Friction and sliding wear behaviour of electrodeposited cobalt and cobalt–tungsten alloy coatings for replacement of electrodeposited chromium

Weston, David; Shipway, P.H.; Harris, S.J.; Cheng, Miao

doi:10.1016/j.wear.2009.01.006

Cited by 116 publications

(38 citation statements)

References 22 publications

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“…The composition of the Co-W alloy/MWCNT composite plating bath used in the present study was 0.09 mol dm 3 was employed for the electrodeposition. The volume of the plating bath was 300 cm 3 .…”

Section: Methodsmentioning

confidence: 99%

Fabrication of Co-W Alloy/Multiwalled Carbon Nanotube Composite Films by Electrodeposition for Improved Frictional Properties

Arai

Miyagawa

2013

ECS J. Solid State Sci. Technol.

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Co-W alloy/multiwalled carbon nanotube (MWCNT) composite films were fabricated using an electrodeposition technique and their microstructures were characterized. A citrate bath was used as the Co-W alloy/MWCNT composite plating bath. A compact Co-W alloy/MWCNT composite film having uniform distribution of MWCNTs without cracks was electrodeposited by adjusting the pH and current density. Frictional properties of the Co-W alloy/MWCNT composite film were evaluated using a ball-on-disk method at room temperature as well as at elevated temperatures (∼ 300 • C) without any lubricant. The coefficient of friction of the Co-W alloy/MWCNT composite film was clearly lower than that of a Co-W alloy film with the same tungsten content at room temperature. The coefficient of friction of the Co-W alloy/MWCNT composite film increased with increasing temperature. However, the coefficient of friction of the Co-W alloy/MWCNT composite film was lower than that of a Co-W alloy film with the same tungsten content at elevated temperatures. © 2013 The Electrochemical Society. [DOI: 10.1149/2.036311jss] All rights reserved.Manuscript submitted August 26, 2013; revised manuscript received September 20, 2013. Published September 25, 2013 Due to their high hardness, wear resistance, 1 and high corrosion resistance, 2,3 Co-W alloy plating films are expected to be a substitute for chromium plating films, which are formed in an environmentally hazardous process using hexavalent chromium. Due to their superior mechanical properties, very high thermal conductivity, and excellent solid lubricity, carbon nanotubes (CNT) 33,34 are expected to be used as fillers for functional composite materials. Consequently, the formation of metal/CNT composites has been studied by various methods including plating techniques for various applications. Fabrication of metal/CNT composite films for use in tribological applications has also been extensively researched using electrodeposition [35][36][37] and electroless deposition. [38][39][40] These studies demonstrated that metal/CNT composite films show lower apparent coefficients of friction compared to simple metal films without CNTs at room temperature.Co-W alloy/CNT composite films are thus a potential candidate to replace chromium plating films. However, there have been no reports on Co-W alloy/CNT composite films so far. In this study, Co-W alloy/CNT composite films were fabricated using an electrodeposition technique. The tribological properties of the Co-W alloy/MWCNT composite film were evaluated at room temperature as well as at high temperatures. ExperimentalThe CNTs used in the present study are commercially available vapor-grown MWCNTs (Showa Denko Co. Ltd.), formed via catalyst-assisted CVD 41 and heat treated at 2800 Na 3 C 6 H 5 O 7 · 2H 2 O) was used as the base alloy bath. 42 The MWCNTs did not disperse uniformly in the base bath; therefore, a homogeneous dispersion of MWCNTs was achieved by the addition of a polyacrylic acid (mean molecular weight 5000; PA5000) dispersant [43][44][45] to the b...

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Section: Methodsmentioning

confidence: 99%

Fabrication of Co-W Alloy/Multiwalled Carbon Nanotube Composite Films by Electrodeposition for Improved Frictional Properties

Arai

Miyagawa

2013

ECS J. Solid State Sci. Technol.

