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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

NUMERICAL INVESTIGATION OF EXCIMER LASER ABLATION OF NICKEL AND COMPARISON WITH EXPERIMENTAL STUDY

Get access (open in a dialog) DOI: 10.1615/IHTC11.20
pages 9-14

Abstract

his work develops a numerical model to compute the transient temperature and phase change induced by pulsed laser irradiation. The enthalpy-based model tracks both the solid/liquid and liquid/vapor interfaces. The interfacial kinetics relating the interface temperature and velocity is incorporated into the model. Calculations show that, for nickel, the maximum surface temperature reaches 0.8 Tc at a laser fluence of 5.2 J/cm2, and 0.9 Tc at a laser fluence of 5.9 J/ cm2. These results agree with previous experimental work on the mechanism of materials removal due to excimer laser irradiation, which showed a transition from surface evaporation to explosive vaporization at a laser fluence of 5.2 J/ cm2. Numerical sensitivity studies are carried out to estimate the effect of uncertain thermophysical properties and interfacial relations on the calculation results.