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Wettability and friction control of a stainless steel surface by combining nanosecond laser texturing and adsorption of superhydrophobic nanosilica particles
Conradi, Marjetka (Avtor), Drnovšek, Aljaž (Avtor), Gregorčič, Peter (Avtor)

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Izvleček
In this work, we present functionalization of AISI 316 L surfaces by nanosecond Nd:YAG laser texturing and adsorption of superhydrophobic fluoroalkylsilane functionalized 30-nm silica nanoparticles. Surface modification by varying the distance between laser-produced micro([micro])-channels leads to different surface roughnesses. After nanosilica coating, the superhydrophilic laser-textured surfaces change into superhydrophobic surfaces with the same [micro] -roughness. A higher [micro] -channel density leads to more hydrophobic surfaces after coating. This enables a study of the combined effect of surface wettability and morphology on the friction coefficient and wear resistance. Experiments were performed in dry and water environments. In the case of dry friction, increased [micro]-roughness leads to a higher friction coefficient, and the water-repellency modification by nanosilica particles has no influence on the tribological behaviour. In contrast, in the water environment, the wettability presents an important contribution to the properties of contact surfaces: hydrophobic surfaces exhibit a lower friction coefficient, especially at higher densities of [micro] -channels. Energy-dispersive X-ray spectroscopy analysis of surfaces before and after the tribological experiments is performed, revealing the difference in weight % of Si in the worn surface compared to the unworn surface, which varies according to the nature of the surface morphology due to laser texturing in both dry and water environments.

Jezik:Angleški jezik
Ključne besede:surface engineering, wettability, tribology
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2018
Št. strani:9 f.
Številčenje:Vol. 8
UDK:620.178:535(045)
ISSN pri članku:2045-2322
DOI::10.1038/s41598-018-25850-6 Povezava se odpre v novem oknu
COBISS.SI-ID:16039707 Povezava se odpre v novem oknu
Število ogledov:764
Število prenosov:584
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Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0132
Naslov:Fizika in kemija površin kovinskih materialov

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0392
Naslov:Optodinamika

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:J2-7196
Naslov:Antibakterijske nanostrukturirane zaščitne plasti za biološke aplikacije

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:inženiring površin, omočljivost, tribologija

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