| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Ceramic Materials and Processing
|
| Presentation Title |
The fracture behavior and morphology of transition metal carbides. |
| Author(s) |
Christopher R. Weinberger, Sajjad Hossain, Alyssa Stubbers, Gregory Thompson |
| On-Site Speaker (Planned) |
Christopher R. Weinberger |
| Abstract Scope |
Transition metal carbides are ceramics used in a wide range of applications that include cutting tools and aerospace environments. Common to most ceramics, they suffer from low fracture toughness at low temperatures. However, the zeta phase is known to have a toughness approximately 3-5X higher than most ceramics. In this work, we examine the various cleavage energies and their relationship to fracture toughness in the tantalum carbides. Specifically, we model how other low symmetry phases, like Ta2C and the zeta phase, deform at the single crystal level. Using DFT computed cleavage energies, the fracture toughness as a function of crystal orientation is predicted and compared to experimental conditional fracture toughness tests made from micro-cantilever beams that are within individual Ta2C grains that match the various computed orientations. This provides insight into the origins of microstructural toughening in these materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Mechanical Properties, Modeling and Simulation |