| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Ceramic Materials and Processing
|
| Presentation Title |
Optimizing freeze-cast alumina for high-temperature applications |
| Author(s) |
Mert Arslanoglu, Somnath Mandal, Eric Bell, Burak Ozdoganlar, Rahul Panat |
| On-Site Speaker (Planned) |
Rahul Panat |
| Abstract Scope |
Ceramics with adjustable gas permeability are essential for high-temperature applications, such as solid oxide fuel cells, molten metal and glass processing, and thermal barrier coatings. However, creating high-porosity ceramics that are both robust and thermally stable, with controlled pore characteristics, is a challenge. In our study, we explore the potential of freeze-casting as a route to customize gas permeability and thermal properties of alumina. By varying parameters like solid loading and freezing conditions, we produce directional and interconnected micropores that facilitate gas flow while preserving mechanical strength. Solid loading is identified as the key factor influencing final properties, with slow dynamic cooling outperforming rapid or static methods. The freeze-cast alumina, featuring 83% porosity and an average pore diameter of 24 μm, demonstrates a Darcian permeability of 6.82×10⁻¹² m², a compressive strength of 7.14 MPa, a thermal conductivity of 1.51 W m⁻¹K⁻¹, and a linear expansion coefficient of 9.05×10⁻⁶ K⁻¹. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Characterization, Other |