Temperature dependence of viscosity and relation with the surface tension of ionic liquids

Ghatee, Mohammad Hadi; Zare, Morteza; Zolghadr, Amin Reza; Moosavi, Fatemeh

doi:10.1016/j.fluid.2010.01.010

Cited by 138 publications

(113 citation statements)

References 49 publications

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“…This result is in accordance with the forecasts. Taking into account the influence of temperature on diffusion [35], chemical reactions kinetics and liquid viscosity [40], higher temperatures correspond to a higher ability of liquid aluminum to react with the super duplex stainless steel substrates. On the other hand, this effect is balanced by the melting tendency of aluminum-rich intermetallic compounds, which are generated by the interaction of aluminum with the investigated alloy.…”

Section: Discussionmentioning

confidence: 99%

Hot-Dip Aluminizing on AISI F55–UNS S32760 Super Duplex Stainless Steel Properties: Effect of Thermal Treatments

Ciuffini

Barella

Cecca

et al. 2017

Metals

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Abstract:The behavior of super duplex stainless steels AISI F55-UNS S32760 in hot-dip aluminizing process has been studied, investigating the influence of cold working and of different initial microstructures obtained through a preliminary thermal treatment. The microstructural features examined are the secondary austenite precipitation, the static recovery of ferrite and the thermal dissolution of austenite within ferritic matrix. The hot-dip aluminizing temperature has been optimized through sessile drop tests. The treatment has been performed at 1100 • C for 300 s, 900 s and 2700 s. A strong chemical interaction occurs, generating intermetallic compounds at the interface. Molten aluminum interacts exclusively with the ferritic phase due to its much higher diffusivity in this phase coupled with its marked ferrite-stabilizer behavior. Thus, the influence of cold working is not remarkable, since the strains are mainly allocated by austenitic phase. The diffusivity of aluminum increases due to lattice defects thermally generated and, mainly, to influence given by grain boundaries, multiplied by secondary austenite precipitation, which act as short-circuit diffusion paths. Ni and Cr contents in the ferritic matrix have an influence but not highly relevant. Then, the best starting condition of the super duplex stainless steel substrates, to obtain a thick interfacial layer, are the thermal annealing at 1080 • C for 360 s/mm after a solution thermal treatment at 1300 • C for 60 s/mm.

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Section: Discussionmentioning

confidence: 99%

Hot-Dip Aluminizing on AISI F55–UNS S32760 Super Duplex Stainless Steel Properties: Effect of Thermal Treatments

Ciuffini

Barella

Cecca

et al. 2017

Metals

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“…While ionic liquids are frequently studied and utilized for their physical and chemical properties and as an electrolyte [19], [20], [21], [22], few utilize ionic liquid as an electric component for micro devices [23], [24]. In order to deliver an appreciable electrical power for our applications, an ionic liquid with a relatively large electrochemical window and high electrical conductivity is preferred.…”

Section: B Electric Power and Signal Transmissionmentioning

confidence: 99%

Electrostatic Side-Drive Rotary Stage on Liquid-Ring Bearing

Sun

Liu

Sen

et al. 2014

J. Microelectromech. Syst.

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Abstract-We present an electrostatically actuated rotary stage featuring liquid rings, which serve as both mechanical bearings and electric connections between the rotor and the substrate. The liquid rings are formed by confining a liquid inside hydrophilic grooves and repelling it from the superhydrophobic surfaces outside the grooves. Made of a fluid, the liquid-ring bearing avoids the dry friction of the solid bearings, significantly improving the reliability. Formed as rings, it avoids the resistance of contact-angle hysteresis sliding over droplets, and hence dramatically reducing the static friction. Furthermore, surface tension facilitates the self-alignment of the rotor to the substrate and stator during the assembly and provides the stability against drift and shock during operation. Electrically, each liquid ring passes an independent electric signal, allowing a direct electrical path between the substrate and potential components on the rotor. A three-phase electrostatic rotary stage has been design, fabricated, and tested. The minimum torque to initiate the rotation is ~2.5nNm -hundreds of times smaller than droplet-based counterparts. The device has operated successfully by applying sequential voltages of 50V DC between the rotor and the stators. The electric transmission has been verified by powering an LED on a rotating rotor. This is the first report of an electrostatically actuated rotating microdevice with a liquid bearing and a direct power transmission.

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“…Using photoactive anionic porphyrin as counter anions towards the ionic liquid which was grafted onto graphene nanosheets through the noncovalent interactions of anion and/or cation, Karousis and coworkers [16] developed some optoelectronic devices. Recent studies [17,18] show that for a hydrophobic imidazolium based ionic liquid, the imidazolium ring slightly tilted to the surface plane, so that ionic liquid molecules can be orientated at the graphene surface.…”

Section: Introductionmentioning

confidence: 99%

A novel sensing platform based on ionic liquid integrated carboxylic-functionalized graphene oxide nanosheets for honokiol determination

Zhang

Chen

Liu

et al. 2015

Electrochimica Acta

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Temperature dependence of viscosity and relation with the surface tension of ionic liquids

Cited by 138 publications

References 49 publications

Hot-Dip Aluminizing on AISI F55–UNS S32760 Super Duplex Stainless Steel Properties: Effect of Thermal Treatments

Hot-Dip Aluminizing on AISI F55–UNS S32760 Super Duplex Stainless Steel Properties: Effect of Thermal Treatments

Electrostatic Side-Drive Rotary Stage on Liquid-Ring Bearing

A novel sensing platform based on ionic liquid integrated carboxylic-functionalized graphene oxide nanosheets for honokiol determination

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