Visualization of particle trajectories in the laser shock cleaning process |
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Authors: | Deoksuk Jang Jeongwook Lee Jong-Myoung Lee Dongsik Kim |
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Institution: | (1) Department of Mechanical Engineering, POSTECH, Pohang, 790-784, Korea;(2) Laser Engineering Group, IMT Co. Ltd., Uiwang, 449-860, Korea |
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Abstract: | The laser shock cleaning (LSC) method has recently attracted substantial attention since it can remove micro/nano-scale contaminant
particles from a solid surface without direct exposure of the surface to laser irradiation. However, despite the importance
of the particle detachment and redeposition mechanisms in the LSC process, the behavior of the particles during the cleaning
process has never been analyzed experimentally. In this work, the motion of the micrometer-scale particles detached by a laser-induced
plasma/shock wave is visualized by a photoluminescence imaging technique. The technique yields time-resolved particle trajectories
under typical conditions of the LSC process, with and without a gas jet blowing. Discussions are made on the behavior of the
detached particles and redeposition mechanisms. |
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Keywords: | PACS" target="_blank">PACS 81 65 Cf 42 62 Cf 47 40 Nm |
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