| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Ceramic Materials and Processing
|
| Presentation Title |
Stability and Properties of MAX Phases with Compositionally Complex M-layers |
| Author(s) |
Milos Dujovic, Miladin Radovic, Ankit Srivastava, Zeyi Tan |
| On-Site Speaker (Planned) |
Milos Dujovic |
| Abstract Scope |
This work focuses on MAX phase ternary carbides with chemical formula M2AlC where M is either Cr, Ti, Ta, V, Nb or a combination of them. Specifically, we focus on synthesizing M2AlC phases with two to five elements on M-site in equiatomic ratios starting from single M-element M2AlC. This approach for synthesizing MAX phases with compositionally complex M-layers is selected to avoid the formation of intermediate phases in final microstructure due to possible incomplete reaction of elemental powders. While equiatomic M-element ratios are considered to (theoretically) maximize configurational entropy and, hence their stability. Our results show that out of 26 compositionally complex M2AlC examined in this study, only a few are found to be phase pure, while only one of them with four elements in the M-layers is entropy stabilized. Furthermore, the mechanical testing of these compositionally complex M2AlC suggests that the solid solution strengthening effect is not always dominant. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Other, Powder Materials |