Superior antifouling properties of a CoCrFeMnNi high-entropy alloy

Son, Sujung; Kim, Sinyang; Kwak, Jaeik; Gu, Gang Hee; Hwang, Dong Soo; Kim, Yong‐Tae; Kim, Hyoung Seop

doi:10.1016/j.matlet.2021.130130

Cited by 26 publications

(7 citation statements)

References 19 publications

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“…To solve these problems, it is necessary to develop new materials, since the current structural materials of nuclear plants are not capable of long-term operation in chemically aggressive environments at elevated temperatures. Achieving this goal will also give impetus to the development of jet propulsion systems and elements of aerospace vehicles [ 1 , 2 , 3 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

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Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

et al. 2023

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High-entropy alloys (HEAs) have prospects for use as nuclear structural materials. Helium irradiation can form bubbles deteriorating the structure of structural materials. The structure and composition of NiCoFeCr and NiCoFeCrMn HEAs formed by arc melting and irradiated with low-energy 40 keV He2+ ions and a fluence of 2 × 1017 cm−2 have been studied. Helium irradiation of two HEAs does not change the elemental and phase composition, and does not erode the surface. Irradiation of NiCoFeCr and NiCoFeCrMn with a fluence of 5 × 1016 cm−2 forms compressive stresses (−90 … −160 MPa) and the stresses grow over −650 MPa as fluence increases to 2 × 1017 cm−2. Compressive microstresses grow up to 2.7 GPa at a fluence of 5 × 1016 cm−2, and up to 6.8 GPa at 2 × 1017 cm−2. The dislocation density rises by a factor of 5–12 for a fluence of 5 × 1016 cm−2, and by 30–60 for a fluence of 2 × 1017 cm−2. Stresses and dislocation density in the HEAs change the most in the region of the maximal damage dose. NiCoFeCrMn has higher macro- and microstresses, dislocation density, and a larger increase in their values, with an increasing helium ion fluence compared to NiCoFeCr. NiCoFeCrMn a showed higher radiation resistance compared to NiCoFeCr.

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Section: Introductionmentioning

confidence: 99%

“…One of the most promising classes of materials for solving such problems are high-entropy alloys (HEA) [ 1 , 2 , 3 , 9 , 10 , 11 , 12 ]. They attract the attention of scientists from all over the world, and the works of the Cantor, Senkov, Yeh teams are recognized as pioneers in this field [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

et al. 2023

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“…A solution to these problems requires the development of new materials, since the current structural materials of nuclear installations are not capable of long-term operation in chemically aggressive environments at elevated temperatures. Achieving this goal will also give impetus to the development of jet power plants and elements of aerospace vehicles [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Composition and Structure of FCC-Structured High Entropy Alloys, Irradiated with Helium Ions

Uglov,

Ivanov,

Zlotski

et al. 2023

Poverhnostʹ. Rentgenovskie, sinhrotronnye i nejtronnye issledov

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In this study bulk samples of high-entropy alloys CoCrFeNi and CoCrFeMnNi, fabricated by arc melting (of pure metal powders up to 99.97%, argon atmosphere) followed by annealing (1150°C, 24 and 72 h) and cold rolling (85% decrease in thickness) were irradiated with He2+ ions (40 keV, fluence 2 × 1017 cm–2). Samples of CoCrFeNi and CoCrFeMnNi are substitutional solid solutions with a close to equiatomic composition and a uniform distribution of elements over the depth of the alloys. They have a coarse grain structure with a grain size of about 80 µm for CoCrFeNi and 100 µm for CoCrFeMnNi alloys. It was revealed that the surface microstructure, phase and elemental composition of high-entropy alloys are resistant to irradiation. No traces of radiation erosion and changes in the elemental and phase composition of the alloys were found. In alloys, the dislocation density increases, which leads to a decrease in the size of coherent scattering regions, and helium bubbles are also formed, leading to an increase in compressive macrostresses. It was found that tensile microstresses prevail in irradiated CoCrFeNi alloys, while compressive stresses prevail in CoCrFeMnNi alloys. It has been found that high-entropy CoCrFeMnNi alloys with a more complex composition are more resistant to radiation damage.

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“…One of the most perspective classes of materials for the aims named upper can be high-entropy alloys (HEAs) [1][2][3][4][5][6][7]. They are new perspective class of materials, attracting the interest of the scientists from the whole world.…”

Section: Introductionmentioning

confidence: 99%

Stress evolution in NiCoFeCrMn and NiCoFeCr high-entropy alloys irradiated by helium and krypton ions

Belov¹,

Ivanov²,

Углов³

et al. 2022

8th International Congress on Energy Fluxes and Radiation Effects

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The paper presents the results of coarse-grained (80 and 100 μm) bulk high-entropy alloys CoCrFeNi and CoCrFeMnNi samples with X-ray diffraction method in non-irradiated and ion irradiated states (He2+, 40 keV, 2×1017 cm-2and Kr14+, 280 keV, 5×1015 cm-2). It is shown, that irradiation causes compressive macrostress development, especially in regions of maximum damage dose and maximum implanted particles concentration. Also helium ion irradiation causes dislocation density increase in irradiated region, and krypton irradiation tends to decrease dislocation density in the area of maximum damage. As observed, more complex CoCrFeMnNi alloys is more resistant to defect formation than more simple CoCrFeNi.

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Superior antifouling properties of a CoCrFeMnNi high-entropy alloy

Cited by 26 publications

References 19 publications

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

Composition and Structure of FCC-Structured High Entropy Alloys, Irradiated with Helium Ions

Stress evolution in NiCoFeCrMn and NiCoFeCr high-entropy alloys irradiated by helium and krypton ions

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