Microstructure and corrosion properties of CrMnFeCoNi high entropy alloy coating

Ye, Qingfeng; Feng, Kai; Li, Zhuguo; Lu, Fenggui; Li, Ruifeng; Huang, Jian; Wu, Yujuan

doi:10.1016/j.apsusc.2016.11.176

Cited by 306 publications

(74 citation statements)

References 42 publications

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“…It is evident that the asatomized powder exhibits a single face-centered cubic phase without any other phases. The crystal structure of the as-atomized powder is consistent with that of the CoCrFeMnNi high-entropy alloy in the bulk or coating form [19,38,39].…”

Section: Crystal Structure Of the Cocrfemnni Powdersupporting

confidence: 55%

“…The good corrosion resistance of CoCrFeMnNi powder might be attributed to the alloying elements cobalt, chromium and nickle, which can easily form the protective film on the surface of the powder [23]. It is reported that the CoCrFeMnNi high-entropy alloy coating fabricated by laser surface alloying exhibited nobler corrosion resistance than A36 steel substrate and even lower corrosion current density than 304 stainless steel in 3.5 wt.% sodium chloride solution and 0.5 M sulfuric acid solution [19]. These results are in accordance with our research.…”

Section: Corrosion Resistancementioning

confidence: 99%

“…Among the large number of high-entropy alloys, some emphasis has been placed on the interesting of CoCrFeMnNi high-entropy alloy, the equiatomic CoCrFeMnNi high-entropy alloy demonstrates high thermodynamic stability, remarkable work hardening capacity, excellent ductility and superior corrosion resistance [10][11][12][13]. Until now, many methods were put forward to the preparation of CoCrFeMn-Ni bulk solids or coatings, such as arc-melting method, powder metallurgy, magnetron sputtering, laser cladding, electrochemical synthesis and so on [13][14][15][16][17][18][19][20][21][22]. To successfully fabricate homogenous bulk or coatings by powder metallurgy or laser cladding, it is especially important to synthesis high-entropy alloy powders with a good homogeneous microstructure.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CoCrFeMnNi high‐entropy alloy powder with excellent corrosion resistance and soft magnetic property prepared by gas atomization method

Jin¹,

Gu²,

Feng

et al. 2019

Materialwissenschaft Werkst

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To successfully fabricate high‐entropy alloys by powder metallurgy, laser cladding, or thermal sprayed method, the high‐entropy alloy powders possessing good homogeneous microstructure are very important. However, the study on the properties of the high‐entropy alloy powder has still been lacking. In this work, an equiatomic CoCrFeMnNi high‐entropy alloy powder with spherical shape was synthesized by gas atomization method. The as‐atomized CoCrFeMnNi high‐entropy alloy powder is composed of a single face‐centered cubic solid solution phase with the particle size of 34.0 μm. Furthermore, the as‐atomized powder exhibits excellent corrosion resistance in 10 % hydrochloric acid solution to 304 L stainless steel powder, and also shows an excellent soft magnetic behavior. Therefore, the gas atomization method can be used to generate other kinds of high‐entropy alloy powders for many challenging industrial applications.

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Section: Crystal Structure Of the Cocrfemnni Powdersupporting

confidence: 55%

Section: Corrosion Resistancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CoCrFeMnNi high‐entropy alloy powder with excellent corrosion resistance and soft magnetic property prepared by gas atomization method

Jin¹,

Gu²,

Feng

et al. 2019

Materialwissenschaft Werkst

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“…Rodriguez et al [8] found that the FeCoCrNiMn HEAs showed better corrosion resistance than commercial alloys UNS N10276, UNS K03014, and UNS 31600 in NaCl solution. Ye et al [9] found that the FeCoCrNiMn HEA coating obtained by laser surface alloying exhibited lower corrosion rate than 304 stainless steel in 3.5 wt% NaCl solution and 0.5 M sulfuric acid. However, it was found that the passive films on FeCoCrNiMn HEA in 0.1M H 2 SO 4 solution showed lower corrosion resistance than 304L stainless steel [10].…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance mechanism of the passive films formed on as-cast FeCoCrNiMn high-entropy alloy

Jinlong

Jin

2020

Mater. Res. Express

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The present work investigates the corrosion resistance of as-cast FeCoCrNiMn high-entropy alloy in borate buffer solution. Compared with 304 and 316L stainless steels steel, as-cast FeCoCrNiMn highentropy alloy exhibited excellent passivation ability. This should be attributed to homogenization of alloying elements. Highly corrosion-resistant elements in as-cast FeCoCrNiMn alloys, for example, Cr, Co and Ni, could promote the formation of protective passive film in borate buffer solution. Moreover, combined effect of high mixing entropy and sluggish diffusion also could improve the corrosion resistance. The formation mechanism of the passive films on the surface of as-cast FeCoCrNiMn alloys satisfied the point defect model.

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“…For those reasons, novel HEAs exhibit special and outstanding properties, such as high hardness and strength, high corrosion and wear resistance, and characteristic electrical properties [6][7][8][9][10]. It has been extensively studied for potential application in diverse areas, such as hard coatings, and diffusion barriers [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Structural and Mechanical Properties of AlCoCrNi High Entropy Nitride Films: Influence of Process Pressure

et al. 2019

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In the present study, novel AlCoCrNi high entropy nitride (HEN) films were deposited on Si substrate by a reactive direct current magnetron sputtering system. In order to investigate the influence of sputtering parameters on the microstructure and mechanical properties of the film, nitrogen flow ratio (RN: 25–100%) and process pressure (1.33 × 10−1–1.33 Pa) were controlled, respectively. All the films were identified as an amorphous phase with composition of near equiatomic ratios, regardless of the conditions of nitrogen flow ratios and process pressures. However, the limited mechanical properties were found for the films deposited under different nitrogen flow ratios with retaining the process pressure of 1.33 Pa. To enhance the mechanical properties of the AlCoCrNi HEN film, process pressure was adjusted. From the transmission electron microscopy (TEM) observation, the structure of the film deposited at the process pressure of 1.33 Pa is identified as a porous and open structure with a number of density-deficient boundary and nano-scale voids. On the other hand, densified morphology of the film was observed at pressure of 1.33 × 10−1 Pa. As a result, the hardness, elastic modulus, and H/E were improved up to 16.8, 243 GPa, and 0.0692, respectively.

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Microstructure and corrosion properties of CrMnFeCoNi high entropy alloy coating

Cited by 306 publications

References 42 publications

CoCrFeMnNi high‐entropy alloy powder with excellent corrosion resistance and soft magnetic property prepared by gas atomization method

CoCrFeMnNi high‐entropy alloy powder with excellent corrosion resistance and soft magnetic property prepared by gas atomization method

Corrosion resistance mechanism of the passive films formed on as-cast FeCoCrNiMn high-entropy alloy

Structural and Mechanical Properties of AlCoCrNi High Entropy Nitride Films: Influence of Process Pressure

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