1. Self-Organized Micro-Columns and Nano-Spheres Generated by Pulsed Laser Ablation of Ti/Al Alloy in Water.
- Author
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Qing-Qiang, Cui, Xiang-Dong, Liu, Ming, Chen, Ming-Wen, Zhao, Chun-Sheng, Wang, and Shuang, Li
- Subjects
PULSED laser deposition ,LASER deposition ,PLASMA spectroscopy ,OPTICAL spectroscopy ,PLASMA physics ,SPECTRUM analysis - Abstract
Dense arrays of micro-columns are formed on the surface of Ti-Al alloy by cumulative nanosecond pulsed laser ablation in water. The fabric-like structure characterized by Ti-Al nano-spheres absorbed on micro-cluster 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. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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