Electrochemical Formation of Laminar Deposits of Controlled Structure and Composition: II . Dual Current Pulse Galvanostatic Technique

Despić, A.R.; Jović, V.D.; Spaić, S.

doi:10.1149/1.2096987

Cited by 48 publications

(13 citation statements)

References 11 publications

(16 reference statements)

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“…The bath composition and its operating conditions are listed in Table I. Trisodium citrate was chosen as the complexing agent because of several reasons: it provides a low surface roughness for the deposited samples; it decreases the amount of stress in Ni rich alloys at higher current densities; it has inherently less toxic nature, also found to act as a leveling agent, 26 a brightening agent 14 and a buffering agent. 27 The electrolyte solutions were prepared from analytical grade purity chemicals and distilled water and the pH was adjusted to a value of 4 using H 2 SO 4 .…”

Section: Methodsmentioning

confidence: 99%

Fabrication of a Ni-Cu Thin Film Material Library Using Pulsed Electrodeposition

Palli¹,

Hamann²,

Wambach³

et al. 2014

J. Electrochem. Soc.

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A thin film composition gradient library of the Ni-Cu alloy system is generated through an electrodeposition technique using a complexing citrate electrolyte bath in a modified Hull cell. Energy dispersive X-ray spectroscopy, scanning electron microscopy and automated X-ray diffraction are performed to assess composition, surface morphology, and crystallographic structure of the deposited film as a function of the lateral position on the materials library. The results confirmed deposition of single phase polycrystalline f.c.c. Ni-Cu alloy system with varied lateral composition and lattice parameter, a fcc as well.

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Section: Methodsmentioning

confidence: 99%

Fabrication of a Ni-Cu Thin Film Material Library Using Pulsed Electrodeposition

Palli¹,

Hamann²,

Wambach³

et al. 2014

J. Electrochem. Soc.

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“…However, many studies show that sound alloy thin films are fabricated from citrate‐based electrolytes in which citrate acts as complexing agent because of its higher buffer capacity . Citrate ion can also be used as leveling agent , brightening agent , and buffering agent . Priscott (in 1959) had first used citrate baths to fabricate Ni‐Cu alloy thin films and studied the influence of plating parameters such as current density, temperature, and agitation of solution on the composition of the deposit.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and experimental investigation of combinatorial electrodeposition of Ni‐Cu material library using modified Hull cell

Palli

Dey

2017

Physica Status Solidi (a)

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Phone: þ91 (0)40 2301 6096, Fax: þ91 (0)40 2301 6032Numerical simulation of single run electrodeposition of Ni-Cu material library fabricated from citrate plating bath in a modified Hull cell is carried out at an applied average current density of 2 mA cm À2 by considering multiple electrode reactions. These electrode reactions include reduction of copper ions and nickel ions and hydrogen generation reaction along with influence of diffusion of metal species and Butler-Volmer kinetic rate equations. From the model, partial and total current densities, alloy compositions, and current efficiencies during codeposition of Ni-Cu alloy as a function of position on the working electrode is predicted. Ni-Cu thin film combinatorial material library is also fabricated experimentally under similar conditions used in the simulation. An acceptable agreement is noticed from the comparison of the simulated results with experimental data. Scanning electron microscopy (SEM) studies reveal the distinct changes in the surface morphology of the films at different positions on the substrate. The measured room temperature electrical resistivity values for the fabricated material library at 2 mA cm À2 are compared with the reported data of the metallurgical processed bulk Ni-Cu alloys and found that there is a relatively good match between them.Combinatorial strategy used for fabrication of Ni-Cu material library through electrodeposition.

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“…In addition, the process might be more time consuming and difficult to automate in comparison to the alternate technique. In SBT, the metal ions required to form both deposit layers are contained in the single electrolyte and the alloy deposition is achieved by alternately changing the plating current/ potential, possibly in combination with a modulation of the mass transport towards the cathode [9][10][11]. Although significant success has been achieved with the SBT, the selection of constituents is limited because their deposition potentials must be sufficiently different to allow a separate deposition of each.…”

Section: Introductionmentioning

confidence: 99%

Electrolytic preparation of cyclic multilayer Zn–Ni alloy coating using switching cathode current densities

Venkatakrishna

Hegde

2010

J Appl Electrochem

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Cyclic multilayer alloy (CMA) coating of Zn-Ni was developed on mild steel using single bath technique, by proper manipulation of cathode current densities. The thickness and composition of the individual layers were altered precisely and conveniently by cyclic modulation of cathode current densities. Multilayer coatings, having sharp change in compositions were developed using square current pulses. Gelatin and sulphanilic acid (SA) acid were used as additives. Laminar deposits with different configurations were produced, and their corrosion behaviors were studied, in 5% NaCl solution by electrochemical methods. It was observed that the corrosion resistance of CMA coating increased progressively with number of layers (up to certain optimal numbers) and then decreased. Cyclic voltammetry study demonstrated the role of gelatin and SA in multilayer coating. The coating configuration has been optimized for the peak performance against corrosion. The substantial decrease of corrosion rate, in the case of multilayer coatings was attributed to the changed intrinsic electric properties, evidenced by Electrochemical Impedance Spectroscopy (EIS) study. The surface morphology and its roughness were examined by Atomic Force Microscopy (AFM). The surface and crosssectional view of coatings were examined, using Scanning Electron Microscopy (SEM). X-ray photoelectron spectrum (XPS) study was carried out for surface analysis. The relative performance of pure Zn, monolithic and CMA coatings were compared and discussed.

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Electrochemical Formation of Laminar Deposits of Controlled Structure and Composition: II . Dual Current Pulse Galvanostatic Technique

Cited by 48 publications

References 11 publications

Fabrication of a Ni-Cu Thin Film Material Library Using Pulsed Electrodeposition

Fabrication of a Ni-Cu Thin Film Material Library Using Pulsed Electrodeposition

Numerical simulation and experimental investigation of combinatorial electrodeposition of Ni‐Cu material library using modified Hull cell

Electrolytic preparation of cyclic multilayer Zn–Ni alloy coating using switching cathode current densities

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