Electrocodeposition of Ni composites and surface treatment of SiC nano-particles

Pinate, Santiago; Ispas, Adriana; Leisner, Peter; Zanella, Caterina

doi:10.1016/j.surfcoat.2020.126663

Cited by 16 publications

(13 citation statements)

References 37 publications

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“…In the solution with SiC500 the curve was displaced, showing the influence of the particle over the HER. A previous study [23] showed the buffering capability of these particles by titrating a solution with particles, starting from pH 3.0, with NaOH as titrator. The solution (water, pH = 3.0) without particles showed a shift in pH as the titrator was added, whereas in the solution with particles, the pH change was slower or did not occur, in the case of the SiC500.…”

Section: Results and Discussion Electrodepositionmentioning

confidence: 99%

“…The data of pure Ni deposited using stirring [22] from a previous study were included as a benchmark. The data from Ni/SiC50 and Ni/SiC500 under magnetic stirring were also extracted from a previous study [23]. All samples were produced under the exact conditions as described in Table 1.…”

Section: Experimental and Characterisation Details Electrolyte Composition And Experimental Set-upmentioning

confidence: 99%

“…An adsorption-desorption phenomenon of H ? on the particles surface [23,27,36] could have altered the pH in the vicinity of the cathode, prompting the \ 211 [ crystal growth, which is associated with the presence of nickel hydroxide in the electrodeposition of nickel [18]. Tudela et al [37] also observed in additive-free nickel deposits a more dominant \ 211 [ orientation as the result of an increased inhibition effect by Ni(OH) 2 , identifying as well an inverse relationship where the 'free' (100) growth mode was reduced in favour of the \ 211 [ intensity.…”

Section: Microstructure and Internal Stressesmentioning

confidence: 99%

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Effects of SiC particles codeposition and ultrasound agitation on the electrocrystallisation of nickel-based composite coatings

et al. 2021

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This study analysed the influence of the codeposition of SiC particles with different sizes: 50 nm, 500 nm and 5 μm, and the type of bath agitation (stirring or ultrasonic) on the electrocrystallisation of nickel coatings. The composites matrix microstructure was analysed by means of SEM, EBSD and XRD, to evaluate the grain size, crystal orientation, and internal stresses and was benchmarked against pure nickel samples electrodeposited in equivalent conditions. The codeposition of nano- and microsize particles with an approximate content of 0.8 and 4 vol.%, respectively, caused only a minor grain refinement and did not vary the dominant < 100 > crystal orientation observed in pure Ni. The internal stress was, however, increased by particles codeposition, up to 104 MPa by nanoparticles and 57 MPa by microparticles, compared to the values observed in pure nickel (41 MPa). The higher codeposition rate (11 vol.%) obtained by the addition of submicron-size particles caused a change in the grain growth from columnar to equiaxial, resulting in deposits with a fully random crystal orientation and pronounced grain refinement. The internal stress was also increased by 800% compared to pure nickel. The ultrasound (US) agitation during the deposition caused grain refinement and a selective particle inclusion prompting a decrease in the content of the particles with the larger particles. The deposits produced under US agitation showed an increase in the internal stresses, with double values compared to stirring. The increase in the deposits microhardness, from 280 HV in pure Ni to 560 HV in Ni/SiC submicron-US, was linked to the microstructural changes and particles content. Graphical abstract

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Section: Results and Discussion Electrodepositionmentioning

confidence: 99%

Section: Experimental and Characterisation Details Electrolyte Composition And Experimental Set-upmentioning

confidence: 99%

Section: Microstructure and Internal Stressesmentioning

confidence: 99%

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Effects of SiC particles codeposition and ultrasound agitation on the electrocrystallisation of nickel-based composite coatings

et al. 2021

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“…The composites were made from as-produced (AP) or surface treated (ST) particles: SiC50 (gnmÓ #SiC-110 spherical b-SiC 50 nm), SiC60 (Iolitec GmbH #NC-0002 spherical b-SiC 60 nm) or SiC500 (gnmÓ #SiC-110 irregular angular-shaped b-SiC 500 nm). The pretreatment of the particles was based on nitric acid and defined in Pinate et al [15].…”

