|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
||Accelerated Powder Consolidation in Nanocrystalline Materials Competes with Organic Burn-off
||Yannick Naunheim, Christopher A. Schuh
|On-Site Speaker (Planned)
The thermal debinding of organic additives typically occurs at the lower end of the temperature cycle as compared with the consolidation of powder in many additive manufacturing operations, due to the different process kinetics. In this talk, we examine cases of powder consolidation where the volatilization of the processing aids is kinetically challenged by the low-temperature onset of densification. The systems are based on Ni and are nanocrystalline, and therefore exhibit accelerated diffusional kinetics. We also consider cases that include a phase separation step that is intentionally designed to accelerate sintering. In such systems, the onset temperature for densification is so aggressively lowered that it competes kinetically with the organic debinding, which can lead to porosity by trapped fugitive species, creating new challenges to the acceleration of sintering.
||Additive Manufacturing, Powder Materials, Process Technology