Experimental Study on Super-Hydrophobic Copper Surface Fabricated by HS-WEDM

Wan, Yan Ling; Lian, Zhong Xu; Yu, Hua Dong; Xu, Jinkai

doi:10.4028/www.scientific.net/amm.687-691.4367

Cited by 9 publications

(5 citation statements)

References 8 publications

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“…High-speed wire cut EDM has been used by many researchers to generate hydrophobic and superhydrophobic surfaces on various metals, such as aluminium and aluminium alloys, copper, and so on. [53][54][55] Investigations have also been done to understand the role of machining and processing parameters like pulse width, pulse gap/interval and power tube. Wan et al have found that these influence the contact angles on the resulting surfaces.…”

Section: Multistep Processesmentioning

confidence: 99%

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Superhydrophobic surfaces review: Functional application, fabrication techniques and limitations

Manoharan

Bhattacharya

2019

Journal of Micromanufacturing

139

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Over the years, researchers have been working to mimic the nature by inducing superhydrophobic properties into a variety of material surfaces so that they exhibit non-wetting properties. Many diverse applications have been found in the fields, such as space and aerospace, defence, automotive, biomedical applications and engineering, sensors, apparels, and so on. Superhydrophobic surfaces repel water generally due to their surface texture or chemical properties. In this article, we focus on the functional applications of the superhydrophobic surfaces, and state-of-the-art fabrication technologies and processes, and the limitations of these processes to generate the superhydrophobic surfaces have been developed over the years.

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Section: Multistep Processesmentioning

confidence: 99%

“…Wan et al have found that these influence the contact angles on the resulting surfaces. 53, 56 Figure 21 shows an Al-alloy surface generated using WEDM by Bae et al which shows superhydrophobic properties.…”

Section: Theory Of Superhydrophobic Surfacesmentioning

confidence: 99%

Superhydrophobic surfaces review: Functional application, fabrication techniques and limitations

Manoharan

Bhattacharya

2019

Journal of Micromanufacturing

139

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“…The machining parameters of the process control the derived microroughness, which in turn controls the wetting behavior of the surface. On a copper surface produced with WEDM and chemical surface modification for the enhancement of hydrophobicity, the increase in the pulse width and peak current led to a gradual decrease in the contact angle (CA) of specimens, while no correlation was found with the change in the pulse interval [40]. The current increase during the sink EDM of copper surfaces was reported to increase the CA, while surface roughness values (Ra and Rz) were found to increase and then decrease at higher currents (12 A) [36].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Machining Parameters and Surface Roughness on the Wettability of the Al6082 Surfaces Produced with WEDM

Skondras-Giousios,

Karmiris-Obratański,

Jarosz

et al. 2024

Materials

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Electrical Discharge Machining (EDM) is a non-conventional machining technique, capable of processing any kind of conductive material. Recently, it has been successfully utilized for producing hydrophobic characteristics in inherently hydrophilic metallic materials. In this work, Wire Electrical Discharge Machining (WEDM) was utilized for producing hydrophobic characteristics on the surface of the aluminum alloy 6082, and various parameters that can affect wettability were investigated. Adopting an orthogonal Taguchi approach, the effects of the process parameter values of peak current, pulse-on time, and gap voltage on the contact angles of the machined surfaces were investigated. After machining, all samples were observed to have obtained hydrophobic properties, reaching contact angles up to 132°. The peak current was identified as the most influential parameter regarding the contact angle, while the gap voltage was the less influential parameter. A contact angle variation of 30° was observed throughout different combinations of machining parameters. Each combination of the machining parameters resulted in a distinct surface morphology. The samples with moderate roughness values (3.4 μm > Sa > 5.7 μm) were found to be more hydrophobic than the samples with high or low values, where the contact angle was measured under 115°. In addition, the finite element modeling of the experimental setup, with parametric surfaces of uniform random and Perlin noise types of roughness, was implemented. Time dependent simulations coupling phase field and laminar flow for the modelingof the wetting of surfaces with different surface roughness characteristics showed that an increase in the Sa roughness and total wetted area can lead to an increase in the contact angle. The combination of experimental and computational results suggests that the complexity of the wettability outcomes of aluminum alloy surfaces processed with WEDM lies in the interplay between variations of the surface chemical composition, roughness, micro/nano morphology, and the surface capability of forming a composite air/water interface.

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“…At present, few studies are available on preparing multi-scale microporous and hydrophobic surfaces on a metal substrate through EDM. Researchers have found that a surface has good hydrophobic properties when its structural characteristics are composed of craters, bulges, micropores, and particles [13,14]. A new process of preparing hydrophobic surfaces with micropores through EDM is proposed in the present study on the basis of previous studies that have shown that the surface of Ni-Ti alloy machined through EDM is mostly composed of craters and bulges [15].…”

Section: Introductionmentioning

confidence: 99%

Surface Characteristics and Hydrophobicity of Ni-Ti Alloy through Magnetic Mixed Electrical Discharge Machining

Feng

Zhang

et al. 2019

Materials

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Nickel–titanium (Ni-Ti) alloy has been selected as stent material given its good biocompatibility. In this study, experimental research on this material was conducted using magnetic field-assisted electrical discharge machining (EDM). The surface topography of the machined workpiece was analyzed with a scanning electron microscope (SEM). Hydrophobicity was measured by using an optical contact angle measuring instrument. The roughness values of different positions on the surface were measured using a TR200 roughness instrument. Results showed that the composite structure of solidification bulge–crater–pore–particle can be prepared on the surface of the Ni-Ti alloy through magnetic mixed EDM using suitable processing parameters. Moreover, the contact angle of the surface reaches 138.2°.

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Experimental Study on Super-Hydrophobic Copper Surface Fabricated by HS-WEDM

Cited by 9 publications

References 8 publications

Superhydrophobic surfaces review: Functional application, fabrication techniques and limitations

Superhydrophobic surfaces review: Functional application, fabrication techniques and limitations

Investigation of the Influence of Machining Parameters and Surface Roughness on the Wettability of the Al6082 Surfaces Produced with WEDM

Surface Characteristics and Hydrophobicity of Ni-Ti Alloy through Magnetic Mixed Electrical Discharge Machining

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