| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPU-7: Investigation of Sintering Conditions for Optimization of High Entropy Garnet Ceramics |
| Author(s) |
Marlena Alexander, Kaden Anderson, Chuck Melcher, Luis Stand, Mariya Zhuravleva |
| On-Site Speaker (Planned) |
Marlena Alexander |
| Abstract Scope |
Transparent polycrystalline ceramics have been developed for scintillation applications in high-energy X-ray radiography. High-entropy garnet ceramics have shown significant promise in these applications. In this work, high-entropy refers to mixing multiple cations in near-equimolar ratios on a single crystallographic site. The synthesis of these ceramics must be scaled to larger volumes and optimized. This study used a low-cost precursor powder to synthesize 25.4mm-diameter, 4.5mm-thick (Y,Gd,Tb,Lu)3Al5O12:Ce 2% ceramics via uniaxial hot pressing, and varied sintering temperatures during hot-pressing across three temperature ranges: 1400°C, 1500°C, and 1600°C. After pressing we see that the ceramics pressed at 1400°C are the most transparent due to lower carbon diffusion into the ceramic. Archimedes density measurements showed relative densities >99.5% theoretical density. The powder and ceramics are characterized via XRD and SEM to investigate formed phase and microstructure. Scintillation properties of light yield and afterglow are also reported. |
| Proceedings Inclusion? |
Undecided |