期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 252, 期 -, 页码 313-321出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2017.09.039
关键词
Picosecond DLIP; Hierarchical micro-structures; LIPSS; High aspect ratio; Hydrophobicity
资金
- European Union's Horizon research and innovation programme under the Marie Sklodowska-Curie grant [675063]
- German Research Foundation (DFG)
We have studied the fabrication of line-like and pillar-like periodic microstructures on stainless steel by means of direct laser interference patterning. A picosecond (10 ps) pulsed Nd:YAG laser operating at 1064 nm wavelength was used to produce the microstructures with spatial periods ranging from 2.6 mu m to 5.2 mu m. By varying the laser parameters (laser fluence, pulse-to-pulse overlap) structure depths ranging from 500 nm to nearly 11.5 mu m could be obtained. Furthermore, low and high frequency laser induced periodic surface structures (LIPSS) have been generated, resulting in three-level multi-scaled patterns. The orientation of the laser induced periodic structures with respect to the interference patterns could be adjusted by controlling the laser beam polarization. Finally, static water contact angle measurements are performed to investigate its correlation with the surface morphology. The treated surfaces are characterized using confocal and scanning electron microscopy.
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