A comprehensive investigation on microstructure and magnetic properties of immiscible Cu-Fe alloys with variation of Fe content

Liu, Shichao; Jie, Jinchuan; Guo, Zhongkai; Yue, Shipeng; Li, Tingju

doi:10.1016/j.matchemphys.2019.121909

Cited by 48 publications

(13 citation statements)

References 39 publications

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“…In addition, it is noted that the M s of CFAs decreased after annealing. This was contrary to what Liu et al reported [35]. This is because the M s of an alloy depends not only on the number of ferromagnetic magnetic domains, but also on the crystal defects (such as dislocations and phase boundaries) in the material and the size, shape and orientation distribution of the magnetic domains.…”

Section: Resultscontrasting

confidence: 61%

“…The non-ferromagnetic Cu precipitated from the Fe-rich phase had a strong pinning effect on the domain wall displacement or rotational magnetisation process, which hindered the domain wall displacement and led to the increase of coercivity after annealing. Compared with the pinning effect of precipitates, the growth of Fe phase particles and the reduction of stress removal were not the main influencing factors [35].…”

Section: Resultsmentioning

confidence: 99%

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Microstructure and properties of Cu-Fe alloys fabricated via powder metallurgy and rolling

et al. 2021

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In this work, copper ferroalloys (CFAs) with various Fe contents (5, 10 and 30 wt-%) were fabricated via the mechanical alloying and vacuum sintering method, followed by hot and cold rolling. Microstructure, mechanical, electrical and magnetic properties were investigated using scanning electron microscopy (SEM), X-Ray diffraction (XRD), tensile testing, four-point probe, vibration sample magnetometer and dc BH circuit tracer, respectively. The CFAs with homogenous and fine in-situ Fe particles prepared by powder metallurgy showed better performance compared with previously reported conventional casting. After annealing at 400°C, the cold-rolled CFA with 30 wt-% Fe had the tensile strength of 621 MPa, the electrical conductivity of 50.2% IACS, magnetic saturation strength (M s ) of 60.39 emu g −1 and coercivity (H c ) of 98.2 Oe, achieving a good combination of mechanical and functional properties. Relations between the microstructure and mechanical and functional properties are discussed in detail.

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Section: Resultscontrasting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Microstructure and properties of Cu-Fe alloys fabricated via powder metallurgy and rolling

et al. 2021

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“…The structure of alloy after solidification is composed of a mixture of Fe phase and Cu matrix. Through the mechanical deformation, Fe phase in the Cu matrix can be aligned filaments with a ribbon-like cross-section to obtain a microcomposites, which have the high strength and good electrical conductivity [5][6][7][8]. The strength of Cu-Fe alloy during the deformation process is directly affected by the volume fraction, dendrite size and distribution uniformity of Fe phase in the solidification structure [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Study on the morphology and distribution of Fe phase in solidification structure of Cu-15Fe alloy ingots

Guo

et al. 2022

Mater. Res. Express

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The realization of high strength of copper-iron (Cu-Fe) alloy is related to its solidification structure. The morphology and distribution characteristics of Fe phase in the solidification structure of Cu-15Fe alloy ingot were analyzed, and the deformation strength of the alloy was compared. The results show that the cooling conditions can affect the size, morphology and distribution of Fe phase in the solidified structure. The average distribution uniformity in the water-cooled copper mold ingot (W-ingot) is 0.45% higher than that in the quartz mold ingot (Q-ingot). The distribution quality of Fe phase in solidification structure can be evaluated by fractal dimension and average Fe phase area. The larger the fractal dimension is, the smaller the average Fe phase area is, where Fe phase is smaller and more uniform in the corresponding region. In the experiment, the strength of the strip increased from 510 to 547 Mpa corresponds to the Q-ingot and the W-ingot.

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“…In this case, elements show no mutual solubility at room temperature and, therefore, the equilibrium microstructure is composed of separated phases of two pure elements. This allows preparing materials with an interesting combination of properties such as high strength and high electrical conductivity or superior magnetic properties [4][5][6][7] that is difficult to achieve with common materials. In addition, it is possible to alloy a selected phase by elements miscible with one of the basic components and immiscible with the second one, which allows control the resulting microstructure and tailor the mechanical properties [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Influence of milling time on the microstructure of immiscible Cu-Fe-Co-w alloy prepared by powder metallurgy

Adam

Janík

2020

METAL 2020 Conference Proeedings

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The immiscible Cu-Fe system is often used as a base for new advanced alloys. In the current study, three batches of the same immiscible (Cu70Fe15Co15)89W11 alloy were prepared by mechanical alloying with different milling time and subsequent SPS consolidation. The effect of milling time on the microstructure and the properties of the powder and bulk samples was subject to study. The microstructure of the milled powder samples consists of FCC Cu-based supersaturated solid solution and particles of pure W, which did dissolve only partially. During the SPS consolidation, Cu-based supersaturated solid solution partially decomposed and (Fe, Co)-based solid solution, (Fe, Co)7W6 phase, and pure Cu phase were formed. Increasing the milling time results in the finer microstructure of the consolidated samples and in the enhancement of their hardness. The maximum hardness achieved is 395HV1. The longer milling time has a negative effect of decrease in relative density of consolidated samples, caused by larger size of the milled powders.

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A comprehensive investigation on microstructure and magnetic properties of immiscible Cu-Fe alloys with variation of Fe content

Cited by 48 publications

References 39 publications

Microstructure and properties of Cu-Fe alloys fabricated via powder metallurgy and rolling

Microstructure and properties of Cu-Fe alloys fabricated via powder metallurgy and rolling

Study on the morphology and distribution of Fe phase in solidification structure of Cu-15Fe alloy ingots

Influence of milling time on the microstructure of immiscible Cu-Fe-Co-w alloy prepared by powder metallurgy

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