About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Thick Films Using Dry Aerosol Processes: Process Development, Materials, Process Optimization and Applications
|
| Presentation Title |
Helium-Free High-Performance Cold Spray |
| Author(s) |
David Brennan, Kyle Johnson, Aaron Nardi |
| On-Site Speaker (Planned) |
David Brennan |
| Abstract Scope |
Cold spray (CS) is a solid-state deposition method used for coatings, repair, and additive manufacturing. One obstacle to greater utilization of CS is the need of helium to achieve the velocity required to deposit high-performance materials. Helium is expensive, with limited availability while nitrogen will not produce these velocities. In response, VRC Metals Systems (VRC) developed a prototype cold spray system utilizing hydrogen as a carrier gas. Preliminary studies by VRC demonstrated the ability to deposit both metals and polymers using hydrogen. VRC was able to successfully deposit nickel and Inconel 625 for mechanical characterization using hydrogen. Results showed that using hydrogen improved deposition rate and mechanical properties of the deposits in comparison to helium at the same setpoints. This corresponds with calculations illustrating that hydrogen can achieve velocities equal or greater than helium without heat, thus demonstrating the viability of hydrogen for safely producing high quality cold spray deposits. |