CoCrxCuFeMnNi high-entropy alloy powders with superior soft magnetic properties

Zhao, Runze; Ren, Bo; Zhang, Guopeng; Liu, Zhongxia; Cai, Bin; Zhang, Jianjian

doi:10.1016/j.jmmm.2019.165574

Cited by 46 publications

(16 citation statements)

References 28 publications

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“…(3) Field dependence of the magnetization indicated that the material acts differently than magnetically homogeneous ferromagnetic material where the magnetic moment is expected to saturate with an increasing magnetic field. In general, many magnetic states such as ferromagnetism 3 , 20 , 46 , ferrimagnetism 14 , 33 , antiferromagnetism 12 , and paramagnetism 47 are present in high entropy alloys materials due to complex magnetic couplings of constituent 3d elements. Often subtle compositional changes in 4 and 5 element systems stabilize one magnetic phase over the other.…”

Section: Resultsmentioning

confidence: 99%

Magnetic, electrical and mechanical properties of Fe40Mn40Co10Cr10 high entropy alloy

Egilmez

Abuzaid

2021

Sci Rep

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A prototypical, single-phase, and non-equiatomic high entropy alloy Fe40Mn40Co10Cr10 has been mechanically deformed at room and cryogenic temperatures. Plastic deformation was accommodated via crystallographic slip at room temperature while transformation induced plasticity (TRIP) has been observed in samples deformed at 77 K. The stress-induced martensitic transformation occurred from face-centered cubic (FCC) to hexagonal close-packed (HCP) structures. A detailed electron backscatter diffraction analysis was utilized to detect phase change and evaluate the evolution of the HCP phase volume fraction as a function of plastic strain. Physical properties of undeformed and deformed samples were measured to elucidate the effect of deformation-induced phase transitions on the magnetic and electrical properties of Fe40Mn40Co10Cr10 alloy. Relatively small magnetic moments along with non-saturating magnetic field dependencies suggest that the ground state in the considered material is ferrimagnetic ordering with coexisting antiferromagnetic phase. The temperature evolution of the coercive fields has been revealed for all samples. The magnitudes of the coercive fields place the considered system into the semi-hard magnetic alloys category. The temperature dependence of the zero-field cooled (ZFC) and field cooled (FC) magnetization was measured for all samples in the low field regime and the origin of irreversibility in ZFC/FC curves was discussed. Besides, the temperature dependence of the resistivity in all samples was measured and the possible conduction mechanisms were discussed.

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Section: Resultsmentioning

confidence: 99%

Magnetic, electrical and mechanical properties of Fe40Mn40Co10Cr10 high entropy alloy

Egilmez

Abuzaid

2021

Sci Rep

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“…Nowadays, most of the electronics and computational devices facilitate magnetism and magnetic materials as the smart functional materials [71]. The excellent mechanical properties of high-entropy alloys can improve the reliability of these modern devices [72][73][74].…”

Section: Combinatorial Approaches For Magnetic Featuresmentioning

confidence: 99%

Mechanical and Magnetic Properties of the High-Entropy Alloys for Combinatorial Approaches

et al. 2020

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This review summarizes the state of high-entropy alloys and their combinatorial approaches, mainly considering their magnetic applications. Several earlier studies on high-entropy alloy properties, such as magnetic, wear, and corrosion behavior; different forms, such as thin films, nanowires, thermal spray coatings; specific treatments, such as plasma spraying and inclusion effects; and unique applications, such as welding, are summarized. High-entropy alloy systems that were reported for both their mechanical and magnetic properties are compared through the combination of their Young’s modulus, yield strength, remanent induction, and coercive force. Several potential applications requiring both mechanical and magnetic properties are reported.

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“…High entropy alloys (HEA) are an emerging group of materials containing five or more metallic elements that are uniformly mixed in a crystalline solid-solution phase that is stabilized by high mixing entropy. − HEA nanoparticles (HEA-NPs) have recently received significant attention for energy and catalysis applications due to their advantageous physicochemical properties, including a broad selection of elements, high corrosion resistance, high thermal and chemical stability, enhanced mechanical strength, and increased catalytic activity due to the synergistic catalytic reaction of elements. − …”

Section: Introductionmentioning

confidence: 99%

Scalable Synthesis of High Entropy Alloy Nanoparticles by Microwave Heating

et al. 2021

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High entropy alloy nanoparticles (HEA-NPs) are reported to have superior performance in catalysis, energy storage, and conversion due to the broad range of elements that can be incorporated in these materials, enabling tunable activity, excellent thermal and chemical stability, and a synergistic catalytic effect. However, scaling the manufacturing of HEA-NPs with uniform particle size and homogeneous elemental distribution efficiently is still a challenge due to the required critical synthetic conditions where high temperature is typically involved. In this work, we demonstrate an efficient and scalable microwave heating method using carbon-based materials as substrates to fabricate HEA-NPs with uniform particle size. Due to the abundant functional group defects that can absorb microwave efficiently, reduced graphene oxide is employed as a model substrate to produce an average temperature reaching as high as ∼1850 K within seconds. As a proof-of-concept, we utilize this rapid, high-temperature heating process to synthesize PtPdFeCoNi HEA-NPs, which exhibit an average particle size of ∼12 nm and uniform elemental mixing resulting from decomposition nearly at the same time and liquid metal solidification without diffusion. Various carbon-based materials can also be employed as substrates, including one-dimensional carbon nanofibers and three-dimensional carbonized wood, which can achieve temperatures of >1400 K. This facile and efficient microwave heating method is also compatible with the roll-to-roll process, providing a feasible route for scalable HEA-NPs manufacturing.

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CoCrxCuFeMnNi high-entropy alloy powders with superior soft magnetic properties

Cited by 46 publications

References 28 publications

Magnetic, electrical and mechanical properties of Fe40Mn40Co10Cr10 high entropy alloy

Magnetic, electrical and mechanical properties of Fe40Mn40Co10Cr10 high entropy alloy

Mechanical and Magnetic Properties of the High-Entropy Alloys for Combinatorial Approaches

Scalable Synthesis of High Entropy Alloy Nanoparticles by Microwave Heating

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