Liquid-liquid phase separation in immiscible Cu-Co alloy

Chen, Wei; Wang, Jun; He, Yixuan; Yan, Yujie; Gao, Jianglin; Li, Jinshan; Beaugnon, Eric

doi:10.1016/j.matlet.2020.127585

Cited by 17 publications

(5 citation statements)

References 11 publications

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“…The solidification pathways in immiscible Cu-Co alloy with different undercoolings were systematically expounded by Wei at al. [37], as shown in Figure 2. For the undercooling above the metastable miscibility gap, the solidification of the immiscible alloy commenced in a normal way, accompanied by nucleation and growth of the primary α-Co dendrites.…”

Section: The Solidification Process Of Immiscible Alloymentioning

confidence: 84%

“…(a) Modest undercooling, i.e., TN is above the TB1, the liquid miscibility gap for the primary liquid-liquid phase separation (LLPS). (b) Large undercooling, i.e., TN, is below the TB2, the liquid miscibility gap of the separated Co-rich droplet formed via the primary LLPS [37].…”

Section: The Solidification Process Of Immiscible Alloymentioning

confidence: 99%

“…Al-Pb alloy Pb-rich phase Migration damping [79,80] Al-In alloy In-rich phase Segregation damping, alignment [65] Al-Ni alloy Al 3 Ni phase Segregation, alignment, rotation [77] Al-Bi alloy Bi-rich phase Segregation damping [109] In-Sn alloy Sn-rich phase Diffusion damping [58,59] Cu-Pb alloy Pb-rich phase Segregation damping [64] Cu-Co alloy Co-rich phase Magnetization energy, segregation damping [37,84] Bi-Zn alloy Bi-rich phase Segregation damping, alignment [78,99] Mn-Bi alloy Mn-Bi phase Alignment, segregation [91] Bi-Mn alloy Mn crystal Segregation, interaction, alignment [93] Fe-Si alloy α-Fe crystal Orientation, alignment [98] Fe-Sn alloy Fe-rich phase Orientation, alignment [102]…”

Section: Immiscible Alloy Minority Phase Hmf Influences Referencesmentioning

confidence: 99%

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Solidification of Immiscible Alloys under High Magnetic Field: A Review

Chen

Wang

et al. 2021

Metals

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Immiscible alloy is a kind of functional metal material with broad application prospects in industry and electronic fields, which has aroused extensive attention in recent decades. In the solidification process of metallic material processing, various attractive phenomena can be realized by applying a high magnetic field (HMF), including the nucleation and growth of alloys and microstructure evolution, etc. The selectivity provided by Lorentz force, thermoelectric magnetic force, and magnetic force or a combination of magnetic field effects can effectively control the solidification process of the melt. Recent advances in the understanding of the development of immiscible alloys in the solidification microstructure induced by HMF are reviewed. In this review, the immiscible alloy systems are introduced and inspected, with the main focus on the relationship between the migration behavior of the phase and evolution of the solidification microstructure under HMF. Special attention is paid to the mechanism of microstructure evolution caused by the magnetic field and its influence on performance. The ability of HMF to overcome microstructural heterogeneity in the solidification process provides freedom to design and modify new functional immiscible materials with desired physical properties. This review aims to offer an overview of the latest progress in HMF processing of immiscible alloys.

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Section: The Solidification Process Of Immiscible Alloymentioning

confidence: 84%

Section: The Solidification Process Of Immiscible Alloymentioning

confidence: 99%

Section: Immiscible Alloy Minority Phase Hmf Influences Referencesmentioning

confidence: 99%

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Solidification of Immiscible Alloys under High Magnetic Field: A Review

Chen

Wang

et al. 2021

Metals

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“…The binary Cu-Cr alloy system has a large positive mixing heat in the supercooled melt [6], and this results in a metastable miscibility zone below its liquidus [7][8][9]. As shown in figure 1, when the alloy is cooled to miscibility zone, the alloy will undergo liquid phase separation, resulting in two immiscible liquid phases: Cr-rich droplets in copper melt.…”

Section: Introductionmentioning

confidence: 99%

Effects of Cr content and electromagnetic stirring on the phase separation of Cu-Cr alloy

Yang¹,

Qinglin²

2022

Mater. Res. Express

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The Cu-Cr immiscible alloys were prepared by arc melting. The effects of Cr addition and electromagnetic stirring on the phase separation, microstructure were examined. The results show that serious phase segregation occurs at the center of the sample with increasing Cr contents, forming a sandwich like structure. The shape of the primary Cr transforms from fine dendrite to more developed dendrite. Thermodynamic analysis indicates that Cr addition increases the driving force for the liquid phase separation. The electromagnetic stirring can facilitate the relative motion between the Cr droplets and the melts, and thus intensify the segregation phenomenon. With Cr additions, the hardness in non-segregated area shows only slight increase, and in Cr segregated area shows a significant increase. While the electrical conductivity shows only slight decrease with increasing Cr content.

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“…Moreover, the application of external fields also has an essential effect on the microstructure evolution of immiscible alloys [11][12][13][14][15][16][17][18][19][20] . Wei et al [21,22] found that Lorentz force generated by the magnetic field suppressed the effect of Marangoni convection in the Cu-Co alloy, resulting in a dispersed distribution of the Co-rich phase. Zheng et al [23] found that when a magnetic field applied was greater than 1 T, the melt movement and aggregation velocity in Cu-Pb and Bi-Zn alloys would be suppressed, and the microstructure would be more diffuse.…”

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confidence: 99%

Effect of high magnetic field on solidification microstructure evolution of a Cu-Fe immiscible alloy

Yan

Chen

et al. 2022

China Foundry

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Immiscible alloy, also known as liquid phase separation alloy, has been of increasing interest in recent years. Many immiscible alloys have special physical and mechanical properties [1][2][3][4] . For instance, liquid immiscible alloys like Cu-Pb and Al-Pb alloys with high thermal conductivity and low friction coefficient can be used as advanced bearing materials [5] , and Cu-Co system alloys are excellent magneto-resistive materials [6] .Liquid phase separation is an important phenomenon for immiscible alloys. During the solidification process, when the alloy cools to the critical temperature, the melt immediately enters the immiscible zone and undergoes a phase transformation in which the parent phase L decomposes into two liquid phases, L 1 and L 2 , with different compositions and densities. Finally, the liquid

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Liquid-liquid phase separation in immiscible Cu-Co alloy

Cited by 17 publications

References 11 publications

Solidification of Immiscible Alloys under High Magnetic Field: A Review

Solidification of Immiscible Alloys under High Magnetic Field: A Review

Effects of Cr content and electromagnetic stirring on the phase separation of Cu-Cr alloy

Effect of high magnetic field on solidification microstructure evolution of a Cu-Fe immiscible alloy

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