论文摘要
Continuous wave（CW） laser irradiation is employed to enhance the pulsed laser ablation of silicon and stainless steel（316 L）samples. Different surface temperatures generated by the CW laser irradiation are set as the initial working circumstance for the pulsed laser ablation. The diameter and depth of laser-ablated craters are measured to study threshold fluence, pulse incubation coefficient and ablation rate under different surface temperatures. Numerical simulation employing Heat Transfer in Solid and Deformed Geometry Interface modules in COMSOL is performed to estimate ablation rate theoretically based on Hertz-Knudsen equation. The realized crater-related data are analyzed to further obtain their dependences on surface temperature. The parametric and morphological studies indicate that the weakened plasma shielding effect and thermal diffusion in the ablated region induced by the CW laser irradiation lead to the enhanced pulsed laser ablation significantly.
论文目录
文章来源
类型: 期刊论文
作者: Ye Ding,LiJun Yang,MingHui Hong
来源: Science China(Physics,Mechanics & Astronomy) 2019年03期
年度: 2019
分类: 基础科学,信息科技
专业: 物理学,无线电电子学
单位: Key Laboratory of Micro-systems and Micro-structures Manufacturing, Ministry of Education, Harbin Institute of Technology,Department of Electrical and Computer Engineering, National University of Singapore,School of Mechatronics Engineering, Harbin Institute of Technology
基金: supported by the National High-Tech R&D Program of China(Grant No.2015AA042702),the National Key R&D Program of China(Grant No.2017YFB1104900),the Singapore Maritime Institute Research Grant(Grant No.R261502009592),China Scholarship Council
分类号: TN24
页码: 70-78
总页数: 9
文件大小: 791K
下载量: 21
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