| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
A Molecular Dynamics Study on the Micro Cold Spray of Zinc Oxide Films |
| Author(s) |
Scott Burlison, Michael F. Becker, Desiderio Kovar |
| On-Site Speaker (Planned) |
Scott Burlison |
| Abstract Scope |
The micro cold spray (MCS) process utilizes high velocity impact of sub-micron ceramic particles to deposit thick films at room temperature. Although films from many ceramics have been successfully deposited, the mechanisms responsible for the sticking of particles upon impact remains poorly understood. In this study, the impact of wurtzite zinc oxide (ZnO) nanoparticles onto a zinc oxide substrate was studied as a function of particle diameter (size range) and particle impact velocity (velocity range) using molecular dynamics (MD) simulations in the LAMMPS software package. Atomic strain, crystal structure, temperature, and potential energy were visualized at selected time steps through the simulation using OVITO to determine their contribution to particle adhesion. Data was compared to ceramics of other bonding types (ionic and covalent) to propose the deformation mechanisms responsible for adhesion and film formation of this mixed ionic-covalent material. |