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ホーム アーカイブ Thermal Letter 役員 今後の会合 国際伝熱会議の集会
International Heat Transfer Conference 12
2002, 18-23 August, Grenoble, France

Heat transfer in femtosecond laser ablation of metal

Get access DOI: 10.1615/IHTC12.3970
6 pages

要約

The short time-scales and high intensities obtained during femtosecond laser irradiation of metals require that heat transfer calculations take into account the non-equilibrium that exists between electrons and the lattice during the initial laser heating period. Thus, two temperature fields are necessary to describe the process –the electron and the lattice temperature. In this work, the parabolic two step model is solved numerically to predict heating, melting, and evaporation of metal under femtosecond laser irradiation. Kinetic relations at the phase-change interfaces are included in the model. The numerical results show close agreement with experimental melting threshold fluence data. Further, it is predicted that the solid phase has a large amount of superheating and that a distinct melt phase develops with duration of the order of nanoseconds.
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