Alloying, phases and magnetic behaviour of mechanically alloyed FeNiMnCu-based high entropy alloys

Jahani, Nasim; Reihanian, M.; Gheisari, Kh.

doi:10.1080/02670836.2023.2180902

Cited by 13 publications

(3 citation statements)

References 77 publications

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“…Table 3 provides a comprehensive overview of stability criteria (Ω, Λ, ϕ Ye , and

) for the two studied alloys and a wide range of other alloys produced via mechanical alloying, drawn from various sources in the literature [ 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 ]. The table shows the reported microstructure in the as-milled state as well as in the annealed state.…”

Section: Discussionmentioning

confidence: 99%

Mechanical Alloying as a Way to Produce Metastable Single-Phase High-Entropy Alloys beyond the Stability Criteria

Santiago-Andrades,

Vidal-Crespo,

Blázquez

et al. 2023

Nanomaterials

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Various stability criteria developed for high-entropy alloys are applied to compositions produced by mechanical alloying. While they agree with the annealed samples, these criteria fail to describe the as-milled metastable systems, highlighting the ability of mechanical alloying to overcome the limitations imposed by these criteria. The criteria are based on atomic size (Ω ≥ 1.1 and δr ≤ 6.6%) and/or electronegativity misfit, as well as on mixing enthalpy (Λ>0.95 J mol−1K−1 and −5 kJ mol−1<∆Hmix<0), or purely thermodynamic (ϕYe>20; ϕKing>1; Teff<500 K). These criteria are applied to several compositions found in the literature and to two metastable fcc solid solutions produced by mechanical alloying with compositions Al0.75CoXFeNi with X = Cr and Mn. Single-phase microstructures are stable up to above 600 K, leading to more stable multiphase systems after annealing above this temperature. Mössbauer spectrometry shows that, whereas the alloy with Cr is paramagnetic in the as-milled and annealed state, the alloy with Mn changes from paramagnetic to ferromagnetic behavior (Curie temperature ~700 K) after annealing. Thermomagnetic experiments on annealed samples show for both compositions some hysteretic events at high temperatures (850 to 1000 K), probably ascribed to reversible ordering phenomena.

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“…Table 3 provides a comprehensive overview of stability criteria (Ω, Λ, ϕ Ye , and

Section: Discussionmentioning

confidence: 99%

Mechanical Alloying as a Way to Produce Metastable Single-Phase High-Entropy Alloys beyond the Stability Criteria

Santiago-Andrades,

Vidal-Crespo,

Blázquez

et al. 2023

Nanomaterials

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“…7 However, the low hardness, strength and wear resistance greatly limit their applications and the high CTE of Cu seems to be incompatible with chip materials. [8][9][10] In this context, the excellent mechanical properties and low CTE of highentropy alloys (HEA) at room temperature offer the opportunity to broaden the choice of substrates. [11][12][13][14] For example, Lin et al 15 found that CoCrFeNiTiNbBx HEA coating can significantly improve the wear resistance of the matrix.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, mechanical alloying (MA), as a solid-state coating deposition process, has shown great potential in the preparation of nanomaterials, thermoelectric materials, superconducting materials and other new materials. 10 Compared to other coating deposition techniques, MA can avoid defects caused by metallurgical reactions. 20 At the same time, metal matrix composite (MMC) coatings have received much attention as a ductile-brittle system, in which some ductile materials (such as Fe, 21 Cu, 22 et al) are used as binders and various reinforcement phases such as HEAs, 23 TiC, 24 WC 25 and TiO 2 2 are added to obtain excellent mechanical or thermal properties.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Cu-diamond/Cu-diamond-high-entropy alloys bi-layer coating via mechanical alloying

Sun,

Zang,

Yang

et al. 2024

Surface Engineering

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In this work, Cu-diamond/Cu-diamond-Cu2NiAlAgZn bi-layer coatings were prepared via mechanical alloying on copper substrate, in which Cu-diamond was the inner layer and Cu-diamond-Cu2NiAlAgZn was the outer layer. The results revealed that the quinary alloy Cu2NiAlAgZn HEAs has simple FCC solid solution structure and the interface of bi-layer coating is identifiable. The inner gray area consisted of a Cu-diamond composite, while the outer gray area was a Cu2NiAlAgZn HEAs reinforced Cu matrix composite. However, there were some defects in the microstructure and the compactness was not satisfactory. Therefore, recrystallization annealing treatment was performed on the bi-layer coatings. The microhardness distribution from the substrate to the coating showed the characteristics of ‘increase-drop-increase’ before and after heat treatment. Although the microhardness slightly decreased, heat treatment resulted in a denser coating and eliminated defects. Moreover, the thermal and electrical conductivity of the sample that have undergone heat treatment significantly increased.

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Energy Transfer by Mechanical Alloying and Electrocatalytic Performance of the As‐Sintered Self‐Supported High‐Entropy Alloy FeNiCoCuMo

Jimenez‐Arevalo,

Martin,

Pio

et al. 2024

Adv Eng Mater

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Efficient, stable, and cost‐effective electrocatalysts for the oxygen evolution reaction (OER) are essential for clean energy generation through water splitting. This study presents a FeNiCoCuMo high‐entropy alloy (HEA) synthesized via mechanical alloying (MA) and sintering using hot‐pressing. The energy transfer from the milling process influences phase transformations, with the High‐Entropy Alloys Prediction Software (HEAPS) predicting the formation of an FCC phase. X‐ray diffraction (XRD) and scanning electron microscopy reveal an FCC phase after 150 h of milling, with no elemental segregation observed. The Burgio kinetic model estimates 448 kJ mol−1 is needed to achieve a 99% FCC phase. The crystallite size is 4 nm, with a lattice parameter of 0.371 nm. The as‐milled phases were preserved during hot‐pressing sintering. Electrodes (M1, M2, M3) fabricated from the HEA demonstrated high electrocatalytic efficiency, with an average overpotential of 380 mV and Tafel slope of 77 mV dec−1. At a current density of 10 mA cm−2, the electrodes maintained operation for up to 100 h. The synergy between constituent elements is key to the superior electrocatalytic performance of FeNiCoCuMo HEAs, demonstrating their potential as promising materials for OER electrocatalysis.

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Alloying, phases and magnetic behaviour of mechanically alloyed FeNiMnCu-based high entropy alloys

Cited by 13 publications

References 77 publications

Mechanical Alloying as a Way to Produce Metastable Single-Phase High-Entropy Alloys beyond the Stability Criteria

Mechanical Alloying as a Way to Produce Metastable Single-Phase High-Entropy Alloys beyond the Stability Criteria

Investigation of Cu-diamond/Cu-diamond-high-entropy alloys bi-layer coating via mechanical alloying

Energy Transfer by Mechanical Alloying and Electrocatalytic Performance of the As‐Sintered Self‐Supported High‐Entropy Alloy FeNiCoCuMo

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