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Influence of laser geometric morphology type on SiC surface wettability

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Abstract

To obtain effective surface morphology to control surface wettability, this work investigated the influence of protuberant and concave morphology, which are respectively represented by circle-dimpled and micro-square-convex morphology, on surface wettability. The geometric morphologies were processed on silicon carbide (SiC) surfaces by a laser-marking machine, and surface wettability was monitored by the measurement of contact angles using the sessile drop method. Correlation analysis between contact angles and morphology parameters was conducted to determine the extent of influence. The results showed that the circle-dimpled diameter had a significant influence on surface wettability, whereas grooved width did not. Additionally, the depth of dimples and grooves exerted less influence on controlling wetting behaviors. In addition, surface wettability transformed from a superhydrophilic state to a hydrophobic state on micro-square-convex surfaces; contact angles on circle- dimpled surfaces showed a relatively slow transformation, though the surface wettability also underwent the state change.

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Authors and Affiliations

  1. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China

    Rong Wang & ShaoXian Bai

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  1. Rong Wang
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  2. ShaoXian Bai
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Correspondence to ShaoXian Bai.

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Wang, R., Bai, S. Influence of laser geometric morphology type on SiC surface wettability. Sci. China Technol. Sci. 59, 592–596 (2016). https://doi.org/10.1007/s11431-015-5904-2

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  • DOI: https://doi.org/10.1007/s11431-015-5904-2

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