Development of a maskless electrochemical texturing method

Costa, H.L.; Hutchings, I.M.

doi:10.1016/j.jmatprotec.2008.09.004

Cited by 62 publications

(24 citation statements)

References 8 publications

(10 reference statements)

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“…One of these technologies is texturing the surface with micro dimples [4][5][6]. Such a surface texturing can be performed by indentation [7], chemical etching [8] or laser ablation [9]. Out of these techniques, laser surface texturing (LST) has prevailed as the most successful one due to its flexibility and ecological as well as economical superiority.…”

Section: Introductionmentioning

confidence: 99%

Laser Textured Surfaces for Mixed Lubrication: Influence of Aspect Ratio, Textured Area and Dimple Arrangement

2017

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Abstract:Unidirectional sliding experiments with polished and laser textured steel surfaces were carried out to investigate the effects of different textured area densities, aspect ratios and dimple arrangements. The system was lubricated with Polyalphaolefin (PAO) at 100 °C and the contact pressure was 3 MPa. For measuring Stribeck curves, the sliding speed was controlled between 40 and 2000 mm/s. The textured area density was varied between 5% and 30%, with the lowest friction values found for 10%. Aspect ratios ranging from 0.02 to 0.2 were investigated and for 0.1 the lowest friction values were measured. The dimple arrangements tested were cubic, hexagonal and a random distribution for a textured area density of 10% and an aspect ratio of 0.1. Our results demonstrate that the dimple arrangement does affect friction values, hinting to the fact that individual texture elements do influence each other. The optimum dimple arrangement was found in a hexagonal packing. This systematic variation of these three key texturing parameters for the morphological texturing of a tribological surface with dimples will allow a strategic choice of texturing parameters. This makes the most of the tremendous potential that laser surface texturing has for reducing friction forces and thereby CO2 emissions.

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Section: Introductionmentioning

confidence: 99%

Laser Textured Surfaces for Mixed Lubrication: Influence of Aspect Ratio, Textured Area and Dimple Arrangement

2017

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“…曲宁松等人 [12] 和 Zhang 等人 [13] 则采用干膜技术对这种阴极掩膜电解加工新工艺进行了研究与应用拓展. 进一步, Costa 等人 [14] 和 Parreira 等人 [15] 则把工具阴极通孔化, 以借助阴极与掩膜的通孔实现加工间隙喷射式给液, 进而达到减小加工间隙、提高加工精度与加工效率的目的. 尽管如此, 相比(阳极)掩膜电解加工, 金属电化学溶解原理的固有局限性及更大的极间间隙决定了阴极掩膜电解加工技术在保持与提高加工精度、定域性及其可控性方面具有更大挑战性.…”

Section: 引言unclassified

Active through-mask electrochemical machining with its interelectrode gap filled with flexible porous material

et al. 2016

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“…Various techniques are also offered for the generation of microsurface textures such as LIGA technology, electron beam machining, through mask electrochemical micromachining, laser beam machining, ion beam machining, etc. However, these methods are incapable of the demands of economical microsurface structures in industrial manufacturing that can be generated in mass production [17]. These methods have several limitations such as heat affected zone, lower machining accuracy, lower surface finish, etc.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of array of micro circular impressions using different electrolytes by maskless electrochemical micromachining

Kunar

Rajkeerthi²,

Mandal

et al. 2020

Manufacturing Rev.

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Maskless electrochemical micromachining (EMM) is a prominent technique for producing the array of micro circular impressions. A method for producing the array of micro circular impressions on stainless steel workpiece applying maskless electrochemical micromachining process is presented. The experimental setup consists of maskless EMM cell, electrode holding devices, electrical connections of electrodes and constricted vertical cross flow electrolyte system to carry out the experimental investigation. One non-conductive masked patterned tool can produce more than twenty six textured samples with high quality. A mathematical model is developed to estimate theoretically the radial overcut and machining depth of the generated array of micro circular impressions by this process and corroborate the experimental results. This study provides an elementary perceptive about maskless EMM process based on the effects of EMM process variables i.e. pulse frequency and duty ratio on surface characteristics including overcut and machining depth for NaCl, NaNO3 and NaNO3 + NaCl electrolytes. From the experimental investigation, it is observed that the combined effect of lower duty ratio and higher frequency generates the best array of micro circular impressions using the mixed electrolyte of NaNO3 + NaCl with mean radial overcut of 23.31 µm and mean machining depth of 14.1 µm.

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Development of a maskless electrochemical texturing method

Cited by 62 publications

References 8 publications

Laser Textured Surfaces for Mixed Lubrication: Influence of Aspect Ratio, Textured Area and Dimple Arrangement

Laser Textured Surfaces for Mixed Lubrication: Influence of Aspect Ratio, Textured Area and Dimple Arrangement

Active through-mask electrochemical machining with its interelectrode gap filled with flexible porous material

Fabrication of array of micro circular impressions using different electrolytes by maskless electrochemical micromachining

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