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...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.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 11105085, 11375108 and 11075097, the Excellent Youth and Middle Age Scientists Fund of Shandong Province under Grant No BS2012CL024, and the Project of Shandong Province Higher Educational Science and Technology Program under Grant No J12LA51.
文摘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.
基金supported by the Chinese Academy of Sciences Large Apparatus United Fund(U1832187)the National Natural Science Foundation of China(21471091)+3 种基金the Natural Science Foundation of Shandong Province(ZR2019MEM030)Guangdong Province Science and Technology Plan Project for Public Welfare Fund and Ability Construction Project(2017A010104003)the Fundamental Research Funds of Shandong University(2018JC022)Taishan Scholar Project of Shandong Province(ts201511004)
