| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments III
|
| Presentation Title |
High-temperature Stable Nanolamellar Transition Metal Carbides Derived from Two-dimensional MXenes for Extreme Environments |
| Author(s) |
Brian Wyatt, Kartik Nemani, Annabelle Harding, Wyatt Highland, Babak Anasori |
| On-Site Speaker (Planned) |
Brian Wyatt |
| Abstract Scope |
Two-dimensional transition metal carbides, known as MXenes, have wide use in energy storage and catalysis applications, but few studies take advantage of the inherent stability of the interior transition metal carbide core for use in extreme environment conditions. In this talk, we present the high-temperature behavior of two different MXenes of Ti3C2Tx and Mo2TiC2Tx from room temperature to 2,000 °C using in-situ up to 1,100 °C using two-dimensional x-ray diffraction (XRD2) and ex-situ XRD2 up to 2,000 °C. We also show scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and transmission electron microscopy (TEM) data to demonstrate the transformation of MXenes to nanolamellar cubic structures with strong preferential (111) plane orientation. Using these methods, our studies identify that these preferentially ordered nanolamellar phases are stable up to 2,000 °C in inert environments, which permits MXenes’ use as nanosized building blocks for ultra-high temperature coatings or ceramic composite additives. |