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Nanosecond laser ablation of a metallic glass in water: a high time-resolved imaging study
Philosophical Magazine ( IF 1.6 ) Pub Date : 2020-07-20 , DOI: 10.1080/14786435.2020.1791369
X. Song 1, 2 , X. Q. Wu 2, 3 , K. L. Xiao 2, 3 , C. Li 1, 2 , H. Y. Wang 1, 2 , M. Q. Jiang 1, 2
Affiliation  

ABSTRACT We use a state-of-the-art, ultrafast camera to probe the nanosecond pulse laser ablation of a metallic glass target in water. The laser-induced plasma of metallic glass is captured for the first time. We further observe a series of shock waves in water and the cavitation bubble on the target surface. The shock waves inherit the rapid expansion of the plasma, satisfying the momentum conservation. But the cavitation bubble stems from the nucleation of the surrounding water due to the heating of the plasma. We find that the bubble growth deviates from the Rayleigh-Plesset theory. The primary reason for this deviation is the effect of ablation products due to the temporal overlap between the explosive boiling and the bubble dynamics. Our findings provide a fundamental understanding of underwater laser ablation of metallic glasses, which is an important step to forward such ablation-related applications.

中文翻译:

水中金属玻璃的纳秒激光烧蚀:高时间分辨成像研究

摘要我们使用最先进的超快相机来探测水中金属玻璃目标的纳秒脉冲激光烧蚀。金属玻璃的激光诱导等离子体首次被捕获。我们进一步观察了水中的一系列冲击波和目标表面的空化气泡。激波继承了等离子体的快速膨胀,满足动量守恒。但是空化气泡源于周围水由于等离子体加热而成核。我们发现泡沫增长偏离了 Rayleigh-Plesset 理论。这种偏差的主要原因是由于爆炸沸腾和气泡动力学之间的时间重叠引起的烧蚀产物的影响。我们的发现提供了对金属玻璃水下激光烧蚀的基本理解,
更新日期:2020-07-20
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