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“…At higher applied loads the hardness of Fe-W and Co-W alloys can decrease, e. g. for Fe-24 at.% W deposits decreases up to 500 HV 980 [19], and for Co-13 at.% W -up to 600 HV 980 [24]. Overall, it should be noted that the electrodeposited binary tungsten alloy coatings are harder than those prepared from pure iron group metals [14,25].…”

Section: Tribological Propertiesmentioning

confidence: 99%

Evaluation of Corrosion and Tribological Behavior of Electrodeposited Tungsten Alloys

Vernickaite

Cesiulis

Цынцару

2017

Proccedings of International Scientific Conference "BALTTRIB 2017"

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Tungsten alloy coatings with iron group metals (Ni, Fe, Co) are considered as advanced materials for various surface engineering applications. Such coatings should be resistant to mechanical and corrosive damage, and to have improved functionality and durability. Accordingly, the objectives of this review consist in a comparative study of available literature on corrosive and wear behavior of electrodeposited tungsten alloys with iron group metals, including our recent results on evaluation of electrodeposited Co-W coatings. The wear and corrosion resistance of Ni-W, Fe-W and Co-W strongly depends on the chosen deposition conditions and subsequently on tungsten content and structure of obtained protective coatings.

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“…Electrodeposited Co-W binary alloys have a number of properties that extend the possibilities of their application: high microhardness (up to 1000 HV) and wear resistance, low friction coefficient, ability to control magnetic properties, good corrosion resistance and catalytic properties [1][2][3][4][5][6][7][8][9]. That is why some researchers recommend such coatings as an alternative to electrolytic chromium coatings [1,4,9].…”

Section: Introductionmentioning

confidence: 99%

“…That is why some researchers recommend such coatings as an alternative to electrolytic chromium coatings [1,4,9]. A high number of papers are devoted to the deposition of such coatings, but there is still not determined concept of the deposition mechanism, which is affecting the advanced properties of these alloys [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…A high number of papers are devoted to the deposition of such coatings, but there is still not determined concept of the deposition mechanism, which is affecting the advanced properties of these alloys [10][11][12]. Nanocrystalline Co-W coatings with advanced properties can be obtained by codeposition from different electrolytes, including from boron-gluconate bath [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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THE INFLUENCE OF GLUCONATE BATH PARAMETERS ON THE RATE OF ELECTRODEPOSITION AND MECHANICAL PROPERTIES OF Co–W COATINGS

Белевский

Bobanova

Buravets

et al. 2017

Proccedings of International Scientific Conference "BALTTRIB 2017"

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The given study overview the results obtained for Co-W alloys electrodeposited from gluconate bath. Namely, the influence of different parameters (the concentration of the bath components, pH, temperature, cathodic current density, volume current density, hydrodynamic conditions, insoluble and soluble anodes) on the rate of electrodeposition and microhardness of the coatings has been investigated. The given research determine the conditions ensuring high deposition rate, microhardness and bath efficiency. It was shown, that the deposition rate, tungsten content and microhardness reach the maximum values at pH 6.5, regardless on the concentration of bath components. Also, it was detected the macroscopic size effect of microhardness, which is linked to the fact that for a fixed cathodic current density microhardness depends on volume current density. In addition, different anodes (Pt, graphite, W and Co-W) were investigated to reveal the anode influence on reaching the maximum values of the current efficiency and microhardness.

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Friction and sliding wear behaviour of electrodeposited cobalt and cobalt–tungsten alloy coatings for replacement of electrodeposited chromium

Cited by 116 publications

References 22 publications

Fabrication of Co-W Alloy/Multiwalled Carbon Nanotube Composite Films by Electrodeposition for Improved Frictional Properties

Fabrication of Co-W Alloy/Multiwalled Carbon Nanotube Composite Films by Electrodeposition for Improved Frictional Properties

Evaluation of Corrosion and Tribological Behavior of Electrodeposited Tungsten Alloys

THE INFLUENCE OF GLUCONATE BATH PARAMETERS ON THE RATE OF ELECTRODEPOSITION AND MECHANICAL PROPERTIES OF Co–W COATINGS

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