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Kinetic Evolution of Laser Ablating Alloy Materials

激光器 材料科学 等离子体 激光烧蚀 烧蚀 辐照度 蒸发 光学 惯性约束聚变 合金 动能 冶金 航空航天工程 物理 热力学 工程类 量子力学
作者
Junxiao Wang,Yang Zhao,Lei Zhang,Shuqing Wang,Maogen Su,Duixiong Sun,Qi Min,Weiguang Ma,Wangbao Yin,Suotang Jia
出处
期刊:Frontiers in Physics [Frontiers Media]
卷期号:9 被引量:2
标识
DOI:10.3389/fphy.2021.812283
摘要

Through the theoretical simulation and analysis of the whole process of laser ablating target and producing plasma with high spatio-temporal resolution, it is helpful for people to gain a more complete understanding of the ablation process of target and the evolution process of plasma parameters, which has an important guiding role for the improvement and optimization of laser ablation technology. Alloys are commonly used in daily life, but there are few researches on laser-induced alloy targets at present. Therefore, based on the thermal model of laser ablation and the two-dimensional axisymmetric multi-species hydrodynamic model, the process of laser ablating Al-Mg alloy under atmospheric pressure argon is theoretically simulated, and the ablation process of alloy target and the spatio-temporal evolution results of plasma parameters under different laser irradiances are compared. At high laser irradiance, the melt and evaporation depth, laser energy absorption and plasma characterization parameters are much greater than those at low laser irradiance, and the species energy distribution at different laser irradiance also presents different trends. In addition, the velocity of different species is calculated according to the position-time diagram of the maximum emission intensity, and they expand at a constant speed during the studied time. These results can provide some theoretical guidance for the early application of laser-induced breakdown spectroscopy in metallurgy.
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