Peter Gregorčič (Author), Barbara Šetina (Author), Matej Hočevar (Author)

Abstract

This work investigates the influence of the direct laser texturing at high fluences (DLT-HF) on surface mor - phology, chemistry, and wettability. We use a Nd:YAG laser (gamma= 1064 nm) with pulse duration of 95 ns to process stain- less steel surface. The surface morphology and chemistry after the texturing is examined by using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and electron backscatter diffraction (EBSD), while the surface wettability is evaluated by measuring the static contact angle. Immediately after the texturing, the surface is superhydrophilic in a saturated Wenzel regime. However, this state is not stable and the superhydrophilic-to-superhy - drophobic transition happens if the sample is kept in atmos- pheric air for 30 days. After this period, the laser-textured stainless steel surface expresses lotus-leaf-like behavior. By using a high-speed camera at 10,000 fps, we measured that the water droplet completely rebound from this superhydro- phobic surface after the contact time of 12 ms.

Keywords

surface engineering;laser microstructuring;surface functionalization;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 535(045)
COBISS: 15750427 Link will open in a new window
ISSN: 0947-8396
Views: 2321
Downloads: 518
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Other data

Secondary language: Slovenian
Secondary keywords: inženiring površin;lasersko mikrostrukturiranje;funkcionalizacija površin;
Type (COBISS): Not categorized
Embargo end date (OpenAIRE): 2018-11-13
Pages: str. 1-8
Issue: ǂVol. ǂ123
Chronology: Nov. 2017
DOI: 10.1007/s00339-017-1392-5
ID: 10914917
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