| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Powder Processing of Functional and Magnetic Materials
|
| Presentation Title |
Growth Optimization of Single Crystal Fibers of Congruently and Incongruently Melting Garnets via Laser Heated Pedestal Growth Method |
| Author(s) |
Dolendra Karki, Edward Clover Hoffman, Paul R. Ohodnicki |
| On-Site Speaker (Planned) |
Dolendra Karki |
| Abstract Scope |
Laser heated pedestal growth (LHPG) has been proven capable of growing high quality single crystal fibers of refractory oxides such as sapphire and YAG (Yttrium aluminum garnet) for applications spanning from high temperature sensing to lasing, from single crystalline feed-stock materials. Single crystal fibers of magneto-optical magnetic garnets can potentially enable magneto-optical field sensing. However, magnetic garnets such as Yttrium iron garnet (YIG) impose unique challenges for stable, high-quality single crystal growth due to incongruent melting resulting in tendency for compositional segregation within the liquid phase, as per the Y2O3-Fe2O3 phase diagram. Here we discuss growth process optimization of YAG (congruent melting) and YIG (incongruent melting) fibers via LHPG method from polycrystalline source materials prepared from their constituent powders using standard powder processing. The associated challenges inherent to the different thermodynamics involved is discussed. The impact on the quality of the fibers grown are analyzed upon optical and materials characterizations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Powder Materials, Ceramics |