Effects of flexible friction on the properties of nanocrystalline nickel prepared by jet electrodeposition

Wei, Zhuo; Shen, Lida; Qiu, Mingbo; Tian, Zongjun; Jiang, Wei

doi:10.1016/j.surfcoat.2017.10.058

Cited by 38 publications

(14 citation statements)

References 18 publications

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“…[43][44][45][46][47][48][49]). Figure 16 also shows hardness data for electrodeposited Ni films studied formerly in the literature [42][43][44][45][46][47][48]. In these investigations, the grain size was also determined from TEM images similar to our study, however without considering the strengthening effect of twin boundaries.…”

Section: Change Of the Hardness Due To The Additivesmentioning

confidence: 99%

Effect of bath additives on the microstructure, lattice defect density and hardness of electrodeposited nanocrystalline Ni films

Kolonits

Jenei

Péter

et al. 2018

Surface and Coatings Technology

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Experiments were performed for the study of the influence of impurities on the microstructure and hardness of nanocrystalline Ni films. The samples were prepared by electrodeposition using two basic electrolyte solutions (a sulfate-type bath and a Watts-type bath). The effect of saccharin as organic additive on the microstructure, texture and hardness was studied. It was found that the Watts bath without saccharin yielded a larger grain size compared to its sulfatetype counterpart. For both electrolyte solutions, (220) out-of-plane texture was formed in the saccharin-free films. The additive saccharin eliminated the texture and yielded very fine microstructures with high dislocation densities and twin fault probabilities for both solution types. The influence of saccharin on the defect density was higher for the film prepared from the sulfate-type bath. It was revealed that there is a correlation between the defect density and the grain size. When saccharin was added to the Watts bath, the combined effect of nickelchloride and saccharin led to a bimodal grain size distribution. An additional sample was deposited from an electrolyte containing trisodium citrate to investigate the sodium incorporation in the Ni layers. The correlation between the microstructure and the hardness of the films was discussed in detail.

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Section: Change Of the Hardness Due To The Additivesmentioning

confidence: 99%

Effect of bath additives on the microstructure, lattice defect density and hardness of electrodeposited nanocrystalline Ni films

Kolonits

Jenei

Péter

et al. 2018

Surface and Coatings Technology

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show abstract

“…There is mainly crystal nucleation and growth in electrodeposition. 9 In the absence of a magnetic field, the metal ions were mainly affected by the electric field force. If micro-protrusions or pits were generated at a certain point during the deposition process, the discharge of micro-protrusions were more concentrated and grown faster, while the pits grown slower.…”

Section: Resultsmentioning

confidence: 99%

“…8 Although the traditional jet electrodeposition can solve this problem, the coating uniformity is unsteady due to the high current density and tip discharge of the method. In recent years, researchers have implemented composite electrodeposition processes, such as the friction auxiliary process 9,10 and the magnetic field–assisted process. 11–17 The friction auxiliary process, which is controlled by mechanical force, is a contact process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Ni coating on NdFeB by magnetic jet electrodeposition

Jiang

Shen

Qiu

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part B:

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In order to lengthen the lifespan of NdFeB materials, nickel coating was manufactured by magnetic jet electrodeposition. The surface morphology, coating adhesion, and corrosion resistance of the coating were characterized and analyzed, respectively, by scanning electron microscope, scratch tester, and electrochemical workstation. The experimental results show that the surface of nickel coating which was fabricated by magnetic jet electrodeposition had no nodularity, and as a result, the surface morphology improved; furthermore, the corrosion resistance and coating adhesion of the coating improved in the effect of magnetic field intensity. When the value of the current density was 60 A/dm2 and the intensity of magnetic field was 100 mT, the coating adhesion could reach the standard in 33.4 N, which was doubled compared to the coating without magnetic field. Corrosion of the coating morphology is no longer the regional corrosion. Magnetic field is beneficial to improve the quality of coating surface morphology and reduce the corrosion current density of the coating.

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“…6H2O in the solution is to provide nickel ions for the deposition process, and the role of C7H5O3NS is to refine the grains [24]. The addition of H3BO4 not only adjusts the pH of the solution, but also enhances the electrolyte polarization layer [25]. The parameters of current and deposition time are shown in Table 2.…”

Section: Experimental Process and Parametersmentioning

confidence: 99%

“…The surface microhardness of the coating is not only affected by the grain size of the coating [30], but also by the density, purity, number of defects and structure of the coating [25,31]. In general, the coating defects are reduced, the surface quality is better, and the coating hardness is higher.…”

Section: Microhardnessmentioning

confidence: 99%

Properties of Jet electrodeposition Nickel Coating on TC4 Alloy Prepared by Selective Laser Melting

Wang¹,

Astronautics²

2019

International Journal of Electrochemical Science

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In order to solve the problems of poor surface wear resistance and low hardness of titanium alloy materials formed by selective laser melting (SLM) technology, a new method of preparing bright nickel protective coating by jet electrodeposition was proposed in this paper. The surface morphology of the coatings was characterized by field emission scanning electron microscopy. The microhardness tester, scratch tester, and friction and wear tester were used to analyze the adhesion, hardness, and wear resistance of the coatings. The results indicated that the current density has an important effect on the properties of the coatings; as the current density increases, the surface flatness gradually increases and then decreases. When the current density is 120 A/dm 2 , the microhardness of the coatings reaches 548 HV, and the adhesion strength also reaches 30.4 N. Compared with the surface of titanium alloy, the surface of the coating has better wear resistance, and the surface is more complete after friction and wear test. The wear mechanism is transformed from microscopic grinding to smearing.

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Effects of flexible friction on the properties of nanocrystalline nickel prepared by jet electrodeposition

Cited by 38 publications

References 18 publications

Effect of bath additives on the microstructure, lattice defect density and hardness of electrodeposited nanocrystalline Ni films

Effect of bath additives on the microstructure, lattice defect density and hardness of electrodeposited nanocrystalline Ni films

Preparation of Ni coating on NdFeB by magnetic jet electrodeposition

Properties of Jet electrodeposition Nickel Coating on TC4 Alloy Prepared by Selective Laser Melting

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