Section: Experimental and Characterization Details Preparation Of Sam...mentioning

confidence: 99%

“…In the present study, microindentation and advanced microstructural analyses were used to define the strengthening mechanisms present in electrodeposited nickel-based composite coatings produced under comparable conditions in previous studies [13][14][15][16][17]. Different pure nickel deposits electroplated under various current densities were used to establish a Hall-Petch relationship and define the contribution of the grain size hardening effect of the matrix in the electrodeposits [18] driven by electric currents: the finer the grains the harder is the resulting material due to the increase effect of grain boundaries as impediment to the dislocation movements.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Strengthening mechanisms and wear behavior of electrodeposited Ni–SiC nanocomposite coatings

2022

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The present paper describes the study of the synergism between the matrix microstructure and reinforcement phase in electrodeposited nanocomposite coatings. Adding hard nanoparticles into the metallic matrix leads to hardening of the coating. The effects of particle load, size and dispersion on hardening as well as their influence on metal microstructure refinement were studied. The relative contributions of strengthening factors in Ni/nano-SiC composites, namely, Hall–Petch strengthening, Orowan strengthening, enhanced dislocation density and particles incorporation, were evaluated. The production of various coatings under different stirring conditions and powders resulted in dissimilarities in the incorporation of particles. The Hall–Petch relationship for pure nickel was determined using samples produced under different current densities. Additionally, the grain refinement resulting from the particle codeposition and agitation mode were identified as influential factors in grain-size strengthening. Dislocation density strengthening was significant in electrodeposits produced using ultrasonic agitation, while it was negligible in layers produced under other conditions. Particles codeposition affected the magnitude of Orowan strengthening, resulting in cases where strengthening was negligible despite the presence of particles. The sum of contributions and the modified Clyne methods were used to calculate the hardness of the composites based on the contribution of each strengthening factor, and the calculation results were in good agreement with experimental data. The wear behavior of the composites was analyzed by pin-on-disk measurements, and the results correlated with the strengthening mechanisms. Particle size, dispersion and content increased the strengthening effects as well as the hardness and wear resistance of the coatings. Graphical abstract

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Investigation of the properties of nickel‐boron/nano‐diamond composite coatings upon pre/post heat treatment

Rezagholi

Mirjani

Milani

et al. 2023

Materialwissenschaft Werkst

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The study has explored the physical and chemical properties of nickel‐boron/nano‐diamond composite coatings upon pre/post heat treatment. The nano‐composite coatings were produced by electroless plating. In fact, the effects of using the nano‐diamond additives (0 g l−1, 0.1 g l−1, 0.3 g l−1, 0.5 g l−1, 0.7 g l−1) were investigated in pre/post heat treatment. According to the results, the micro‐hardness of the nickel‐boron/nano‐diamond composite coating produced in the bath containing 0.5 g l−1 nano‐diamond additive reached to 1005 HV 0.05 upon post‐heat treatment. Also, the corrosion resistance of the nickel‐boron/nano‐diamond composite coatings was modified by using the nano‐additive or heat treatment. But, adding nano‐diamond particles reduced the ductility and wear resistance of the nickel‐boron coatings. We also found, modification of the properties (ductility and wear resistance) of the composite coatings was achieved by using the heat treatment.

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Electrocodeposition of Ni composites and surface treatment of SiC nano-particles

Cited by 16 publications

References 37 publications

Effects of SiC particles codeposition and ultrasound agitation on the electrocrystallisation of nickel-based composite coatings

Effects of SiC particles codeposition and ultrasound agitation on the electrocrystallisation of nickel-based composite coatings

Strengthening mechanisms and wear behavior of electrodeposited Ni–SiC nanocomposite coatings

Investigation of the properties of nickel‐boron/nano‐diamond composite coatings upon pre/post heat treatment

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