Preparation of nanostructured Ni/Al2O3 composite coatings in high magnetic field

Feng, Qi; Li, Tingju; Zhang, Zhong-Tao; Zhang, Jian; Liu, Mei; Jun-ze, Jin

doi:10.1016/j.surfcoat.2006.11.019

Cited by 59 publications

(35 citation statements)

References 16 publications

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“…Pure nickel films have been widely employed for their corrosion resistance [7,8], this property can be combined with the mechanical properties of alumina to produce Ni-Al 2 O 3 composite films exhibiting enhanced hardness [6, and wear resistance [9,13,16,22,25,26,[28][29][30][31] whilst maintaining the corrosion resistance of nickel [ [18], 321, [33,34]]. Whilst there is a considerable amount of literature available on this composite material a systematic investigation of the main deposition parameters has not been considered in detail.…”

Section: Introductionmentioning

confidence: 99%

Electro co-deposition of Ni–Al2O3 composite coatings

et al. 2012

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Nickel-Al 2 O 3 composite coatings have been successfully deposited galvanostatically on to stainless steel substrates by electro co-deposition from a Watts bath containing between 50 and 150 g/l of sub-micron or nanosized alumina particles applying current density of -10, -20 and -32 mA cm -2 . The alumina distribution in the composite films on the two sides of the substrate was remarkably different due to solution hydrodynamics and electric field effects. The effect of current density, particle concentration in the bath and particle size are studied systematically producing a comprehensive set of data for better understanding the effects of these variables on the amount of particles co-deposited. The amount of Al 2 O 3 co-deposited in the films increases with the particle concentration in the bath and strongly depends on the current density and on particle size. The effect of the current density and of the alumina inclusions on the crystallinity of the Ni matrix and on the Ni crystallites grain size has also been studied. The inclusions of nano or sub-micron-Al 2 O 3 particles are found to strongly influence the metallic nickel microstructure.

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Section: Introductionmentioning

confidence: 99%

Electro co-deposition of Ni–Al2O3 composite coatings

et al. 2012

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“…Improved microhardness and wear resistance for Ni-Al 2 O 3 and Ni-SiC composite coatings have been reported by Wang and Wei [17]. Feng et al [18] have observed an improved wear resistance for nanostructured Ni/Al 2 O 3 composite coatings deposited under the influence of an external high magnetic field (8T). Most of the reported literature have discussed the synthesis and properties of Ni-Al 2 O 3 composite coatings containing mostly a-alumina particles.…”

Section: Introductionmentioning

confidence: 77%

Corrosion- and wear-resistant properties of Ni–Al2O3 composite coatings containing various forms of alumina

et al. 2011

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This article describes the effect of the addition of different phases of alumina particles on the properties of electrodeposited Ni-Al 2 O 3 composite coatings. The corrosion-and wear-resistant properties of Ni-Al 2 O 3 composite coatings electrodeposited from a nickel sulfamate bath containing (i) alpha-alumina particles (Ni-Al 2 O 3 -1), (ii) gamma-alumina particles (Ni-Al 2 O 3 -2), and (iii) mixture of alpha, gamma, and delta alumina particles (Ni-Al 2 O 3 -3) have been studied. The potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) studies showed superior corrosion resistance of Ni-Al 2 O 3 -2 composite coatings compared with other two coatings. The SEM images and EDAX spectra also corroborated well with the observed corrosion results. The pin-on-disk wear studies showed improved wear resistance of Ni-Al 2 O 3 -1 composite coating containing alpha alumina compared with other two coatings. The transfer of material from the pin onto the disk was evident from the optical microscopy images of the wear tracks and Raman spectra of the wear track. This study shows that the addition of pure gamma-alumina particles enhances the corrosion resistance, and that pure alphaalumina particles enhance the wear resistance of Ni composite coatings to a greater extent.

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“…Many techniques [1][2][3][4][5] can be used to produce highly uniform composite films, with good reproducibility, high adhesion, high deposition rate, low roughness and low cost 1,[6][7][8] . Electrochemical co-deposition, also known as electro co-deposition, the most used technique to produce these coatings.…”

Section: Introductionmentioning

confidence: 99%

“…The process of producing composite films is more complex than that used in the electrodeposition of alloys, since the particles of ceramic material to be embedded in the metallic matrix should be kept in suspension during the deposition process 7,20,24 . This feature requires that the electro co-deposition process should always occur under stirred conditions to prevent the precipitation of the particles 1,3,7,23 . In general, if the stirring speed is slow, it prevents the dispersion of the particles, allowing their aggregation and precipitation.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Composite Coatings of Cu/AlO(OH) Using Allyl Alcohol as an Additive

et al. 2017

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In this work, composite coatings of Cu/AlO(OH) were produced by electrodeposition on steel substrates using a pyrophosphate-based bath containing allyl alcohol as an additive. The electrodeposition of the composite coatings was carried out using a 2³ central composite design (CCD), aiming to verify the effects of the deposition parameters (previous stirring time (t), the stirring speed (S) and the current density (j)), considered the entry variables, on the electrochemical behavior of Cu/AlO(OH) coating, the response variables of the CCD. The results indicated that a decrease of the parameters j and S directly influenced the values of R p and R ct , leading to the production of protective coatings. The best result (R p = 211 Ω and R ct = 221 Ω) was obtained under conditions where t = 120 min, S = 1300 rpm and j = 7 A m -2 . Dispersed bohemite particles could be noted on the surface of the composite coating.

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Preparation of nanostructured Ni/Al2O3 composite coatings in high magnetic field

Cited by 59 publications

References 16 publications

Electro co-deposition of Ni–Al2O3 composite coatings

Electro co-deposition of Ni–Al2O3 composite coatings

Corrosion- and wear-resistant properties of Ni–Al2O3 composite coatings containing various forms of alumina

Electrodeposition of Composite Coatings of Cu/AlO(OH) Using Allyl Alcohol as an Additive

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