Effect of annealing on the structure and hardness of Ni–P–W multilayered alloy coatings produced by pulse plating

Papachristos, V.D.; Panagopoulos, C.; Wahlström, U.; Christoffersen, Lasse; Leisner, Peter

doi:10.1016/s0921-5093(99)00583-3

Cited by 25 publications

(4 citation statements)

References 22 publications

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“…In the case of Ni-W coatings, W-rich and W-depleted layers have been conducted using DC which alternatively changed through two different values. 23 In a similar study carried out on Ni-P-W coatings, the relatively high and low current densities were applied to deposit layers with different concentrations of W. 24 As mentioned earlier, there are not many studies in the case of employing other pulse parameters, such as duty cycle, to develop Ni-W and Ni-W-Al 2 O 3 nanocomposite coatings with a layered structure. Since Ni-W alloy has received much attention owing to its corrosion 25,26 and wear resistance, 27 in this study, it was attempted to electrodeposit multilayer Ni-W and Ni-W-Al 2 O 3 nanocomposite coatings using the duty cycle and deposition kinetics controlling the nickel and tungsten electrodeposition.…”

Section: Introductionmentioning

confidence: 99%

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Electrodeposition of multilayer Ni–W and Ni–W–alumina nanocomposite coatings

Mahmood

Rouhaghdam

Torabinejad

2017

Surface Engineering

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Multilayer Ni-W and Ni-W-Al 2 O 3 coatings with intermittent low and high concentrations of tungsten and alumina were electrodeposited through alternative variation of pulse parameters. Microstructural studies and elemental analyses of the coatings were carried out using scanning electron microscopy and energy dispersive X-ray spectroscopy, respectively. Profilometry and atomic force microscopy were employed to investigate the surface roughness at two different scales. Pin-on-disc wear test was used to evaluate the tribological properties. The corrosion resistance was also studied using potentiodynamic polarisation and electrochemical impedance spectroscopy methods. Results revealed that at lower duty cycles, more incorporation of alumina and more co-deposition of tungsten are achieved. Results indicated variable and alternative microhardness values corresponding to the different concentrations of tungsten and alumina in each specific layers. Wear tests demonstrated the descending trend of the wear rate as a function of sliding distance. It was found that alumina nanoparticles enhanced the corrosion resistance.

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Section: Introductionmentioning

confidence: 99%

“…In the case of Ni–W coatings, W-rich and W-depleted layers have been conducted using DC which alternatively changed through two different values. 23 In a similar study carried out on Ni–P–W coatings, the relatively high and low current densities were applied to deposit layers with different concentrations of W. 24…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of multilayer Ni–W and Ni–W–alumina nanocomposite coatings

Mahmood

Rouhaghdam

Torabinejad

2017

Surface Engineering

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“…24 Papachristos studied the effect of annealing on the structure and microhardness of three amorphous Ni-P-W multilayered coatings with different wavelengths. 25 Obviously, the microhardness of Ni-P-C g -TiO 2 coating shows a moderate hardness between Ni-P-C g and Ni-P-TiO 2 , depending on the corresponding concentration of C g and TiO 2 particles in the coating. Figure 9 shows the friction coefficient of the Ni-P and Ni-P composite coatings.…”

Section: Properties Of Ni-p Composite Coatingsmentioning

confidence: 93%

Structure and properties of Ni–P–graphite (C_g)–TiO₂ composite coating

Liu

Bian

Liu

et al. 2015

Surface Engineering

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Titanium dioxide (TiO 2 ) and graphite (C g ) particles were co-deposited with nickel-phosphorous (Ni-P) coatings through electroless deposition process. Surface morphology of the coatings was analysed by scanning electron microscope (SEM). X-ray diffraction (XRD) was used to detect the structure of the coatings. Microhardness of Ni-P-C g -TiO 2 composite coating showed a moderate hardness between Ni-P-C g and Ni-P-TiO 2 composite coating. DSC thermograms indicated that the thermostability of Ni-P coating could not be affected by TiO 2 and/or C g particles. Moreover, the friction coefficient and corrosion rate of Ni-P-TiO 2 composite coating could be decreased by the addition of graphite particles.

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“…Post-heat treatment of electroless Ni-P coatings is normally carried out in furnace. For furnace treatment, coated components have to be wholly heated up to a high temperature required for 1 h. Papachristos et al [13] have confirmed the loss in gradient nature of the coating following heat-treatment of electrodeposited Ni-W-P graded deposits at 400…”

Section: Concentration/ (G/l)mentioning

confidence: 99%

Effect of laser‐induced nanocrystallisation on the properties of electroless Ni‐P/Ni‐W‐P duplex coatings

Liu¹,

Guo

Bian³

et al. 2013

Cryst. Res. Technol.

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Key words nanocrystallisation, electroless Ni-P/Ni-W-P duplex coatings, laser treatment, adhesive wear. This paper presents a comparative study of nanocrystallisation and the wear resistance of electroless plated Ni-P/Ni-W-P duplex coatings with a single Ni-W-P coating before and after high-power diode laser treatment. Effects of the laser operating parameters on microstructures, in terms of crystallisation, porosity formation, phase transformation and grain growth, were investigated using scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX) and quantitatively X-ray Diffraction (XRD). Microhardness and wear behaviour of the coatings before and after laser treatment were evaluated by measurement of coating surface and cross-section hardness as well as un-lubricated friction and wear tests. The results revealed that in the case of laser treatment, the Ni-P/Ni-W-P duplex coatings offered better wear resistance than the single Ni-W-P coating, while the as-plated, single Ni-W-P coating showed better wear resistance than the Ni-P/Ni-W-P duplex coatings. Adhesive wear mechanism prevails in the laser-treated coatings when subjected to wear test against hardened steel material. The effects of microstructural characteristics in the coatings, in particularly the grain size of Ni 3 P phase and the degree of crystallisation, on the adhesive wear behaviour have been investigated and found to be dominant besides the effect of hardness.

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Effect of annealing on the structure and hardness of Ni–P–W multilayered alloy coatings produced by pulse plating

Cited by 25 publications

References 22 publications

Electrodeposition of multilayer Ni–W and Ni–W–alumina nanocomposite coatings

Electrodeposition of multilayer Ni–W and Ni–W–alumina nanocomposite coatings

Structure and properties of Ni–P–graphite (C_g)–TiO₂ composite coating

Effect of laser‐induced nanocrystallisation on the properties of electroless Ni‐P/Ni‐W‐P duplex coatings

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Effect of annealing on the structure and hardness of Ni–P–W multilayered alloy coatings produced by pulse plating

Cited by 25 publications

References 22 publications

Electrodeposition of multilayer Ni–W and Ni–W–alumina nanocomposite coatings

Electrodeposition of multilayer Ni–W and Ni–W–alumina nanocomposite coatings

Structure and properties of Ni–P–graphite (Cg)–TiO2 composite coating

Effect of laser‐induced nanocrystallisation on the properties of electroless Ni‐P/Ni‐W‐P duplex coatings

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Structure and properties of Ni–P–graphite (C_g)–TiO₂ composite coating