic Dissipation of Energy in Monazite Ceramics From Twin Boundary Interfaces |
| Author(s) |
Henry Q. Afful, Corinne E. Packard |
| On-Site Speaker (Planned) |
Henry Q. Afful |
| Abstract Scope |
Commonly exploited mechanical damping mechanisms have very narrow operating temperature ranges. Twinning offers an alternative damping mechanism, but only dissipates energy superelastically when elastic strain energy generated from twin boundary interfaces is stored rather than dissipated through plastic deformation. Some monazite ceramics exhibit depth recovery under nanoindentation hardness testing and reversible deformation twinning has been proposed as the origin of this recovery. The current study probes the interaction between twin boundary interfaces and the surrounding monazite lattice using spherical nanoindentation. We assessed the energies of formation and motion of twin boundaries through different monazite crystals. The amount of stress required to form twin boundary interfaces was substantially lower than that for plastic deformation and increasing the applied load increased the amount of energy dissipated by twin boundary motion. We also demonstrated that the motion of twin boundaries is reversible and persisted across multiple cycles of loading/unloading and temperature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Ceramics, High-Temperature Materials |