Electrochemical Synthesis and Structural Study of Bi-Tm-Ni-Fe-Co-Mn High Entropy Alloy Film

Yao, Chenzhong; Zhang, Peng; He, Xiao-hui; Li, Gao-ren; Liu, Peng; Tong, Ye-xiang

doi:10.1149/ma2008-02/39/2529

Cited by 4 publications

(8 citation statements)

References 2 publications

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“…Li et al [22][23][24][25] investigated the preparing of TmFeCoNiMn, BiFeCoNiMn, and MgMn-FeCoNiGd multi-component HEA thin films by electrochemical deposition and researched their potential as materials solutions for next-generation thermoelectric, magnetic, and photoelectronic and fuel cell applications.…”

Section: Introductionmentioning

confidence: 99%

Influence of Heat Treatment on the Corrosion Behavior of Electrodeposited CoCrFeMnNi High-Entropy Alloy Thin Films

Popescu¹,

Brânzoi²,

Atkinson³

et al. 2022

Coatings

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In this paper, we investigate what effects heat treatment can have on potentiodynamically electrodeposited high-entropy thin film (HEA) CoCrFeMnNi alloys. We focused our study on the corrosion resistance in synthetic seawater, corroborated with the structure and microstructure of these thin films. Thin films of HEA alloys were deposited on a copper foil substrate, using an electrolyte based on the organic system dimethyl-sulfoxide (DMSO-(CH3)2SO)-acetonitrile (AN-CH3CN) (in a volume ratio of 4:1), which contains LiClO4 as electrolyte support and chloride salts of CoCl2, CrCl3 × 6H2O, FeCl2 × 4H2O, MnCl2 × 4H2O and NiCl2 × 6H2O. Using MatCalc PC software, based on the CALPHAD method, the structure and characteristics of the HEA system were investigated, and thermodynamic and kinetic criteria were calculated. The modeling process generated in the body-centered-cubic (BCC) or face-centered-cubic (FCC) structures a series of optimal compositions that are appropriate to be used in anticorrosive and tribological applications in a marine environment. Electrochemical measurements were carried out in an aerated artificial seawater solution at ambient temperature. In the experimental media, HEA thin films proved to have good corrosion resistance and were even better than the copper substrate. Corrosion resistance was improved after heat treatment, as shown by polarization and EIS tests. The structure and microstructure of HEA thin films before and after corrosion in artificial seawater were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The XRD data showed no significant changes in the structure of HEA heat-treated thin films after the corrosion in saline media. The data obtained by polarization and ESI are supported by results from SEM-EDS. This complex study reveals that, for HEA thin films, heat treatment leads to an increase in corrosion resistance. So, this finding suggests that thermal annealing is an appropriate method for improving the corrosion performance of HEA thin films.

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Section: Introductionmentioning

confidence: 99%

Influence of Heat Treatment on the Corrosion Behavior of Electrodeposited CoCrFeMnNi High-Entropy Alloy Thin Films

Popescu¹,

Brânzoi²,

Atkinson³

et al. 2022

Coatings

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“…At present, the preparation methods of HEAs include laser cladding, magnetron sputtering, plasma spraying, etc. [6][7][8][9][10][11][12]. Among them, the plasma spraying has many unique advantages, such as high deposition efficiency, a wide range of sprayable materials and ability to form coatings on various substrates, which is a feasible method to fabricate HEA coatings [13].…”

Section: Introductionmentioning

confidence: 99%

Structural and electrochemical corrosion properties of plasma-sprayed CoCrFeNiMo HEA coating in corrosive solutions

