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  • Controlling the stainless steel surface wettability by nanosecond direct laser texturing at high fluences
    Gregorčič, Peter, fizik ; Šetina, Barbara ; Hočevar, Matej, 1982-
    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.
    Vir: Applied physics. A, Materials science & processing. - ISSN 0947-8396 (Vol. 123, Nov. 2017, str. 1-8)
    Vrsta gradiva - članek, sestavni del
    Leto - 2017
    Jezik - angleški
    COBISS.SI-ID - 15750427

    Povezava(-e):

    https://link.springer.com/content/pdf/10.1007%2Fs00339-017-1392-5.pdf
    Repozitorij Univerze v Ljubljani – RUL
    DOI

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