Microstructure and electrochemical properties of FeNiCoCu medium entropy alloy-graphene oxide composite coatings

Aliyu, Ahmed; Srivastava, Chandan

doi:10.1016/j.jallcom.2021.158851

Cited by 15 publications

(4 citation statements)

References 20 publications

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“…VEC theory proposes that when the alloy VEC ≤ 6.87, it is a single‐phase BCC structure. When 6.87 ≤ VEC ≤ 8, the BCC and FCC structures exist simultaneously, when VEC≥8, it is a single‐phase FCC structure [28–32]. The results of the calculated VEC and g of CuCrWNi, CuCrWMo, and CuCrWAl are shown in Table I.…”

Section: Resultsmentioning

confidence: 99%

“…VEC theory proposes that when the alloy VEC ≤ 6.87, it is a single-phase BCC structure. When 6.87 ≤ VEC ≤ 8, the BCC and FCC structures exist simultaneously, when VEC≥8, it is a single-phase FCC structure [28][29][30][31][32]. The results of the calculated VEC and g of CuCrWNi, CuCrWMo, and CuCrWAl are shown in Table I all three alloys is less than 6.6, which meets the solid solution formation condition, and the VEC data follows the BCC structure criterion.…”

Section: Influence Of Different Elements On the Structure Of The Alloymentioning

confidence: 97%

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First‐Principles Calculations for the Enhancement of Mechanical Properties of High‐Entropy Alloys by Carbon Elements

Ding

Feng

Yuan

2023

IEEJ Transactions Elec Engng

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A series of alloy solid solution models were developed using the SQS modeling method, and the effect of C doping on the phase structure, elastic properties, and electronic structure of the alloys was investigated using a first‐principles approach. The results showed that the CuCrWNi (C), CuCrWMo (C), and CuCrWAl (C) alloys all have a single body‐centered cubic (BCC) structure. The alloys conformed to the mechanical stability criterion before and after incorporating C. The incorporation of C leads to an increase in the bulk modulus B of the CuCrWNi, CuCrWAl alloy, and the Young's modulus E and shear modulus G of the CuCrWMo, CuCrWAl alloy. In comparison, the shear modulus G and Young's modulus E of CuCrWNi alloy and the bulk modulus B of CuCrWMo alloy show a decreasing tendency. The alloy is ductile before and after the addition of C. The addition of C increased the Poisson's ratio, Pugh ratio, and Cauchy pressure of CuCrWNi alloy and decreased the Poisson's ratio, Pugh ratio, and Cauchy pressure of CuCrWMo and CuCrWAl. This shows that adding C improves the ductility of CuCrWNi and the strength of CuCrWMo and CuCrWAl alloys. By analyzing the electronic structure of the alloys, it was found that the doping of C made the alloy less stable. Adding C makes the high‐entropy alloys more conducive and the metallic properties more noticeable. Moreover, the incorporation of C makes the CuCrWNi pseudo‐energy gap decrease and the CuCrWMo, and CuCrWAl pseudo‐energy gap increase, which may be related to the change in the mechanical properties of the alloy. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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Section: Resultsmentioning

confidence: 99%

Section: Influence Of Different Elements On the Structure Of The Alloymentioning

confidence: 97%

First‐Principles Calculations for the Enhancement of Mechanical Properties of High‐Entropy Alloys by Carbon Elements

Ding

Feng

Yuan

2023

IEEJ Transactions Elec Engng

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“…Other metal or metal alloy matrices are of great interest for electrodeposited composite coatings with graphene, rGO, and GO additives [81,136,137]. Results showed that Zn-GO composite coatings have higher corrosion resistance compared to the pristine Zn coatings.…”

Section: Anti-corrosion Propertiesmentioning

confidence: 99%

Graphene derivatives reinforced metal matrix nanocomposite coatings: A review

et al. 2022

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Due to the extraordinary mechanical, thermal, and electrical properties of graphene, graphene oxide (GO), and reduced graphene oxide (rGO), these materials have the potential to become ideal nanofillers in the electrodeposited nanocomposite coatings. This article provides an overview of literature on the improvements of properties associated with graphene, GO, and rGO-reinforced coatings, along with the processing parameters and mechanisms that would lead to these improvements in electrodeposited metal matrix nanocomposite coatings, where those affected the microstructural, mechanical, tribological, and anti-corrosion characteristics of coatings. The challenges associated with the electroplating of nanocomposite coatings are addressed. The results of this survey indicated that adding graphene into the plating bath led to a finer crystalline size in the composite coating due to increasing the potential development of specific crystalline planes and the number of heterogeneous nucleation sites. This consequently caused an improvement in hardness and in tribological properties of the electrodeposited coating. In graphene reinforced metallic composites, the severe adhesive wear mechanism for pure metallic coatings was replaced by abrasive wear and slight adhesive wear, where the formation of a tribolayer at the contact surface increased the wear resistance and decreased friction coefficient. Furthermore, superhydrophobicity and smaller grain size resulted from embedding graphene in the coating. It also provided a smaller cathode/anode surface ratio against localized corrosion, which has been found to be the main anti-corrosion mechanism for graphene/metal coating. Lastly, the study offers a discussion of the areas of research that need further attention to make these high-performance nanocomposite coatings more suitable for industrial applications.

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“…However, electrodeposition of multi-elements in an aqueous bath is still challenging because of the tremendous difference between metal-ion reduction potentials [34], and the challenge in the fabrication of five or more element alloys with high quality from an aqueous electrolyte. Furthermore, the complexity of the electrolyte solution and the different combinations of deposition parameters also make it a difficult task to successfully deposit the MCA coatings, and the thickness of the MCA coatings is usually around a few microns [43,44]. In addition, there are a limited number of studies on electrodeposited MCAs, compared to traditional fabrication methods [45,46], and it is widely believed that the current intensity would greatly affect the microstructures and properties of electro-deposited coatings.…”

Section: Introductionmentioning

confidence: 99%

Effect of Additive and Current Density on Microstructures and Corrosion Behavior of a Multi-Component NiFeCoCu Alloy Prepared by Electrodeposition

Wang,

Ma,

et al. 2024

Crystals

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High-entropy alloys (HEAs) have been attracting growing interest for decades due to their unique properties. Electrodeposition provides a low-cost and convenient route for producing classified types of HEAs, compared to other synthesis techniques, making it an attention-grabbing method. However, fabricating high-quality HEAs through electrodeposition in aqueous electrolytes remains a great challenge. In this study, the effects of additives and current densities on the compositions, surface morphologies, microstructures, and corrosion behavior of the electrodeposited NiFeCoCu alloy are studied. The results indicate that saccharin plays a key role in achieving a flat and bright surface for NiFeCoCu coatings, while also relieving the internal stress and improving anti-corrosion properties. Electrodeposition under a current density of 20–40 mA/cm2 results in a uniform and dense deposit with favorable properties. The present work provides a low-cost and feasible industrial solution for the preparation of HEA coatings, which holds great potential for innovation in the field of HEA coatings through electrodeposition.

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Microstructure and electrochemical properties of FeNiCoCu medium entropy alloy-graphene oxide composite coatings

Cited by 15 publications

References 20 publications

First‐Principles Calculations for the Enhancement of Mechanical Properties of High‐Entropy Alloys by Carbon Elements

First‐Principles Calculations for the Enhancement of Mechanical Properties of High‐Entropy Alloys by Carbon Elements

Graphene derivatives reinforced metal matrix nanocomposite coatings: A review

Effect of Additive and Current Density on Microstructures and Corrosion Behavior of a Multi-Component NiFeCoCu Alloy Prepared by Electrodeposition

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