Electrodeposition of Ni-W gradient coatings

Suvorov, Dmitriy V.; Gololobov, G. P.; Tolstogouzov, A.; Karabanov, Sergey M.; Tarabrin, Dmitriy Yu.; Rybin, N. B.; Stryuchkova, Yu. M.; Serpova, M. A.; Korotchenko, V. A.

doi:10.1088/1742-6596/857/1/012047

Cited by 2 publications

(2 citation statements)

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“…6 µm. In these figures, one sees a rather dense net of microcracks on the surface, resulting either from hydrogen embrittlement or residual stress [30,31]. This net is formed in a stochastic manner and coincides with globule boundaries, but only for some fragments.…”

Section: Resultsmentioning

confidence: 97%

Electrochemical Deposition of Ni–W Crack-Free Coatings

et al. 2018

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The main features of electrochemical deposition of coatings based on Ni-W binary alloy in the pulse current mode using pyrophosphate electrolytes were studied. Two electrolytes with a pH of 8.7 and 9.5 were used. The deposition was carried out with the current density varying in the range of 0.01-0.1 A•cm −2 , and the duty cycle (the relative pulse duration) was changed within the range 20-100%. The surface morphology and elemental and phase composition of the coatings were studied by scanning electron microscopy, energy-dispersive X-ray microanalysis and X-ray diffractometry. The experimental conditions allowing us to achieve the maximum Faradaic efficiency and W content in the coatings were determined. It was found that the pulse current mode enabled the fabrication of crack-free coatings with a thickness greater than 6 µm.

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Section: Resultsmentioning

confidence: 97%

Electrochemical Deposition of Ni–W Crack-Free Coatings

et al. 2018

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“…FG coatings lead to a lower delamination and fragmentation due to the properties not changing immediately and rapidly [16,18]. Techniques including powder metallurgy, Physical vapor deposition (PVD) and Chemical vapor deposition (CVD), thermal spraying and electroplating have been used for creating FG coatings [19]. In the DC current method, FG coatings can be produced by varying the deposition current, stirring rate and rate of particles injection to the bath.…”

Section: Introductionmentioning

confidence: 99%

Study on functionally graded Zn–Ni–Al₂O₃ coatings fabricated by pulse-electrodeposition

Shourgeshty

Mahmood

Karimzadeh

2019

Surface Engineering

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Functionally graded Zn-Ni-Al 2 O 3 coatings were electroplated by continuously changing the duty cycle/frequency. Two types of graded coatings were deposited; the first type was synthesised through gradual reduction in the duty cycle from 88 to 11% at a certain frequency and the second type was plated by increasing the frequency gradually from 100 to 1500 Hz at a constant duty cycle. Microstructure and composition of coatings were determined by scanning electron microscope equipped with energy-dispersive spectroscopy. Corrosion behaviour was studied by potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS); and tribological properties were evaluated using the pin-ondisc test. The results showed in the first type, Ni and alumina contents, and microhardness were increased towards the surface. But in the second type, composition was less affected through frequency alterations. Increasing the frequency raised the corrosion rate in the range of 2.9-8.7 μA cm −2 and improved the wear resistance.

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Electrodeposition of Ni-W gradient coatings

Cited by 2 publications

References 1 publication

Electrochemical Deposition of Ni–W Crack-Free Coatings

Electrochemical Deposition of Ni–W Crack-Free Coatings

Study on functionally graded Zn–Ni–Al₂O₃ coatings fabricated by pulse-electrodeposition

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Electrodeposition of Ni-W gradient coatings

Cited by 2 publications

References 1 publication

Electrochemical Deposition of Ni–W Crack-Free Coatings

Electrochemical Deposition of Ni–W Crack-Free Coatings

Study on functionally graded Zn–Ni–Al2O3 coatings fabricated by pulse-electrodeposition

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Study on functionally graded Zn–Ni–Al₂O₃ coatings fabricated by pulse-electrodeposition