| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Tailored Morphology of TaC Nanoparticles by Introduction of Transition Metal Dopants |
| Author(s) |
Stephanie Ortega, Jixuan Dong, Jamie Doan, Katada Siraj, Olivia A. Graeve |
| On-Site Speaker (Planned) |
Stephanie Ortega |
| Abstract Scope |
TaC is an ultra-high-temperature ceramic (UHTC) which is known for its high melting temperature (~4100 K) and outstanding hardness (15-19 GPa), making it particularly relevant for engineering applications where environments are harsh. However, the use of TaC is limited because of defects and unwanted phases which form during typical fabrication techniques such as sintering. The unwanted phases and defects in TaC, particularly porosity, have been linked to a decrease in mechanical properties. We hypothesize that faceted morphologies of TaC nanoparticles help in the manufacture of less porous structures after sintering, as well as prevention of creep deformation due to interlocking of faceted grains. In this study, doped TaC nanoparticles with faceted morphologies have been synthesized through a solvothermal method and subsequently spark plasma sintered to obtain samples for characterization of mechanical properties and grain boundary structure. Dopants included iron, cobalt, nickel and titanium. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, High-Temperature Materials, Powder Materials |