About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanocomposite Materials: Innovations in Design, Fabrication, and Applications
|
| Presentation Title |
Design Nanocomposite Materials to Achieve Properties beyond Rule-of-Mixture Limit: Modeling and Mechanism |
| Author(s) |
Yongmei M. Jin, Yu U. Wang |
| On-Site Speaker (Planned) |
Yu U. Wang |
| Abstract Scope |
Composites allow more freedom in choosing material compositions. However, their properties are usually the weighted averages of the properties of individual constituents (rule of mixtures). This limits our ability to improve specific properties for targeted applications, e.g., sensors, actuators, energy harvesters, etc. This presentation demonstrates that when the constituents strongly interact with each other in nanocomposites, nonlinear behaviors can be brought about, leading to properties beyond the rule-of-mixture limit. This approach is exemplified by ferroelectric-antiferroelectric nanocomposites, where significantly enhanced dielectric and piezoelectric properties are obtained, greatly exceeding the predictions from the rule of mixtures. Domain-level phase field modeling is employed to elucidate the structure-property relationships of the nanocomposites, which reveals a depolarization mechanism responsible for the property enhancement. In particular, the depolarization fields associated with antiferroelectric nanograins lead to strong electrostatic interactions between antiferroelectric and ferroelectric nanograins, resulting in significantly enhanced properties. Agreement between the theory and experiment is discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Computational Materials Science & Engineering, Modeling and Simulation |