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Microstructures formation on titanium plate by femtosecond laser ablation

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, , Citation M Tsukamoto et al 2007 J. Phys.: Conf. Ser. 59 666 DOI 10.1088/1742-6596/59/1/140

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1 Joining and Welding Research Institute, Osaka University, Ibaraki, Osaka 567-0047, Japan

2 Graduate School of Engineering, Osaka University, Yamadaoka, Suita, Osaka 565-0871, Japan

3 School of Science and Engineering, Kinki University, Higashi-Osaka, Osaka 577-8502, Japan

4 Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan

5 Cooperative Research Center, Miyazaki University, Gakuen Kibanadai Nishi, Miyazaki 889-2192, Japan

6 Institute for laser technology, Suita, Osaka 565-0871, Japan

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1742-6596/59/1/666

Abstract

Microstructure formation of cone-like protrusions (CLP) on titanium (Ti) plate by the femtosecond laser ablation is reported. The number of the laser pulses to irradiate the Ti plate was varied from 10 to 230 at average laser fluence of 0.75 J/cm2 per pulse on the plate. The onset of CLP creation was observed with exposure of 70 pulses, and yielding CLP with a height from the bottom of the irradiation area of about 9 m after 230 pulses. The formation process of the CLP was found to depend on the laser produced periodic microstructures oriented parallel to the direction of the laser polarization vector.

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10.1088/1742-6596/59/1/140