Inflight Particle Behavior in the Vacuum Kinetic Spray Process

The vacuum kinetic spray (VKS) process, also-called aerosol deposition, is a promising spray technology by which a thin or thick film can be fabricated at room temperature. Although a number of relevant studies have been performed, almost all have focused on the development of various applications,...

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Bibliographic Details
Published in:Journal of thermal spray technology 2017-10, Vol.26 (7), p.1616-1631
Main Authors: Park, Hyungkwon, Kwon, Hansol, Lee, Changhee
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Machines
Manufacturing
Materials Science
Peer Reviewed
Processes
Surfaces and Interfaces
Thin Films
Tribology
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Summary:The vacuum kinetic spray (VKS) process, also-called aerosol deposition, is a promising spray technology by which a thin or thick film can be fabricated at room temperature. Although a number of relevant studies have been performed, almost all have focused on the development of various applications, and unfortunately, the deposition mechanism has not yet been clarified. In this respect, the particle velocity in the flow field in VKS is investigated as a first stage of research into the VKS deposition mechanism. In this research, after a simulation prototype was derived based on the experimental results, the particle average and impact velocities were estimated. In addition, the change in particle velocities with gas flow rates, particle size, and working distance was analyzed based on simulation analyses and microstructural evidence. As a result, the gas flow rate, particle size, and working distance affect the particle impact velocity and further deposition behavior and film microstructure.
ISSN:1059-9630
1544-1016
DOI:10.1007/s11666-017-0614-x