|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Beyond the Beam III
||Influence of Hydrogen Content and Particle Size Distribution on the Microstructure of Tantalum Cold Spray Coatings
||Kliah Soto Leytan, Mahsa Amiri, Lorenzo Valdevit, Daniel R. Mumm
|On-Site Speaker (Planned)
||Kliah Soto Leytan
The effects of two distinct tantalum feedstock powder properties on the microstructure of the resulting cold spray coating were investigated through high resolution characterization. Hydrogen content and particle size distribution (PSD) of feedstock powders both play a role in the extent of deformation and bonding between particles that takes place during the cold spray process. Hydrogen is introduced as impurities during processing of powders and/or long-term storage and it has been shown to negatively impact the mechanical properties of bulk tantalum, while the overall shape of the PSD (specifically the end tail) is thought to affect the quality of bonding between particles (especially larger, slower ones). In this work, we systematically and independently varied both the hydrogen content and the PSD of the feedstock powders and investigated the resulting cold spray coatings through SEM and HRTEM to identify potential differences in extent of deformation, bonding, and porosity, among others.