About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2D Materials – Preparation, Properties, Modeling & Applications
|
| Presentation Title |
Experimental and thermodynamic analysis of CVD-based MXene synthesis |
| Author(s) |
Sajjad Hasan, Eric J. Payton, Phillisity Neal, Nishat Sultana |
| On-Site Speaker (Planned) |
Eric J. Payton |
| Abstract Scope |
Development of new applications and types of MXenes has often overshadowed efforts to explore alternative synthesis techniques beyond the top-down etching method. Chemical vapor deposition (CVD) offers some potential benefits but has to date been demonstrated primarily for Mo2C. In the present work, the stoichiometry of refractory metal carbides was adjusted in CVD method by changing partial pressures of H2 and CH4 with Mo, Nb and V substrates and a liquid Cu catalyst. Formation and stability of the materials was analyzed using thermodynamic modeling. Successful formation of M(Mo,Nb,V)_{x}X_{x-1} stoichiometries was confirmed by Rietveld refinement of X-ray diffraction data. Raman and Energy dispersive spectroscopy characterization supported X-ray diffraction analyses. It is found that thermodynamic predictions based on density functional theory can provide guidance for designing CVD processes for M_{x}C_{x-1} stoichiometries but that experimental phase diagram assessment is needed for further advancement of CVD as a viable method for producing MXene precursors. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Process Technology, Computational Materials Science & Engineering |