A multiscale study of film thickness dependent femtosecond laser spallation and ablation

Ji，Pengfei1,2,3; Zhang，Yuwen2; Rong，Yiming1; Tang，Yong3

2018

2377-424X

International Heat Transfer Conference

2018-August

7117-7124

A multiscale studying integrating ab initio quantum mechanics, classical molecular dynamics and two-temperature model, is carried out to study film thickness dependent femtosecond laser spallation and ablation. As an interval of 130.73 , five silver films with increasing thickness from 392.19 to 915. 11 are simulated. Absorbed laser fluences of 0.1 / and 0.3 / are chosen to observe the laser spallation and ablation. The simulation results show that film thickness has close correlation with the Kelvin degree of heating of the laser irradiated silver films, which further affects femtosecond laser spallation and ablation. Suggestions for precise micromachining are proposed in this paper.

Materials processing Multiscale modeling Numerical simulation Thermophysics and thermophysical properties

第一

英语

2-s2.0-85068319822

Scopus

1.Southern University of Science and Technology, ,Shenzhen,518055,China
2.University of Missouri, ,Columbia,65211,United States
3.South China University of Technology, ,Guangzhou,510640,China

Ji，Pengfei,Zhang，Yuwen,Rong，Yiming,et al. A multiscale study of film thickness dependent femtosecond laser spallation and ablation[C],2018:7117-7124.