About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
| Presentation Title |
Thermal Stability and Morphological Transformation of MXene/SiOC Interface: An In-Situ HRTEM Study |
| Author(s) |
Mubina Shaik, Tim Pieshkov, Abhijit Biswas, Ajayan Pulickel, Kathy Lu |
| On-Site Speaker (Planned) |
Mubina Shaik |
| Abstract Scope |
This study investigates the morphological transformation at the MXene/SiOC interface using in-situ high-resolution transmission electron microscopy (HRTEM) under controlled thermal conditions. MXene (Ti₃C₂Tₓ) was synthesized in-house via selective etching of the Al layer from the Ti₃AlC₂-MAX phase, followed by exfoliation. X-ray diffraction (XRD) analysis confirmed the formation of few-layered MXene sheets. Simultaneously, bulk SiOC samples were pre-pyrolyzed (700oC) and subjected to plasma to introduce hydroxyl functional groups on the surface, making it hydrophilic. Aqueous dispersions of exfoliated MXene were drop-cast onto the treated SiOC substrates, facilitating weak interfacial bonding via hydrogen interactions. The coated composites were subsequently vacuum-dried. To monitor thermal stability and structural evolution, the MXene/SiOC interface was observed under in-situ HRTEM during pulse heating from room temperature to 1200 °C. The study aims to elucidate the temperature-dependent morphological transformation of MXene layers in relation to the underlying SiOC matrix, offering insights into interface behavior critical for high-temperature multifunctional applications. |