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Wettability surface and friction characterisation of ZrO2 ceramics by femtosecond laser texturing

Wettability surface and friction characterisation of ZrO2 ceramics by femtosecond laser texturing The purpose of this study is to process the wettability surface of the ZrO2 ceramics to improve their surface friction performance.Design/methodology/approachMicrotexture was processed on the surface of ZrO2 ceramics using a femtosecond laser. The three-dimensional texture morphology, surface contact angle, friction curve and wear morphology were measured by the laser confocal microscope, the contact angle meter, the reciprocating friction and wear tester and the scanning electron microscope, respectively. Based on Wenzel and partial impalement models, a geometric model of micro pits is established to study the influence mechanism of micro pit depth, diameter and distribution density on wettability and to analyze the relationship between surface wettability and tribological properties.FindingsThe results show that changing the geometric characteristics of the texture will lead to a change in the solid-liquid contact mode, and then lead to a change of in the surface contact angle. Wettability is an essential factor that affects the reduction of surface friction. The construction of a reasonable texture can enhance the surface hydrophilicity, which is conducive to the formation of a lubricating film on the ceramic surface, thereby reducing abrasive and adhesive wear, and improving the wear resistance of the ZrO2 ceramic surface.Originality/valueThe results provide a theoretical reference for femtosecond laser surface texture wettability regulation and tribological performance improvement. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Industrial Lubrication and Tribology Emerald Publishing

Wettability surface and friction characterisation of ZrO2 ceramics by femtosecond laser texturing

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Publisher
Emerald Publishing
Copyright
© Emerald Publishing Limited
ISSN
0036-8792
eISSN
0036-8792
DOI
10.1108/ilt-08-2022-0241
Publisher site
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Abstract

The purpose of this study is to process the wettability surface of the ZrO2 ceramics to improve their surface friction performance.Design/methodology/approachMicrotexture was processed on the surface of ZrO2 ceramics using a femtosecond laser. The three-dimensional texture morphology, surface contact angle, friction curve and wear morphology were measured by the laser confocal microscope, the contact angle meter, the reciprocating friction and wear tester and the scanning electron microscope, respectively. Based on Wenzel and partial impalement models, a geometric model of micro pits is established to study the influence mechanism of micro pit depth, diameter and distribution density on wettability and to analyze the relationship between surface wettability and tribological properties.FindingsThe results show that changing the geometric characteristics of the texture will lead to a change in the solid-liquid contact mode, and then lead to a change of in the surface contact angle. Wettability is an essential factor that affects the reduction of surface friction. The construction of a reasonable texture can enhance the surface hydrophilicity, which is conducive to the formation of a lubricating film on the ceramic surface, thereby reducing abrasive and adhesive wear, and improving the wear resistance of the ZrO2 ceramic surface.Originality/valueThe results provide a theoretical reference for femtosecond laser surface texture wettability regulation and tribological performance improvement.

Journal

Industrial Lubrication and Tribology – Emerald Publishing

Published: Jan 2, 2023

Keywords: Femtosecond laser; ZrO2 ceramic; Surface texture; Wettability; Friction property

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