Strengthening Mechanisms in Multiwalled Carbon Nanotubes Reinforced Co–W Pulse Electrodeposited Coatings

Anand, E. Edward; Natarajan, S.

doi:10.1080/10426914.2015.1004697

Cited by 8 publications

(4 citation statements)

References 28 publications

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“…This steep surge in Ni-Al 2 O 3 /ZrO 2 nano composite hardness is associated to the Hall-petch phenomenon and simultaneous strengthening due to dispersion, along with the formation of nucleation sites along the substrates. The surge in hardness follows a mechanism of obstructing the movement of dislocations, which is aided by the fine grain sizes of the nano composite coated material on HSLA ASTM A860 alloy [34]. The phenomenon of dispersion along with the surge in nucleation sites in Ni-Al 2 O 3 /ZrO 2 nano composite coating ensures the increase in microhardness.…”

Section: Effect Of Hardness Due To Nano Composite Coatingmentioning

confidence: 99%

Experimental investigation of electrodeposited Ni-Al₂O₃/ZrO₂ nano composite on HSLA ASTM A860 alloy

C¹,

Pradeep²,

Shaik³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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Nano composite coatings on HSLA ASTM A860 alloy, adds to the barrier efficacy by increase in the microhardness, wear and corrosion resistance of the substrate material. Additionally, reduction of delamination of the nano composite coating sample is ascertained. Ball milling is availed to curtail the coating samples (Al2O3/ZrO2) to nano size, for forming a electrodeposited product on the substrate layer. The curtailment in grain size was ascertained to be 17.62% in Ni-Al2O3/ZrO2 nano composite coating. During the deposition process, due to the presence of Al2O3/ZrO2 nano particles an increase in cathode efficiency is ascertained. An XRD analysis of the nano composite coating indicates a curtailment in grain size along with increase in the nucleation sites causing a surge in the growth of nano coating layer. In correlation to uncoated HSLA ASTM A36 alloy sample, a surge in compressive residual stress by 47.14%, reduction of waviness by 32.14% (AFM analysis), upsurge in microhardness by 67.77% is ascertained in Ni-Al2O3/ZrO2 nano composite coating. Furthermore, in nano coated Ni-Al2O3/ZrO2 composite a reduction is observed pertaining to weight loss and friction coefficients by 27.44% and 13% in correlation to plain uncoated alloy respectively. A morphology analysis after nano coating indicates, Ni-Al2O3/ZrO2 particles occupy the areas of micro holes, reducing the wide gaps and crevice points inside the matrix of the substrate, enacting as a physical barrier to upsurge the corrosion resistance by 67.72% in correlation to HSLA ASTM A860 base alloy.

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Section: Effect Of Hardness Due To Nano Composite Coatingmentioning

confidence: 99%

Experimental investigation of electrodeposited Ni-Al₂O₃/ZrO₂ nano composite on HSLA ASTM A860 alloy

C¹,

Pradeep²,

Shaik³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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“…This eventually results in the increase of the yield stress causing a resistance to plastic flow and improved hardness. 13 Wear characteristics Co and CoG nanocomposite coatings respectively. CoG (0.45 wt%) nanocomposite coating exhibits the lowest wear rate in all load conditions.…”

Section: Xrd Analysismentioning

confidence: 99%

“…8 Adding graphene into the existing metallic coatings will greatly influence the microstructure and morphology of the coatings, which in turn has proven to improve the corrosion resistance. [9][10][11][12][13][14] Moreover, graphene can act as a template for the growth of the metallic counterparts and greatly influence their grain size. 15 Reduction in the grain size is primary reason for the increased microhardness and corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of pulsed electrodeposited cobalt–graphene nanocomposite coatings

Raveen¹,

Yoganandh²,

SathieshKumar

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part L:

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Cobalt–graphene nanocomposite coatings possess unique mechanical and tribological properties which attract researchers to explore its potential for various industrial applications. This research work presents the investigation on cobalt–graphene nanocomposite coatings, with two different graphene compositions cobalt–graphene (0.15 and 0.45 wt%) prepared by pulsed electrodeposition from aqueous bath involving cobalt chloride, trisodium citrate, and citric acid on low carbon steel substrate. Studies on coating morphology, microhardness, tribological characteristics such as wear and corrosion for the cobalt–graphene nanocomposite coatings were reported. Cobalt–graphene (0.45 wt%) nanocomposite coating which exhibits low wear rate in all load conditions due to the self-lubricating property of graphene and cobalt–graphene (0.15 wt%) nanocomposite coating shows higher corrosion resistance due to its layered cauliflower surface morphology.

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“…The Co–Cr electrodeposits can be an economic alternative for these expensive alloys [2-4]. These coatings are also a suitable substitute for hard chromium films [3,5-8]. Conventional chromium coatings were electrodeposited from Cr(VI) based electrolytes, that are toxic and carcinogenic, and should be replaced [1,3,7-11].…”

Section: Introductionmentioning

confidence: 99%

Characteristics and properties of Co–Cr alloy coatings prepared by electrodeposition

Mahdavi

Allahkaram

Heidarzadeh

et al. 2019

Surface Engineering

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Two different ways were used for preparing the electrodeposition baths. In the first bath, different concentrations of cobalt sulphate (up to 6 g L -1 ) and one complexing agent were employed. In the second bath, two different complexing agents and a constant concentration of cobalt sulphate were used. The results showed that the microstructure of the coatings was changed from amorphous to nano-crystalline by enhancing cobalt sulphate concentration in the bath No. 1. Current efficiency and thickness of the alloy coatings obtained from bath No. 2 were higher than those deposited from bath No. 1. However, reducing the bath temperature or raising the current density decreased the current efficiency, while increased Cr content and hardness of alloy coatings. The Co-29.3 wt-%Cr electrodeposit obtained from bath No. 2 at the optimum condition had better corrosion and wear resistance than Co-Cr and Cr films produced from bath 1, as well as the steel substrate.

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Strengthening Mechanisms in Multiwalled Carbon Nanotubes Reinforced Co–W Pulse Electrodeposited Coatings

Cited by 8 publications

References 28 publications

Experimental investigation of electrodeposited Ni-Al₂O₃/ZrO₂ nano composite on HSLA ASTM A860 alloy

Experimental investigation of electrodeposited Ni-Al₂O₃/ZrO₂ nano composite on HSLA ASTM A860 alloy

Preparation and characterization of pulsed electrodeposited cobalt–graphene nanocomposite coatings

Characteristics and properties of Co–Cr alloy coatings prepared by electrodeposition

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Strengthening Mechanisms in Multiwalled Carbon Nanotubes Reinforced Co–W Pulse Electrodeposited Coatings

Cited by 8 publications

References 28 publications

Experimental investigation of electrodeposited Ni-Al2O3/ZrO2 nano composite on HSLA ASTM A860 alloy

Experimental investigation of electrodeposited Ni-Al2O3/ZrO2 nano composite on HSLA ASTM A860 alloy

Preparation and characterization of pulsed electrodeposited cobalt–graphene nanocomposite coatings

Characteristics and properties of Co–Cr alloy coatings prepared by electrodeposition

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Product

Resources

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Experimental investigation of electrodeposited Ni-Al₂O₃/ZrO₂ nano composite on HSLA ASTM A860 alloy

Experimental investigation of electrodeposited Ni-Al₂O₃/ZrO₂ nano composite on HSLA ASTM A860 alloy