Formation of cavitation-induced pits on target surface in liquid-phase laser ablation

被引：22

作者：

Takada, N. ^{[1
]}

Nakano, T. ^{[1
]}

Sasaki, K. ^{[2
]}

机构：

[1] Nagoya Univ, Dept Elect Engn & Comp Sci, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Hokkaido Univ, Div Quantum Sci & Engn, Sapporo, Hokkaido 0608628, Japan

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2010年 / 101卷 / 02期

关键词：

CONFINED GEOMETRY; BUBBLE COLLAPSE; NITROGEN; IRRADIATION; GENERATION; EMISSION; BOUNDARY; DYNAMICS; WATER;

D O I：

10.1007/s00339-010-5812-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is well known that a crater is formed on the target surface by the irradiation of intense laser pulses in laser ablation. In this work, we report that additional pits are formed on the bottom surface of the ablation crater due to the collapse of a cavitation bubble in liquid-phase laser ablation. We observed the formation of several cavitation-induced pits when the fluence of the laser pulse used for ablation was approximately 5 J/cm(2). The number of cavitation-induced pits decreased with the laser fluence, and we observed one or two cavitation-induced pits when the laser fluence was higher than 10 J/cm(2). In addition, we examined the influence of the liquid temperature on the formation of cavitation-induced pits. The collapse of the cavitation bubble was not observed when the liquid temperature was close to the boiling temperature, and in this case, we found no cavitation-induced pits on the bottom surface of the ablation crater. This experimental result was discussed by considering the cavitation parameter.

引用

页码：255 / 258

页数：4

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