About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Defect engineering and phase stability of MXenes for high temperatures |
| Author(s) |
Caleb Wasserbeck, Brian Wyatt, Babak Anasori |
| On-Site Speaker (Planned) |
Caleb Wasserbeck |
| Abstract Scope |
Two-dimensional transition metal carbides and nitrides known MXenes, have a unique combination of properties, including metallic conductivity, hydrophilicity, and colloidal solution stability due to their negative surface charges, and atomic level tunability. As a 2D ceramic, these materials and their properties hold great promise for applications in elevated temperatures that are not easily achieved by other classes of 2D materials. This presentation will cover MXenes’ stability in high-temperature environments. Further, scanning electron microscopy, secondary ion mass spectroscopy, and in situ x-ray diffraction techniques are used to show how introduced atomic defects can be stabilized at high temperatures by selectively occupying them with alkali cations, which inhibits the phase transition and stabilizes these 2D carbides at elevated temperatures up to 900 °C. This atomic-scale mechanism to control the phase stability of MXenes demonstrates the tunability of these materials for application in elevated temperatures. |