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TECHNICAL PAPERS: Microscale Heat Transfer

Transport Phenomena and Droplet Formation During Pulsed Laser Interaction With Thin Films

[+] Author and Article Information
D. A. Willis, X. Xu

School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907

J. Heat Transfer 122(4), 763-770 (Apr 19, 2000) (8 pages) doi:10.1115/1.1288931 History: Received August 16, 1999; Revised April 19, 2000
Copyright © 2000 by ASME
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References

Figures

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Laser-induced phase change and Marangoni flow
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Results of experimental parametric study for 0.3 μm chromium film on quartz substrate
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AFM results: (a) 0.9 μJ pulse. Vertical scale is 0.4 μm/div., horizontal scale is 0.86 μm/div. (b) 2.1 μJ pulse. Vertical scale is 0.3 μm/div., horizontal scale is 1.1 μm/div.
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Experimental diagram of stop-action photography
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Transient micrographs of 0.3-μm chromium film irradiated by 2.0-μJ 20-nsec laser pulses. Indicated time is with respect to the beginning of the laser pulse at t=0.
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Transient micrographs of 0.3-μm chromium film irradiated by 2.7-μJ 20-nsec laser pulses. Indicated time is with respect to the beginning of the laser pulse at t=0.
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Transient micrographs of 0.3-μm chromium film irradiated by 3.6-μJ 20-nsec laser pulse. Indicated time is with respect to the beginning of the laser pulse at t=0.
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Calculated transient velocity field of a 0.3-μm chromium film irradiated by a 2.0-μJ, 20-nsec laser pulse
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Transient (a) center node temperature, (b) maximum velocity, and (c) center node recoil pressure of 0.3-μm chromium film irradiated by 2.0 and 2.7-μJ 20-nsec pulses
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Final surface topography of 0.3-μm chromium film irradiated by 2.0 and 2.7-μJ 20-nsec incident laser pulses

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