About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
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Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
Presentation Title |
Micro Cold Spray of Partially Sintered Zinc Oxide Nanoparticle Agglomerates |
Author(s) |
Scott Burlison, Michael Becker, Desiderio Kovar |
On-Site Speaker (Planned) |
Scott Burlison |
Abstract Scope |
The micro cold spray (MCS) process utilizes the high velocity impact of ceramic nanoparticles to deposit thick films at room temperature. Although films of many ceramics have been deposited successfully, the mechanisms responsible for adhesion of particles and agglomerates upon impact remain poorly understood. In this study, molecular dynamics (MD) simulations were performed in the LAMMPS software package to study the impact behavior of partially sintered zinc oxide (ZnO) multi-nanoparticle (NP) agglomerates onto a ZnO substrate. Sintering temperature and sintering time were varied to produce agglomerated particles with different agglomerate strengths. Each agglomerate impact was studied post-simulation in OVITO to determine the effect of neck size on agglomerate impact behavior. Furthermore, commercially available ZnO nanopowder was partially sintered and subsequently micro cold sprayed for comparison with the simulation results. |