Mechanical properties of WC/Co-CNT HVOF sprayed coatings

Staia, M.H.; Mejias, Alberto; Barbera-Sosa, J.G. La; Puchi-Cabrera, E.S.; Villalobos-Gutiérrez, C.; Santana, Y.Y.; Montagne, Alex; Iost, Alain; Rodrı́guez, M.

doi:10.1080/02670844.2018.1529285

Cited by 9 publications

(11 citation statements)

References 29 publications

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“…Thus, the coatings identified as WC AS-RECEIVED (Figure 3a), WC CONV (Figure 3b), and WC CNT (Figure 3c) were observed to have porosities of ~3.3 ± 0.4%, 2.3 ± 0.3%, and 1.3 ± 0.3%, respectively. It is worth highlighting the effect of the milling process on the decrease in the coating porosity, which can be clearly observed by comparing the WC AS-RECEIVED coating (not milled feedstock) with the other two (WC CONV and WC CNT coatings subjected to the milling process), in agreement with the results reported elsewhere [17,18]. Figure 3 shows SEM micrographs, in secondary electrons mode, of the polished cross-section of the HVOF-sprayed coating samples, deposited from WC-Co feeding powders.…”

Section: Feedstock Powder and Microstructure Characterizationsupporting

confidence: 89%

“…Subsequent work, conducted by Santana et al [17], allowed the characterization of the wear performance of the same coatings by means of a ball-on-disc tribometer. More recently, Staia et al [18] have assessed different mechanical properties of both unreinforced and reinforced WC-Co coated systems, including elastic moduli, apparent yield stress, and fracture toughness, to explain the improved tribological performance of the reinforced coatings.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the research works cited above [16][17][18], the present investigation has been conducted in order to evaluate the tribocorrosion performance of a WC-12Co coating reinforced with MWCNTs, deposited by means of an HVOF process, and to compare it with that of the unreinforced coating, deposited under similar process conditions, with analogous feedstock powders, in terms of phase composition and porosity. To the best of our knowledge, the tribocorrosion performance of this type of reinforced metal matrix composites has not been addressed in the current literature.…”

Section: Introductionmentioning

confidence: 99%

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Tribocorrosion Performance of WC-12Co HVOF-Sprayed Coatings Reinforced with Carbon Nanotubes

et al. 2023

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WC-12Co HVOF-sprayed coatings (~400 µm in thickness) reinforced with multiwalled carbon nanotubes (MWCNTs), were deposited on a steel substrate. The aim of this work is to provide and analyze data from HVOF WC-12Co sprayed coatings, concerning the influence of the addition of MWCNTs on their tribocorrosion performance, in a 3.5% NaCl electrolyte. Electrochemical data (current density and corrosion potential from potentiodynamic polarization curves) and wear data (coefficients of friction, coating volume losses and wear constants) are reported for the coatings, with and without the addition of MWCNTs (labeled WCCNT and WCAS-RECEIVED, respectively), considering the synergistic effects of wear and corrosion coupling. Scanning electron microscopy (SEM) and profilometry are used to explain both the wear and corrosion mechanisms that account for each coating’s performance in this environment. During the tribocorrosion tests, similar wear constants, of the order of approximately 10−12 m3/Nm, were found for all samples, with an increase of ~20% due to the MWCNTs presence. However, for the coatings reinforced with MWCNTs, a remarkable increase in icorr, representing almost 3 times the icorr of the WCAS-RECEIVED coating, was determined. The above results illustrate the complex mechanisms that occur when these coatings are tested under tribocorrosion conditions, which give rise to concurrent interacting phenomena, involving both electrochemical and mechanical responses.

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Section: Feedstock Powder and Microstructure Characterizationsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tribocorrosion Performance of WC-12Co HVOF-Sprayed Coatings Reinforced with Carbon Nanotubes

et al. 2023

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“…In the plasma spray welding technique, suitable alloy powders are selected according to the actual conditions and requirements of surface properties [14][15][16]. A spray welding layer of cobalt-based alloy has an excellent high temperature impact wear resistance and outstanding high temperature oxidative stability [17,18].…”

Section: Introductionmentioning

confidence: 99%

Microscopic Characteristics and Properties of Fe-Based Amorphous Alloy Compound Reinforced WC-Co-Based Coating via Plasma Spray Welding

Wang

et al. 2020

Processes

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Plasma spray welding, as one of the material surface strengthening techniques, has the advantages of low alloy material consumption, high mechanical properties and good coating compactness. Here, the Co alloy, WC and Fe-based amorphous alloy composite coating is prepared by the plasma spray welding method, and the coating characteristics are investigated. The results indicate that the coatings have a full metallurgical bond in the coating/substrate interface, and the powder composition influences the microstructures and properties of the coating. The hardness of coatings increases with the mass fraction of the Fe-based amorphous alloy. The spray welding layer has a much higher wear resistance compared with the carbon steel, and the Fe-20 exhibits a superior wear resistance when compared to others. The results indicate that the amorphous alloy powders are an effective additive to prepare the coating by plasma spray welding for improving the wear resistance of the coating.

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“…The polyaniline group of conducting polymeric materials has received ample attention because of its simple method of preparation and their electrical, electrochemical and optical properties. Furthermore, the poly (diphenylamine) (PDPA) is found to be a suitable material for the composite material preparation due to their characteristic properties different from polyaniline (PANI) [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Characterisation of Novel Hybrid Copper / Poly (diphenylamine) (PDPA) Nanocomposites

2019

IJRTE

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The Poly (diphenylamine) (PDPA) nanoparticles was synthesized by surfactant assisted dilute polymerization method and characterized by UV-Visible, FTIR and Cyclic Voltammetry techniques. The PDPA nanoparticles were then suspended in an acidified copper sulphate electrolytic bath to prepare Cu-PDPA nanocomposites by simple electrodeposition technique. The XRD analysis revealed that the crystallite structure of Cu-PDPA nanocomposites and pure copper coatings was crystalline fcc and the grain size was 32 nm for pure Cu and 27 nm for Cu-PDPA nanocomposites. This decrease in crystallite size of Cu-PDPA nanocomposites shows the inclusion of PDPA nanoparticles was uniformly distributed throughout the copper matrix. The microstructure of the Cu-PDPA nanocomposites was examined by SEM analysis shows cauliflower like crystallites with layer by layer outward growth compared to electrodeposited pure copper coatings. The Electrochemical AC impedance and Tafel polarization studies were performed for electrodeposited copper and Cu-PDPA nanocomposites in 3.5% NaCl solution. It revealed that the Cu-PDPA nanocomposite coatings were found to be more corrosion resistance than electrodeposited pure copper coating.

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Mechanical properties of WC/Co-CNT HVOF sprayed coatings

Cited by 9 publications

References 29 publications

Tribocorrosion Performance of WC-12Co HVOF-Sprayed Coatings Reinforced with Carbon Nanotubes

Tribocorrosion Performance of WC-12Co HVOF-Sprayed Coatings Reinforced with Carbon Nanotubes

Microscopic Characteristics and Properties of Fe-Based Amorphous Alloy Compound Reinforced WC-Co-Based Coating via Plasma Spray Welding

Synthesis and Electrochemical Characterisation of Novel Hybrid Copper / Poly (diphenylamine) (PDPA) Nanocomposites

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