کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9567116 1503710 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanism of ultrashort laser ablation of metals: molecular dynamics simulation
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Mechanism of ultrashort laser ablation of metals: molecular dynamics simulation
چکیده انگلیسی
A theoretical model is developed and a molecular dynamics simulation technique is applied for the description of ultrashort laser ablation of metals. The ablation of Al, Ni, and Fe using 0.1, 0.5 and 5 ps laser pulses at wavelengths of 248 and 800 nm is studied. The process is investigated at fluences up to 0.5 J/cm2. The analysis based on the temporal evolution of the ablation, the temperature, and the pressure distributions into the material reveals that a thermo-mechanical mechanism (spallation) takes place near the threshold. However, phase explosion is found to be the dominant mechanism of material removal at fluences higher than several hundreds of mJ/cm2. The influence of the laser parameters (wavelength and pulse duration) is obtained and discussed. The ablation depth as a function of the laser fluence and the ablation threshold value are evaluated and compared with the experimental data available. Good agreement between the theory and experiments is observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 247, Issues 1–4, 15 July 2005, Pages 243-248
نویسندگان
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