About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
On the Interphase Compatibility of LaNbO<sub>4</sub>-Based Shape Memory Ceramics |
| Author(s) |
Cesar I. Martinez-Cruz, Olivia A. Graeve |
| On-Site Speaker (Planned) |
Cesar I. Martinez-Cruz |
| Abstract Scope |
Shape memory materials are vital in advanced technologies due to their adaptive properties by martensitic transformations. These solid-to-solid transformations generate bulk stresses and elastic strains that affect cyclic transition. Introducing controlled crystal defects can minimize these transformation stresses, enabling optimization toward a near-perfect microstructure interphase matching, known as crystallographic compatibility. While this approach has been extensively applied to shape memory alloys, this concept is now being extended to shape memory ceramics, such as LaNbO<sub>4</sub> which undergoes a temperature-driven tetragonal to monoclinic martensitic transformation. This work investigates how compositional modifications affect the interphase compatibility of LaNbO<sub>4</sub>-based ceramics through partial substitution of Nb<sup>5+</sup> with isovalent cations (V<sup>5+</sup>, Ta<sup>5+</sup>, As<sup>5+</sup>, or Sb<sup>5+</sup>) at concentrations below 30 at.%. Our findings advance the fundamental understanding of martensitic transformations beyond metallic systems and contribute to a unified theoretical framework for reversible phase transformations in functional ceramics. |
| Proceedings Inclusion? |
Planned: |