Mechanical properties and load bearing capability of nanocrystalline nickel-tungsten multilayered coatings

Allahyarzadeh, M.H.; Mahmood, Asif; Rouhaghdam, A. Sabour; Alimadadi, Hossein; Torabinejad, V.

doi:10.1016/j.surfcoat.2020.125472

Cited by 47 publications

(9 citation statements)

References 58 publications

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“…e graph shows that coatings with a crystallite size of 50 nm in the Ni matrix and 67 nm in the WC/Co matrix reach a maximum value of the microhardness. Additionally, a noticeable decrease in microhardness is also recorded for crystallite values close to 10 nm, which is in accordance with the Hall-Petch theory which indicates that the yield stress and hence the hardness are related with the inverse square root of crystallite size [18,19]. Moreover, Sriraman et al [20] report 2 Advances in Tribology that refinement of the crystallite size of Ni W alloys results in an increase in the hardness of the material.…”

Section: Microhardnesssupporting

confidence: 75%

Tribological Behavior of Ni-Based WC-Co Coatings Deposited via Spray and Fuse Technique Varying the Oxygen Flow

Jiménez

Olaya

Alfonso

2021

Advances in Tribology

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The tribological behavior of Ni-based WC-Co coatings is analyzed. The coatings were deposited on gray cast iron substrates in a spray and fuse process using SuperJet Eutalloy deposition equipment, varying the oxygen flow conditions in the flame. The crystallographic structure of the coatings was characterized via the X-ray diffraction (XRD) technique. The microhardness was measured on the surface and in cross sections of the coatings by means of a Knoop microhardness tester. The topography and the morphological characteristics of the coatings and the tribo-surfaces were examined using scanning electron microscopy (SEM) and confocal microscopy, while the chemical composition was measured by means of energy-dispersive X-ray spectroscopy (EDS). The tribological behavior of the coatings was examined via a cohesion-adhesion scratch test, using cross sections of the coatings. Furthermore, two wear tests were carried out, using the pin-on-disk method under ASTM G99 standard and an ASTM standard G65 sand/rubber wheel abrasion wear test. The wear of the coatings showed a close relationship to the porosity in the metal matrix; since then, in the abrasive wear test, a high porosity is related with lower hardness in the coatings; likewise, a low hardness is related with a high wear.

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Section: Microhardnesssupporting

confidence: 75%

Tribological Behavior of Ni-Based WC-Co Coatings Deposited via Spray and Fuse Technique Varying the Oxygen Flow

Jiménez

Olaya

Alfonso

2021

Advances in Tribology

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“…It is noteworthy that the presence of COF fluctuation can be categorized among vast and brief domains. These instabilities could be ascribed to the ejection and accretion of the wear debris. ,− On the contrary, in the case of Ni-P-ZrC, a smooth and constant COF was observed after 200 s of friction time, which could be attributed to the lubrication influence of the nanospecies.…”

Section: Results and Discussionmentioning

confidence: 98%

Investigating the Properties of Electrodeposited of Ni-P-ZrC Nanocomposite Coatings

et al. 2021

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Superior corrosion resistance along with higher mechanical performance is becoming a primary requirement to decrease operational costs in the industries. Nickel-based phosphorus coatings have been reported to show better corrosion resistance properties but suffer from a lack of mechanical strength. Zirconium carbide nanoparticles (ZCNPs) are known for promising hardness and unreactive behavior among variously reported reinforcements. The present study focuses on the synthesis and characterization of novel Ni-P-ZrC nanocomposite coatings developed through the electrodeposition technique. Successful coelectrodeposition of ZCNPs without any observable defects was carried out utilizing a modified Watts bath and optimized conditions. For a clear comparison, structural, surface, mechanical, and electrochemical behaviors of Ni-P and Ni-P-ZrC nanocomposite coatings containing 0.75 g/L ZCNPs were thoroughly investigated. The addition of ZCNPs has a considerable impact on the properties of Ni-P coatings. Enhancement in the mechanical properties (microhardness, nanoindentation, wear, and erosion) is observed due to reinforcement of ZCNPs in the Ni-P matrix, which can be attributed to mainly the dispersion hardening effect. Furthermore, corrosion protection efficiency (PE%) of the Ni-P matrix was enhanced by the incorporation of ZCNPs from 71 to 85.4%. The Ni-P-ZrC nanocomposite coatings provide an exciting option for their utilization in the automotive, electronics, aerospace, oil, and gas industry.

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“…Moreover, as can be seen from 3(b) is that the increase in PTFE concentration results in a more stable coefficient of friction of composite pavements at sliding distance. Allahyarzadeh et al [31] reported that when there is plastic deformation, the matrix can carry the load and decreases stresses. According to this information, the increase in the load-carrying ratio of the co-deposition fabricated with 15 g/L PTFE incorporated to the solution compared to other samples can be due to the increase in the PTFE concentration [20,29,32,33].…”

Section: Resultsmentioning

confidence: 99%

Tribological performance of Ni-W/PTFE composite coating via pulse electrodeposition

et al. 2022

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The Ni-W/PTFE co-depositions were successfully prepared on steel via pulse electrodeposition methods. Electrodeposition was perform by dispersing 5-20 g/L PTFE particles from Ni-Watt bath. The surface morphology, phase analyses crstalytallite size, distorsion and hardness of the samples were characterized by SEM, XRD, and Vicker?s microhardness tester. The friction coefficient of the coatings were carried out using CSM microtester. As increasing with the concentration of the PTFE in the solution, the wear resistance properties of theco-depositions were increased. These experimental results determined that the PTFE concentration of 15 g/L in the electrolyte was the optimum content to obtain the best micro-structure and wear performance.

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Mechanical properties and load bearing capability of nanocrystalline nickel-tungsten multilayered coatings

Cited by 47 publications

References 58 publications

Tribological Behavior of Ni-Based WC-Co Coatings Deposited via Spray and Fuse Technique Varying the Oxygen Flow

Tribological Behavior of Ni-Based WC-Co Coatings Deposited via Spray and Fuse Technique Varying the Oxygen Flow

Investigating the Properties of Electrodeposited of Ni-P-ZrC Nanocomposite Coatings

Tribological performance of Ni-W/PTFE composite coating via pulse electrodeposition

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