Zhicheng

Dejun

2022

Corrosion Engineering, Science and Technology

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A CoCrFeNiMo high-entropy alloy (HEA) coating was prepared on Ti6Al4V alloy by plasma spraying technique. The microstructure and phases of the obtained coating were analysed using an ultradepth-of-field microscope and X-ray diffraction, respectively. The electrochemical corrosion properties of CoCrFeNiMo HEA coating in 3.5% NaCl, 0.1 M H 2 SO 4 and 0.1 M NaOH solutions were comparatively evaluated using an electrochemical workstation, and the corrosion mechanisms were also discussed by the corrosion models. The results show that the CoCrFeNiMo HEA coating is mainly a solid solution structure of face-centered cubic, which forms mechanical bonding at the coating interface. The charge transfer resistance R ct of 597 × 10 16 μA•cm -2 in 0.1 M H 2 SO 4 solution is the highest and the corrosion current density i corr of 4.203 × 10 -7 μA•cm -2 also presents the lowest among the three kinds of corrosive solutions, which shows the highest electrochemical corrosion resistance. As a result, the sequence of corrosion resistance is in 0.1 M H 2 SO 4 solution > in 3.5% NaCl solution > in 0.1 M NaOH solution, in which the corrosion resistance is further improved by the passive film on the CoCrFeNiMo HEA coating.

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“…Thus far, most HEAs and HEOs have been synthesized through casting, sintering, and laser cladding. However, for efficiencies in resource use, weight reduction, corrosion resistance, hardness, wear resistance, electrocatalytic and electromagnetic properties, coatings of HEAs or HEOs have been synthesized by thermal spraying [13], magnetron sputtering [14][15][16][17], and electrodeposition [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…As for electrodeposition of HEAs, Yao et al produced amorphous coatings of BiFeCoN-iMn, NdFeCoNiMn, MgMnFeCoNiGd, and NiFeCoMnBiTm in DMF-CH 3 CN or DMSO solvent, and the effects of Bi and Fe on magnetic properties of the coatings were investigated [18][19][20][21]. Following this, Soare et al [23] produced amorphous coatings of AlCr-FeMnNi and AlCrCuFeMnNi in DMF-CH 3 CN, and Zheng et al [22] got an amorphous coating of FeNiCoBiMn in CH 3 CH-C 3 H 7 NO solvent.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Oxygen-Carbon-Contained CrMnFeCoNi Coatings Electrodeposited in DMF-CH3CN Solution with and without Supporting Electrolyte LiClO4

et al. 2022

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Oxygen-carbon-contained CrMnFeCoNi coatings were electrodeposited in an organic solvent of DMF-CH3CN (N,N-dimethylformamide-acetonitrile) containing chlorides of chromium, manganese, iron, cobalt, and nickel, with or without supporting electrolyte lithium perchlorate (LiClO4). The coatings’ composition, structure, hardness, and electrocatalytic properties were examined. The presence of lithium in coatings obtained with LiClO4 showed it unsuitable as a supporting electrolyte in this fabrication process. Without LiClO4, oxygen-carbon-contained CrMnFeCoNi coatings were obtained at constant potentials at −2.0, −2.5, and −3.0 V (vs. SSE) by enhancing the concentrations of the target metal ions in the solution. These coatings were mainly amorphous with nanocrystals, which were comprised of >50 atom% oxygen atoms, >7 atom% carbon atoms, and near equiatomic Cr, Mn, Fe, Co, and Ni, showing a high level of hardness and advanced electrocatalytic activity in the oxygen evolution reaction.

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Electrochemical Synthesis and Structural Study of Bi-Tm-Ni-Fe-Co-Mn High Entropy Alloy Film

Abstract: not Available.

Cited by 4 publications

References 2 publications

Influence of Heat Treatment on the Corrosion Behavior of Electrodeposited CoCrFeMnNi High-Entropy Alloy Thin Films

Influence of Heat Treatment on the Corrosion Behavior of Electrodeposited CoCrFeMnNi High-Entropy Alloy Thin Films

Structural and electrochemical corrosion properties of plasma-sprayed CoCrFeNiMo HEA coating in corrosive solutions

Fabrication and Characterization of Oxygen-Carbon-Contained CrMnFeCoNi Coatings Electrodeposited in DMF-CH3CN Solution with and without Supporting Electrolyte LiClO4

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