Pulse electrodeposition of adherent nickel coatings onto anodized aluminium surfaces

Frantz, Cédric; Vichery, C.; Zechner, Johannes; Frey, Damian; Bürki, Gerhard; Cebeci, Halil; Michler, Johann; Philippe, Laëtitia

doi:10.1016/j.apsusc.2014.12.091

Cited by 19 publications

(9 citation statements)

References 29 publications

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“…The thickness of the barrier layer of as-anodized layers was measured to be 210 nm, corresponding to about 1.17 nm V –1 , and was decreased to 55 nm after an isotropic chemical pore widening of 1 h. In order to obtain a barrier layer of 55 nm without enlarging the pores, the anodization potential was exponentially decreased from 180 to 47 V. A long thinning step of 3 h was chosen in order to obtain homogeneous barrier layer thickness. The homogeneity of the barrier layer thickness was ensured by monitoring the current transient curve recorded during the thinning procedure . During this period, the growth of the oxide occurs at a much slower rate and the obtained pores were only about 300 nm longer than the one measured after a simple anodization.…”

Section: Resultsmentioning

confidence: 99%

Nonaqueous Sol–Gel Synthesis of Anatase Nanoparticles and Their Electrophoretic Deposition in Porous Alumina

et al. 2017

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Titanium dioxide (TiO) nanoparticles were synthesized by nonaqueous sol-gel route using titanium tetrachloride and benzyl alcohol as the solvent. The obtained 4 nm-sized anatase nanocrystals were readily dispersible in various polar solvents allowing for simple preparation of colloidal dispersions in water, isopropyl alcohol, dimethyl sulfoxide, and ethanol. Results showed that dispersed nanoparticles have acidic properties and exhibit positive zeta-potential which is suitable for their deposition by cathodic electrophoresis. Aluminum substrates were anodized in phosphoric acid in order to produce porous anodic oxide layers with pores ranging from 160 to 320 nm. The resulting nanopores were then filled with TiO nanoparticles by electrophoretic deposition. The influence of the solvent, the electric field, and the morphological characteristics of the alumina layer (i.e., barrier layer and porosity) were studied.

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Section: Resultsmentioning

confidence: 99%

Nonaqueous Sol–Gel Synthesis of Anatase Nanoparticles and Their Electrophoretic Deposition in Porous Alumina

et al. 2017

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“…The fabrication of high quality nanowires with uniform length resulted from the full filling of nanopores is important and advantageous for many applications ranging from electrochemical sensors to cathode materials for lithium storage capacity and high-density magnetic storage medium [54][55][56]. Notably, Ni nanowires have become important for their electrochemical energy storage, catalytic, magnetic and microwave absorbing properties [57][58] as they can be manipulated easily using an external magnetic field. Co nanowires with large shape and magnetocrystalline anisotropies can be employed in the development of high-density magnetic memories [59].…”

Section: (H) (G)mentioning

confidence: 99%

Small-diameter magnetic and metallic nanowire arrays grown in anodic porous alumina templates anodized in selenic acid

et al. 2021

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Despite the introduction of selenic acid for anodic porous alumina (APA) preparation with small nanopore diameters (< 20 nm), no attempt has been made to use it in the fabrication of small-diameter magnetic and metallic nanowire arrays. In this paper, considering the high cost of selenic acid, it has been attempted to initially use oxalic acid in preparation of an ordered pattern in the first anodization step, and then employ selenic acid for the second anodization step by matching the appropriate voltage.By investigating the nanopore formation pattern in both acids, it was shown that the nanopores formed in the selenic acid had considerably smaller diameter (13 nm) than that of oxalic acid (35 nm). Under optimized conditions of electrodeposition, various metals were then grown in the selenic APA templates in order to fabricate nanowires with small diameters. The pore filling percentage and crystalline properties were also investigated.

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“…The process of electro plating [7] was conducted on that of CuNi 7030 and electroless plating [8] was done on that of the Al 5083 alloys. Pulse electro deposition method was used for coating nickel in Al 5083 [9], which was found effective for the case and it was seen that there is good bonding or adherence of Ni to the aluminium alloy surface. Giving the Nickel coating on the aluminium 5083 surface changes the flexural and dynamic behaviour of the alloy which include that of improved corrosion resistance, wear resistance, mechanical and physical properties and reducing the overall stress and that of the strain on the aluminium alloy [10].…”

Section: B Gas Tungsten Arc Weldingmentioning

confidence: 99%

Evaluation of Weld Joint: Cupro – Nickel with Aluminium 5083

Dominic*¹,

Krishnakumar²,

Saravanan³

2019

IJRTE

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Cupro-Nickel and Aluminium alloy to their series, Al 5083 and 70Cu30Ni are the critical alloys in ship building mainly in piping section. Due to the reason of having a huge difference in their physical and chemical properties, obtaining a good bonding between them by welding is rather a tough job. The welding was conducted by giving waviness to the torch and allowing the molten pool of Cu-Ni to flow towards the Al 5083 and thereby joining them without melting the aluminium. The microstructure was studied by welding plain plates as well as Nickel coated plates. The microstructural study showed that there is a good bonding between the two alloys. The SEM imaging confirms the bonding of the two alloys at the welded region. The elemental composition of the weld joint was found by EDS analysis. The formation of intermetallics was confirmed by XRD analysis. Then the hardness at the weld joint was studied. The hardness value obtained from testing was promising and there with showing a good properties at the welded joint. The Ni coated welded alloys showed significant and improved results when comparing with the non-nickel plated metal plates. With the hardness value varying from the non Ni coated plates was found to be high compared to the hardness value of the Al and Cu-Ni alloy. But the further study showed that that hardness value adds much to the weld stability by the formation of good bonds between the alloys and that of the intermetallics formed. The impact tests conducted on the welded specimen shows good results with regards to the comparison with the impact strength of 70Cu30Ni and the energy absorbed by the welded specimen. The results showed that welding is possible between these alloys and the nickel coated alloys shows better results in strength and bonding than non- nickel coated alloys. This study also confirms that GTAW can be very effective in joining these dissimilar alloys.

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Pulse electrodeposition of adherent nickel coatings onto anodized aluminium surfaces

Cited by 19 publications

References 29 publications

Nonaqueous Sol–Gel Synthesis of Anatase Nanoparticles and Their Electrophoretic Deposition in Porous Alumina

Nonaqueous Sol–Gel Synthesis of Anatase Nanoparticles and Their Electrophoretic Deposition in Porous Alumina

Small-diameter magnetic and metallic nanowire arrays grown in anodic porous alumina templates anodized in selenic acid

Evaluation of Weld Joint: Cupro – Nickel with Aluminium 5083

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