| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
|
| Presentation Title |
Micro-Cold Spray: Effect of Particle Impact Velocity on SiC Film Morphology |
| Author(s) |
Derek W. Davies, Michael G. Gammage, Michael F. Becker, John W. Keto, Desiderio Kovar |
| On-Site Speaker (Planned) |
Derek W. Davies |
| Abstract Scope |
The micro-cold spray (MCS) process produces thick films by accelerating aerosolized nanoparticles through a nozzle from near atmospheric pressure (300-760 Torr) to medium vacuum (approximately 1-3 Torr). By impacting these particles on a substrate translated orthogonal to the aerosol jet, patterned films are deposited. Compared to other particle deposition processes using high velocity impaction such as cold spray, MCS has demonstrated the unique capability of depositing high quality ceramic films at room temperature. Deposition of SiC powder with average particle size of 500 nm is performed using a custom MCS machine equipped with a long converging-diverging tungsten carbide nozzle. Impact velocity of the particles is varied by changing carrier gas type and upstream and downstream pressures. The resulting films are characterized by SEM imaging, EDX analysis, nano-wear testing, and adhesion testing. |