Structure and magnetic properties of spinodal decomposed Cu60Ni20Fe10Co10 ribbons with hard magnetism

Ma, Dongqin; Ge, Zi-Hui; Cao, Yun-Fe; Ding, He-Wei; Jiang, Yihua; Sun, Ji-Bing

doi:10.1016/j.jmmm.2021.167949

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…Melt-spinning (MS) is a time-saving and cost-effective method to produce nanostructures . Although Cu–Ni-based alloys such as Mg 25– x Y x Ni 9 Cu and Cu 60 Ni 20 Fe 10 Co 10 have utilized MS for the improvement of the magnetic property or hydrogen storage performance, this method has rarely been reported in the metal thermoelectric area.…”

Section: Introductionmentioning

confidence: 99%

Multi-Interface-Induced Thermal Conductivity Reduction and Thermoelectric Performance Improvement in a Cu–Ni Alloy

Jia

Zhong

et al. 2022

ACS Appl. Energy Mater.

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A Cu–Ni-based alloy with a high power factor is a commercially utilized metallic thermocouple material. However, the high thermal conductivity has been a major limitation to achieving thermoelectric performance in semiconductor materials. Herein, this work presents a 76.1% reduced thermal conductivity (∼7.7 W m–1 K–1) in Cu70Ni30, which is one of the lowest reported values in the literature. Such suppression of thermal conductivity can be attributed to the varied frequency phonon scattering by the interfacial potential barrier, built from micron-scale defects formed via sintering melt-spun ribbons. However, the defects simultaneously reduce the charge carrier concentration, mobility, and thus the electrical conductivity. The lowest thermal conductivity leads to the highest zT and ZT avg in the sample sintered at 673 K under 15 MPa. The values are 0.24 (@573 K) and 0.15 (323–573 K), respectively, which are 130.3 and 140.0% higher than the values of the pristine counterpart. Our work demonstrates that improved thermoelectric performance in Cu–Ni-based alloys can be obtained by creating various interfacial defects even at micron scales, which paves the way to suppress thermal conductivity largely in metallic thermoelectric materials via melt-spinning (MS) and spark plasma sintering (SPS) synthesis.

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Section: Introductionmentioning

confidence: 99%

Multi-Interface-Induced Thermal Conductivity Reduction and Thermoelectric Performance Improvement in a Cu–Ni Alloy

Jia

Zhong

et al. 2022

ACS Appl. Energy Mater.

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Nitrogen–carbon-induced spinodal structure in plasma nitrocarburized 38CrMoAl with hollow cathode discharging

Zhang,

Wang,

Shao

et al. 2024

J Mater Sci

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Magnetic Properties and Microstructure of an Isothermal Annealed and Mechanically Milled Nanocrystalline Ag−Mn Alloy

Chabri

2023

Int. J. Nanosci.

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The alloy 50Ag–50Mn (wt.%) was prepared using ball milling. After 50 h of milling, the samples were isothermally annealed for 1 h at a time at three different temperatures ranging from 350[Formula: see text]C to 550[Formula: see text]C. By analyzing the X-ray diffraction data, Rietveld refinement structure analysis was used to measure the lattice strain and crystallite size. The introduction of lattice strain and the decrease in crystallite size as a function of milling time may both contribute to the increase in coercivity. The analysis of superconducting quantum interference devices demonstrates the soft ferromagnetic behavior of as-milled and annealed Ag–Mn alloy. After being annealed at 350[Formula: see text]C for 1 h, the 50Ag–50Mn alloy’s maximum coercivity was discovered to be 253 Oe.

show abstract

Structure and magnetic properties of spinodal decomposed Cu60Ni20Fe10Co10 ribbons with hard magnetism

Cited by 3 publications

References 24 publications

Multi-Interface-Induced Thermal Conductivity Reduction and Thermoelectric Performance Improvement in a Cu–Ni Alloy

Multi-Interface-Induced Thermal Conductivity Reduction and Thermoelectric Performance Improvement in a Cu–Ni Alloy

Nitrogen–carbon-induced spinodal structure in plasma nitrocarburized 38CrMoAl with hollow cathode discharging

Magnetic Properties and Microstructure of an Isothermal Annealed and Mechanically Milled Nanocrystalline Ag−Mn Alloy

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