Self-Organized Micro-Columns and Nano-Spheres Generated by Pulsed Laser Ablation of Ti/A1 Alloy in Water

Dense arrays of micro-columns are formed on the surface of Ti-AI alloy by cumulative nanosecond pulsed laser ablation in water. The fabric-like structure characterized by Ti-A1 nano-spheres absorbed on micro-duster in liquid is most likely responsible for the occurrence of laser micro-etching and lo...

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Published in中国物理快报：英文版 no. 1; pp. 115 - 118
Main Author 崔清强 刘向东 陈明 赵明文 王春省 李爽
Format Journal Article
LanguageEnglish
Published 2014
Subjects
Ti-Al合金
微柱
水
等离子体光谱
纳米球
脉冲激光烧蚀
自组织
金属表面
Online AccessGet full text
ISSN0256-307X
1741-3540

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Summary:Dense arrays of micro-columns are formed on the surface of Ti-AI alloy by cumulative nanosecond pulsed laser ablation in water. The fabric-like structure characterized by Ti-A1 nano-spheres absorbed on micro-duster in liquid is most likely responsible for the occurrence of laser micro-etching and localized melting, resulting in continuous deepening of micro-holes and the formation of micro-columns. Laser induced plasma spectroscopy is carried out to reveal the effect of micro-columns on subsequent pulse laser ablation. The intensity of spectral lines from Ti ions by additional laser ablation of the modified spot is higher than that created over a smooth surface. These results suggest that the micro-columns lead to an enhanced absorption of the following laser energy. The proposed results and relevant discussions are of importance for the development of light-trapping coatings on a metal surface.
Bibliography:CUI Qing-Qiang, LIU Xiang-Dong, CHEN Ming, ZHAO Ming-Wen, WANG Chun-Sheng, LI Shuang（1School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 2School of Chemistry, Shandong University, Jinan 250100 3School of Computer, Shandong Xiehe University, Jinan 250100）
Dense arrays of micro-columns are formed on the surface of Ti-AI alloy by cumulative nanosecond pulsed laser ablation in water. The fabric-like structure characterized by Ti-A1 nano-spheres absorbed on micro-duster in liquid is most likely responsible for the occurrence of laser micro-etching and localized melting, resulting in continuous deepening of micro-holes and the formation of micro-columns. Laser induced plasma spectroscopy is carried out to reveal the effect of micro-columns on subsequent pulse laser ablation. The intensity of spectral lines from Ti ions by additional laser ablation of the modified spot is higher than that created over a smooth surface. These results suggest that the micro-columns lead to an enhanced absorption of the following laser energy. The proposed results and relevant discussions are of importance for the development of light-trapping coatings on a metal surface.
11-1959/O4
ISSN:0256-307X
1741-3540