| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
N-16: Pseudoelastic Response and Shape Memory Behavior in Ceramic Materials |
| Author(s) |
Hamed Hosseini-Toudeshki, Steven Herrera, David Kisailus, Olivia A. Graeve |
| On-Site Speaker (Planned) |
Hamed Hosseini-Toudeshki |
| Abstract Scope |
We describe the pseudoelastic response and shape memory behavior of LaNbO<sub>4</sub> ceramic materials under compressive forces utilizing nano-indentation. Shape memory ceramics are smart materials with unique properties and diverse applications such as mechanical damping systems, actuation and sensors. Compared with alloys, ceramics offer valuable advantages such as the ability to operate at higher temperatures. Smart ceramic materials with pseudoelastic mechanical behavior have gained attention recently due to their unusual reversible response upon uniaxial stresses or thermal loads without fracture. In this study, two different pseudoelastic responses have been observed (step-like response and rubber-like behavior) on single crystal and polycrystalline pillars of LaNbO<sub>4</sub>. A combination of shape memory behavior (under thermal loads) and pseudoelastic cycles (under mechanical loads) up to 10% recoverable strain are achieved during micro-compression experiments. To avoid mismatch stresses during phase transformation, experiments were performed on micrometer-sized pillars fabricated from bulk ceramics using focused ion beam technology. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |