| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
|
| Presentation Title |
Engineering Far-from-Equilibrium Materials
Using Electromagnetic Fields |
| Author(s) |
B. Reeja Jayan, Nathan Nakamura, Laisuo Su, Shikhar Jha |
| On-Site Speaker (Planned) |
B. Reeja Jayan |
| Abstract Scope |
This talk will describe our lab’s efforts to merge exploratory experiments and computation with data-driven methods to define new thermodynamic foundations that better explain the behavior of groups of atoms under externally applied fields. We used high-resolution synchrotron x-ray studies to demonstrate the first experimental evidence that 2.45 GHz microwave fields stabilize a different atomic structural arrangements or phase(s) in ceramics like TiO2,ZrO2 compared to conventional, high temperature furnace based synthesis. Through a combination of in-situ and ex-situ characterization, as well as atomistic simulations, we show that externally applied fields can induce far-from-equilibrium phases in ceramics via a defect-mediated, field-driven, non-thermal effect. Our work thus lays the theoretical foundations for deploying electromagnetic fields as a new processing tool to access high temperature ceramic phases with minimal thermal input; allowing us to explore regions of phase space, microstructures, and properties not accessible via conventional synthesis. |