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Meeting Materials Science & Technology 2017
Symposium Non Beam-based Additive Manufacturing Approaches for Metallic Parts
Presentation Title Mechanisms for Deformation and Film Formation from High Speed Aerosol Deposition of Ag
Author(s) Tushar Chitrakar, Jeremiah J McCallister, Michael F Becker, John W Keto, Desiderio Kovar
On-Site Speaker (Planned) Desiderio Kovar
Abstract Scope The Laser Ablation of Microparticle Aerosol (LAMA) process is capable of producing patterned, thick (1-100 Ám) films by converting a microparticle aerosol into nanoparticles that are subsequently accelerated to high velocities (400-1,200 m/sec) and impacted onto substrates. Experiments have been conducted with silver for a range of particle sizes and impaction velocities and the microstructure of the film have been characterized. Molecular dynamics (MD) simulations of the impaction process have been conducted to study the impaction process in greater detail by focusing on the evolution of the particle and substrate immediately following impaction. The simulation results suggest that mechanisms for deformation and film formation vary with particle size, particle impaction velocity, particle orientation, particle misorientation with respect to the substrate, and the presence and location of defects. The final states of the simulations are compared to the experimental results to determine the likely operational mechanisms.
Proceedings Inclusion? Definite: At-meeting proceedings


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