About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Development of Powders
|
| Presentation Title |
Atomic Layer Deposition (ALD) for Improved Ti64 Feedstocks for Laser Powder Bed Fusion Processes |
| Author(s) |
Alexandra Koegel, Chris Gump, Brandon Castro, Joshua Campbell, Tommy Martin |
| On-Site Speaker (Planned) |
Alexandra Koegel |
| Abstract Scope |
Forge Nano (FN) has coated Ti64 AM feedstock with Al2O3 using atomic layer deposition (ALD). ALD utilizes sequential, self-limiting surface reactions to deposit continuous, conformal films on surfaces with sub-nanometer thickness control. Previously reported results showed increased flowability of the powder, as well as improved density, yield stress, and ultimate tensile strength in the as-built and HIP’d parts. In this work, the coating process was scaled from 200 g to 100 kg of Ti64. Thermogravimetric analysis showed that the film imparted increased oxidation resistance, with the oxidation onset temperature increasing from about 300°C to about 550°C. Flammability and explosivity testing results will be shared along with how they affect shelf-life and powder processing via LPBF, binder jet, and other AM processes in non-inert environments. Further scaling to tons-scale batches and continuous production processes will be discussed. |