About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
Direct-writing SiC with Micro-cold Spray: Particle Agglomeration Dependence on Film Density |
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 |
Micro-cold spray produces thick films by accelerating aerosolized nano- and micro-particles through a nozzle from near atmospheric pressure to medium vacuum (1-3 Torr). By impacting these accelerated particles on a substrate that is translated orthogonal to the aerosol jet, patterned films are deposited. As compared to cold spray which is capable of depositing metallic or metal-matrix composite films, micro-cold spray has demonstrated the unique capability of depositing high quality ceramic films at room temperature. Particle agglomeration occurs ubiquitously for the particles used in micro-cold spray and is believed to significantly affect the density and microstructure of the deposit. We perform molecular dynamics simulations of multi-particle agglomerate impact, varying parameters such as agglomerate size and shape, to determine the effect of agglomeration on film density. These simulation results are compared to experimental results from SiC films with the aim of understanding how agglomerate size and morphology influences deformation and bonding mechanisms. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |