Electrodeposition of particle-strengthened nickel films

Ferkel, H.; Müller, Bernd W.; Riehemann, W.

doi:10.1016/s0921-5093(97)00266-9

Cited by 84 publications

(38 citation statements)

References 5 publications

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“…The higher microhardness of Ni-particles composites has been observed for almost all kinds of incorporated hard particles, such as SiC [2], Si 3 N 4 [28], Al 2 O 3 [29], and even for soft particles such as Al [14] and polyethylene [10]. There are three reasons for this increase in hardness: particle-strengthening [2,28], dispersion-strengthening [2,10,29] and grain refining [10,14].…”

Section: Microhardnessmentioning

confidence: 99%

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Deposition and characterization of nickel–niobium composite electrocoatings

Robin

Fratari

2007

J Appl Electrochem

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Ni-Nb composite electrocoatings were obtained on carbon steel from Watts bath, containing suspended 20 lm size niobium powders. The effect of cathodic current density, electrolyte stirring rate and concentration of Nb particles in the bath on the deposit morphology and texture, volume fraction of co-deposited Nb particles and microhardness was investigated. The Ni-Nb composite layers presented a rough morphology with randomly oriented Ni grains, whereas pure Ni coatings obtained under the same experimental conditions were smooth and showed highly preferred orientation in the [110] or [100] direction. Stirring rate of the electrolyte and concentration of Nb particles in the bath are the main parameters affecting the incorporation of Nb particles. The Nb incorporated volume fraction was 11-14%, 17-19%, 27-32% and 34-37% for the 20 g L -1 Nb/550 rpm, 20 g L -1 Nb/400 rpm, 40 g L -1 Nb/400 rpm and 40 g L -1 Nb/550 rpm conditions, respectively. The microhardness of the Ni-Nb composite coatings obtained at 20 and 40 mA cm -2 was higher than that of pure Ni layers, due to grain refining. Incorporation of Nb particles in Ni coatings improved the corrosion resistance of the deposits in NaCl and H 2 SO 4 solutions.

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Section: Microhardnessmentioning

confidence: 99%

“…There are three reasons for this increase in hardness: particle-strengthening [2,28], dispersion-strengthening [2,10,29] and grain refining [10,14]. Particle-strengthening is related to the incorporation of hard particles and volume fraction above 20%.…”

Section: Microhardnessmentioning

confidence: 99%

Deposition and characterization of nickel–niobium composite electrocoatings

Robin

Fratari

2007

J Appl Electrochem

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“…The embedded particles can be selected to fulfil specific mechanical, electrical, piezoelectrical or magnetic properties in thin coatings. Ceramic particles, in particular, can lead to a tremendous increase in hardness in metallic materials [49,50].…”

Section: Embedded Particlesmentioning

confidence: 99%

“…The electrodeposition of Al 2 O 3 particle-strengthened nickel films was carried out by Ferkel et al [49] using galvanostatic deposition in a stirred Watts bath, with pH values from 2.5 to 4.5. The nickel films deposited on copper substrates were analysed by light and transmission electron microscopy and by energy dispersive X-ray (EDX) microanalysis.…”

Section: Embedded Particlesmentioning

confidence: 99%

Recent developments in the electrodeposition of nickel and some nickel-based alloys

Oriňáková¹,

Turoňová²,

Kladeková³

et al. 2006

J Appl Electrochem

223

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The numerous theoretical and practical studies of the electrodeposition of nickel and its binary and selected ternary alloys with copper and cobalt over the last 10-15 years are reviewed. The reported mechanisms of the electrodeposition processes and accompanying evolution of hydrogen are considered. The complex influence of different bath compositions, pHs, current densities or potential ranges and temperature on the formation of single or multiple deposition layers are compared. The determination of the structure and morphology of the deposits on different substrates, including solid surfaces and particulate materials, using a range of analytical techniques are reported.

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“…The effect of the current density on the hardness of a codeposited Ni-Ti composite coatings processed in the plating bath with particle loading of 8 g/dm 3 According to R.Q. Fratari and A. Robin [21], the effects of reinforced particles on the hardness of the coating maybe explained through three possible mechanisms: (1) the particle strengthening [22][23], (2) dispersion strengthening [22,24], and (3) grain refining [25][26]. First, the particle strengthening mechanism is achieved when hard and large particles (>1 µm), present at a volume fraction above 20% in the composite coating, share the load with the metal matrix and thus hinder matrix deformation.…”

Section: Phase Analysis Of the Codeposited Ni-ti Coatingsmentioning

confidence: 99%

Morphology and Hardness of Electrochemically-Codeposited Ti-Dispersed Ni-Matrix Composite Coatings/ Morfologia I Twardość Elektrochemicznie Współosadzonych Powłok Kompozytowych Ni-Ti

Srikomol

Janetaisong

Boonyongmaneerat

et al. 2014

Archives of Metallurgy and Materials

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The effects of current density and Ti particle loading in a plating bath on the morphology and hardness of Ni-Ti composite coatings via an electrochemical-codeposition process were investigated. The Ti-reinforced Ni-matrix composite coatings were codeposited on copper substrates using a Ni-ion electrolytic solution stably suspended with -45 micron Ti particles. Within the current studied range, the coatings' Ti contents are in the range between 46 and 62 at.%. The morphology appeared to vary with current density. Structures of the Ni-Ti composite coatings produced under low current density conditions revealed denser structures, which is in contrast to the more porous structures noted in the coatings produced under high current density. An initial increase of current density from 100 to 150 mA/cm 2 also tends to raise Ti coating content. The reinforcement of Ti particles in the coatings also increased their hardness, which is attributed to the possible role of the embedded Ti particles in hindering matrix deformation. The effect of Ti loading on the coating's Ti contents was not significant under conditions used in the present study.Keywords: electrochemical codeposition, composite coatings, Nickel-Titanium, morphology, hardness Badano wpływ gęstości prądu i zawartości cząstek Ti w kąpieli galwanicznej na morfologię i twardość elektrochemicznie współosadzanych powłok kompozytowych Ni-Ti. Kompozytowe powłoki niklowe zbrojone cząstkami Ti zostały współosadzone na powierzchniach miedzianych z kąpieli elektrolitycznej zawierającej jony Ni i 45 mikronowe cząstki Ti tworzące stabilną zawiesinę. Zawartość Ti wbudowanego w powłoki wahała się w granicach 46-62 at.%. Morfologia powłok zmienia się wraz ze zmianą stosowanej gęstości prądu. W przypadku kompozytowych powłok Ni-Ti wytwarzanych przy niskich gęstościach prądu stwierdzono bardziej zwarte struktury, w przeciwieństwie do bardziej porowatych struktur stwierdzonych w przypadku powłok wytwarzanych przy wysokich gęstościach prądu. Początkowy wzrost gęstości prądu od 100 do 150 mA/cm 2 również powoduje podniesienie zawartości Ti w powłokach. Ze wzrostem zawartości Ti wzrasta również twardość powłoki, co można przypisać roli osadzonych cząstek Ti utrudniających odkształcenie osnowy. W warunkach stosowanych w tej pracy wpływ zawartości Ti w kąpieli na zawartość Ti w powłokach nie był znaczący.

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Electrodeposition of particle-strengthened nickel films

Cited by 84 publications

References 5 publications

Deposition and characterization of nickel–niobium composite electrocoatings

Deposition and characterization of nickel–niobium composite electrocoatings

Recent developments in the electrodeposition of nickel and some nickel-based alloys

Morphology and Hardness of Electrochemically-Codeposited Ti-Dispersed Ni-Matrix Composite Coatings/ Morfologia I Twardość Elektrochemicznie Współosadzonych Powłok Kompozytowych Ni-Ti

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