| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
Examining the Effect of an Oxide Layer on the Deposition of Tantalum Films via Micro-Cold Spray |
| Author(s) |
Stephen G. Bierschenk, Michael F. Becker, Desiderio Kovar |
| On-Site Speaker (Planned) |
Stephen G. Bierschenk |
| Abstract Scope |
Micro-cold spray, also commonly referred to as the aerosol deposition method, is a process for depositing films of metals and ceramics by impacting solid nanoparticles at high velocity onto a substrate at room temperature and at low pressures. Tantalum films deposited by micro-cold spray are desirable because tantalum can serve as a non-reactive barrier coating. Typically, a native oxide layer is present on tantalum powders. In the deposition of films using traditional cold spray with much larger particles, native oxides must fracture for particle-substrate bonding to occur. The fraction of the particle that is oxidized in micro-cold spray and the strain rates experienced by the particles upon impact are both much larger than in cold spray, suggesting that the role of the oxide on film deposition may be distinct. The effect of this oxide layer on particle deformation and adherence to a substrate is studied using molecular dynamics simulations. |