Evaluation of ionic liquids as lubricants in micro milling – process capability and sustainability

Pham, Minh-Quan; Yoon, Hae-Sung; Khare, Varsha; Ahn, Sung‐Hoon

doi:10.1016/j.jclepro.2014.04.055

Cited by 72 publications

(33 citation statements)

References 40 publications

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“…It explains why both 2HEAPe and the commercial lubricant allowed to conduct the BUT tests successfully and with similar results. Other authors also observed similar performances between imidazoliumbased ionic liquids and conventional cutting fluids for micro-milling application 30 . In addition, an advantage of using protic ionic liquids as simple as the ones used in this work is their biodegradability and low ecotoxicity, compared to oils and ionic liquids with more complex structures, which eases their disposal 32,33 .…”

Section: Lubricant Fluidmentioning

confidence: 65%

“…Research of aluminum-steel contacts is, in its most, focused on how the structure of different ionic liquids influences on the coefficient of friction and the interaction contacts-ionic liquids, through tests using the tribometer [24][25][26][27][28][29] . A work reports the use of imidazolium-based ionic liquids for micro-milling processes 30 . In this research 30 , the ionic liquids were used as cutting oil and yielded a similar performance in comparison with conventional cutting fluids.…”

Section: Introductionmentioning

confidence: 99%

“…A work reports the use of imidazolium-based ionic liquids for micro-milling processes 30 . In this research 30 , the ionic liquids were used as cutting oil and yielded a similar performance in comparison with conventional cutting fluids. Besides, their use for this kind of application involves the realization of tests in laboratory, like those with the tribometer, before their macro-scale use, for example to manufacture a metallic cup.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Protic Ionic Liquids Used as Metal-Forming Green Lubricants for Aluminum: Effect of Anion Chain Length

et al. 2017

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Among the applications for protic ionic liquids (PILs), lubrication is one of the newest and the most promising. In this work, ammonium-based protic ionic liquids were tested as lubricant fluids for aluminum-steel contacts. PILs were synthesized with 2-hydroxyethylamine (2HEA) and a carboxylic acid (formic and pentanoic), aiming to understand the effect of two different anion chain lengths on the lubricant behavior. The synthesized PILs were characterized by RMN, FTIR and TGA. Wear tests, conducted using a ball-on-plate configuration, showed that the increase of the anion carbon chain length in the PIL structure reduced significantly the coefficient of friction value. Besides, after the wear tests, the PILs structural integrity was not affected. In the same way, bending under tension (BUT) tests evidenced that the performance for stamping conditions of the PIL with the longest anion carbon chain was similar to that of the commercial lubricant. Since, both formed a uniform tribofilm, developed the same lubrication regime and the drawing forces values were close and constant. Hence, the ionic liquid obtained with 2HEA and pentanoic acid (2HEAPe) is as suitable as the commercial lubricant for metal forming processes.

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Section: Lubricant Fluidmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Protic Ionic Liquids Used as Metal-Forming Green Lubricants for Aluminum: Effect of Anion Chain Length

et al. 2017

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“…Ionic liquids are liquid salts, consisting of an organic cation and an inorganic anion; they have a low vapor pressure, are non-flammable and have a high thermal stability. The test series showed that workpieces machined with ionic fluids reach similar cutting forces and similar roughness values to those machined with commercially available metal cutting fluids [14]. Overall, the impact of MCF in microgrinding is rarely investigated.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis for the Use of Sodium Dodecyl Sulfate as a Soluble Metal Cutting Fluid for Micromachining with Electroless-Plated Micropencil Grinding Tools

et al. 2017

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Abstract:Microgrinding with micropencil grinding tools (MPGTs) is a flexible and economic process to machine microstructures in hard and brittle materials. In macrogrinding, cooling and lubrication are done with metal cutting fluids; their application and influence is well researched. Although it can be expected that metal cutting fluids also play a decisive role in microgrinding, systematic investigations can hardly be found. A metal cutting fluid capable of wetting the machining process, containing quantities as small as 0.02% of the water-soluble fluid sodium dodecyl sulfate was tested in microgrinding experiments with MPGTs (diameter~50 µm; abrasive grit size 2-4 µm). The workpiece material was hardened 16MnCr5.

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“…Particularly for the case of micro-machining, novel lubricants such as graphene based lubricants or solid lubricants can be effective [69,70]. With FIB milling, scanning paths were investigated to minimize material redeposition phenomena.…”

mentioning

confidence: 99%

Hybrid 3D printing by bridging micro/nano processes

Yoon

Jang

Kim

et al. 2017

J. Micromech. Microeng.

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The aim of this work was to develop a novel hybrid manufacturing method for nanoscale three-dimensional (3D) printing with multi-material capabilities. 3D structuring methods at the micro/nanoscale are major goals of various engineering fields, and much work has been carried out to improve the minimum feature size, geometrical complexity, and material selection. With the aim of nanoscale multimaterial printing, a hybrid process was reported with an integrated nanoparticle deposition system (NPDS) and focused ion beam (FIB) system; however this process has limitations in terms of surface roughness and control over the layer thickness, as well as with the process scale, and furthermore, lack of sacrificial layers.In this dissertation, a novel hybrid process is described, which combines aerodynamically focused nanoparticle (AFN) printing, micro-machining and focused ion beam (FIB) milling. AFN printing is based on NPDS, and micromachining was used for local planarization. In addition to these processes, spincoating was used to fabricate sacrificial layers. By bridging these different II micro/nanoscale processes, the resulting hybrid process can address the limitations of the individual processes.To create the hybrid process, each process was investigated to enable compatibility. With the AFN printing system, the surface morphology of a detached substrate was observed, and the bonding mechanism between the substrate and nanoparticles was investigated. A novel printing strategy was identified to reduce the scale of the process. With the micro-machining system, different tool geometries were investigated. Complex geometries inspired by conventional-scale tools were implemented on the micro-scale, and their effects were investigated. With the FIB system, material re-deposition phenomena were investigated to reduce defects that occur during ion sputtering. A novel path-generation strategy was identified and investigated for different scanning paths.Process capability is discussed using fabrication examples and functional applications. The novel hybrid process represents a significant advance in the state of the art, and enables far improved process scales or dimensional degree of freedom, without losing the advantages of broad choice of materials.3D-pinted micro bi-material cantilevers were fabricated as a thermal actuator.The mechanical and thermal properties of the structure were investigated using an in-situ measurement system, and irregular thermal phenomena were analyzed. It is expected that these in-situ measurements of the 3D printed microstructure will contribute to materials research.Various 3D structures can be fabricated using the process described here from a range of metal/ceramic inorganic materials, including polymers. In particular, it is expected that the process will contribute to the area of customized nanoscale structuring, with potential applications in medical treatments. It is also expected that this work will contribute to further improvements in manufacturing technology by combining different m...

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Evaluation of ionic liquids as lubricants in micro milling – process capability and sustainability

Cited by 72 publications

References 40 publications

Protic Ionic Liquids Used as Metal-Forming Green Lubricants for Aluminum: Effect of Anion Chain Length

Protic Ionic Liquids Used as Metal-Forming Green Lubricants for Aluminum: Effect of Anion Chain Length

Experimental Analysis for the Use of Sodium Dodecyl Sulfate as a Soluble Metal Cutting Fluid for Micromachining with Electroless-Plated Micropencil Grinding Tools

Hybrid 3D printing by bridging micro/nano processes

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