| About this Abstract |
| Meeting |
2019 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2019)
|
| Symposium
|
2019 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2019)
|
| Presentation Title |
Fabrication and Characterization of High-Purity Alumina Ceramics Doped with Zirconia via Laser Direct Deposition |
| Author(s) |
Aditya Thakur, John Pappas, Xiangyang Dong |
| On-Site Speaker (Planned) |
Xiangyang Dong |
| Abstract Scope |
Additive manufacturing of ceramics via laser direct deposition is particularly challenging owing to high thermal gradients and subsequently high tendency for thermally induced cracking. Therefore, it is necessary to have an improved understanding of the effects of processing conditions and material compositions on the quality of deposited ceramic parts. In this paper, thin wall structures of high purity ceramics were fabricated with commercially available alumina powder. The effects of zirconia dopants, varying from 0 wt.% to 10 wt.%, were studied. The microstructure and compositions of the manufactured specimens were characterized using scanning electron microscopy and energy dispersive x-ray spectroscopy. The obtained images were then used to study grain size, orientation, and distribution. Grain size distribution varied within the deposited ceramic parts due to the non-uniform temperature distribution during printing. The zirconia dopant was found to mainly accumulate within grain boundaries. An increasingly finer microstructure was observed with increased zirconia doping materials in the printed samples. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |