Metal and polymer melt jet formation by the high-power laser ablation |
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Authors: | Jack J Yoh Ardian B Gojani |
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Institution: | School of Mechanical and Aerospace Engineering, Seoul National University, 599 Kwanak-Ro, Kwanak-Gu, Seoul 151-742, Republic of Korea |
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Abstract: | The laser-induced metal and polymer melt jets are studied experimentally. Two classes of physical phenomena of interest are: first, the process of explosive phase change of laser induced surface ablation and second, the hydrodynamic jetting of liquid melts ejected from a beamed spot. We focus on the dynamic link between these two distinct physical phenomena in a framework of forming and patterning of metallic and polymer jets using a high-power Nd:YAG laser. The microexplosion of ablative spot on a target first forms a pocket of hot liquid melt and then it is followed by a sudden volume change of gas-liquid mixture leading to a pressure-induced spray jet ejection into surrounding medium. |
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Keywords: | 47 55 &minus t 61 25 hk 47 40 Rs 52 38 Mf 79 20 Ds |
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