Surface modification and functionalization by electrical discharge coating: a comprehensive review

Liew, Pay Jun; Yap, Ching Yee; Wang, Jingsi; Zhou, Tianfeng; Yan, Jiwang

doi:10.1088/2631-7990/ab7332

Cited by 62 publications

(32 citation statements)

References 150 publications

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“…Modified layer after alloying having over lapped layer with alloying elements in carbon contains minimal thermal distortion that reduces crack propagation, porosity and decarburizing depth based on process parameters and thermal stability of powders that avoids direct contact and expands plasma channel grades in overlapping of surfaces. 17 Nickel as alloying element having conductivity of 1.43 × 10 7 (S/m) and resistivity of about 5.90 ×10 −8 (Ω•m) dispersed in the dielectric limits crack propagation and amalgamated of non-solidified/deposited carbon boundary with other elements on the surface are detailed in Figure 2(a). The mechanism of deposition through electric discharge process while adding nickel as element deposition rate increases by voltage reduction and duty factors decides surface roughness to facilitate amplifying amalgamated alloying elements.…”

Section: Resultsmentioning

confidence: 99%

A comparison on microstructure and mechanical properties of electric discharge metal matrix nickel and silica composite coating on duplex stainless steel

Arun¹,

Yuvaraj²,

Madhu³

et al. 2020

Journal of Composite Materials

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Electric Discharge Alloying/Coating a thermal process of elemental deposition together with pyrolysis carbon enhance various properties. Nickel and silica both provide excellent property, but the solidification rate differs the material microstructural properties (amorphous) that improves its properties under diverse working conditions. In present study analysis of properties such as surface roughness, Microstructure, layer thickness, elemental composition, porosity, decarburizing depth is detailed through metallurgical characterizations and mechanical testing are compared to nickel and silica. Nickel holds a hardness value of 1272 HV and across 968 HV with minimal in carter, pokes, splatters having uniform boundaries that improves friction co-efficient, limiting wear resistant, phase transformation, oxidation, and graphite flakes confirm self-lubrication properties at room temperature under higher loading condition. Silica having 1284 HV on the surface and across it reaches to 980 HV due to dispersed elements and its phase transformation of silica to silica carbide directs secondary arching improves bonding by restrictive carbon deposition promotes passage to speak. This limits the porosity, coating layer thickness and increases metal matrix composition in decarburizing layer holds stability towards coating. Nickel affords surface properties limiting matrix composite, oxidation, and grain growth where else silica provides exceptional in metallurgical mixed composition improves the mechanical behaviour of coating.

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Section: Resultsmentioning

confidence: 99%

A comparison on microstructure and mechanical properties of electric discharge metal matrix nickel and silica composite coating on duplex stainless steel

Arun¹,

Yuvaraj²,

Madhu³

et al. 2020

Journal of Composite Materials

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“…EDC can also be achieved by mixing suitable powder in the di-electric fluid [10]. When spark is created between the tool and work-piece, reaction occurs amidst powder and carbon obtained due to decomposition of di-electric.…”

Section: Powder-mixing Methodsmentioning

confidence: 99%

“…The electrical discharge coating is used for producing hard and wear resistant coatings in different industries [10]. This method offers several benefits over other coating methods.…”

Section: Advantages and Limitations Of Edcmentioning

confidence: 99%

“…This allows the transferred material of the tool to produce a coating on the work-piece [9]. EDC can result in improvement of properties like hardness, corrosion and wear resistance, with no appreciable change in the bulk characteristics of work-piece material [6,7,10]. Hence, electro discharge coating has the potential of turning into a useful substitute for surface modification method.…”

Section: Introductionmentioning

confidence: 99%

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A Framework for Surface Modification by Electrical Discharge Coating using Variable Density Electrodes

2021

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Surface modification is the process of altering physical or chemical characteristics of the work-piece surface. In this paper, various surface modification techniques have been discussed. One of the most appropriate surface modification technique is electrical discharge coating (EDC), in which the hard material is made to deposit onto the work-piece in a state of reverse polarity condition. Different mechanisms of carrying out EDC are presented. Deliberate material transfer takes place by using electrodes or by dispersant of metal powders into the di-electric. A detailed review of the literature on the theme of surface modification through the EDC has been conducted. In last, a framework for conducting surface modification by EDC employing using density electrodes of same material is presented.

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“…The main application of coating of the surface is to provide the protection from environmental deterioration, provide smooth surface with different properties like low coe cient of friction and high hardness etc [11] [12]. One of the applications of electro discharge coating used to increase tool-life of any cutting tool by decreasing the coe cient of friction and by increasing the hardness after coating with the help of EDC.…”

Section: Introductionmentioning

confidence: 99%

Effect of Various Process Parameters of EDC on Mild Steel Substrate and their Properties

Patel

Pradhan

2021

Preprint

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In the present study, A layer of the modified composite coated surface is made using Copper, molybdenum disulfide, and hexagonal boron nitride. For this process, Electrical discharge machine (EDM) is used but in reverse polarity. Various factors of the machine influenced the thickness of the deposited layer like the amplitude of peak current, duty factor, powder mixing ratio, used etc. For the deposition process, green compacted electrodes which was made after mixing the powder material in mortar for approximately 2.5 hour and post processing in Hot mount press moulding machine. After that the mixture powder was put in the Hot mounting press machine to made green compact electrode with specific parameters. Experiment was performed on EDM and many analysis were carried out to study the morphology of the coated surface. To get the morphology of the coated layer, FESEM images were examined and found the satisfying uniform distribution of deposited layer constituents with material powder mixing ratio of (Cu/HBN/MoS2) at (20/40/40) got with 50% duty factor and 10 Ampere peak current amplitude. Also done XRD, for the evidence of Cu, MoS2 and HBN.

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Surface modification and functionalization by electrical discharge coating: a comprehensive review

Cited by 62 publications

References 150 publications

A comparison on microstructure and mechanical properties of electric discharge metal matrix nickel and silica composite coating on duplex stainless steel

A comparison on microstructure and mechanical properties of electric discharge metal matrix nickel and silica composite coating on duplex stainless steel

A Framework for Surface Modification by Electrical Discharge Coating using Variable Density Electrodes

Effect of Various Process Parameters of EDC on Mild Steel Substrate and their Properties

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