| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
2024 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-74: Probing Structural and Compositional Heterogeneity in High Entropy Carbides: Impact of Cr Addition and Mechanical Stress |
| Author(s) |
Caleb Schenck, Josephine Hartmann, Elizabeth Kautz, Farhan Ishrak, Michael Lastovich, William G. Fahrenholtz, Donald W. Brenner, Bharat Gwalani |
| On-Site Speaker (Planned) |
Caleb Schenck |
| Abstract Scope |
High entropy carbides (HECs) are a relatively new class of materials, seeing significant research interest in the past 5-6 years, known for their outstanding hardness and high temperature strength. The first HECs that were synthesized contained equiatomic proportions of group IV and V transition metals, resulting in single phase MC-type rock salt structured carbides with disordered metal lattice sites. In contrast, the Cr-C system forms Cr carbides that are distinct from those of group IV and V transition metal monocarbides, making this system more responsive to entropy stabilization. Previous studies on Cr-containing HECs revealed Cr enrichment at grain boundaries and increased hardness due to local lattice strain. The present research utilizes various microscopy techniques and atom probe tomography to investigate the local structure and chemistry in HfZrTaTi-based carbides with Cr additions. Nanomechanical testing is employed to characterize the mechanical properties and deformation behavior of these HECs. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, Characterization, Ceramics |