Novel insight into evolution mechanism of second liquid-liquid phase separation in metastable immiscible Cu-Fe alloy

Liu, Shichao; Jie, Jinchuan; Dong, Bowen; Guo, Zhongkai; Wang, Tongmin; Li, Tingju

doi:10.1016/j.matdes.2018.06.044

Cited by 78 publications

(13 citation statements)

References 44 publications

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“…6c and d), and this resembles what we see in Ref. [35] happening with a Cu 80 Fe 20 alloy in areas saturated with iron (С Fe ∼77%). This also confirms that a liquid-phase separation of copper and iron is taking place in the specified conditions.…”

Section: Resultssupporting

confidence: 86%

The formation of Fe Cu composite based on bimetallic nanoparticles

Ложкомоев

Лернер

Первиков

et al. 2019

Vacuum

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In this paper we suggest a new method of producing a Fe-28 wt% Cu composite by compacting and subsequent sintering of bimetallic nanoparticles made of metals with limited mutual miscibility: iron and copper. The influence of the temperature of annealing on the structure and phase composition of consolidated composite samples has been analyzed. It has been shown that annealing in the temperature range of 200-400 °C induces the processes of low-temperature sintering of copper and iron. These processes are accompanied by the growth of the size of coherent scattering regions and the separation of the metallic components of nanoparticles. During thermal treatment in the range between 400 and 600 °C, adjacent sidewalls of large particles are welded together and large pores emerge in the sample. Further temperature increases cause the sample to shrink and the pores to become smaller. The consolidation of bimetallic nanoparticles consisting of iron and copper and their subsequent sintering allows for obtaining volumetric composites that have homogeneous structure without distinct macroscopic separation of phases as well as high strength characteristics.

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Section: Resultssupporting

confidence: 86%

The formation of Fe Cu composite based on bimetallic nanoparticles

Ложкомоев

Лернер

Первиков

et al. 2019

Vacuum

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“…An interesting microstructure characterized by the appearance of the so-called "spherules" of iron is presented in Figure 5a,d. Such precipitates are typical of processes involving a supercooled liquid phase as well as for non-equilibrium crystallization in the Cu-Fe system [16][17][18][19][20]. The precipitation of spherical iron particles in the tested samples is consistent with experimental data obtained by Freiße et al [11] and Dai et al [21] on the microstructure of an aluminum bronze coating obtained by laser cladding.…”

Section: Discussionsupporting

confidence: 88%

A Study of Characteristics of Aluminum Bronze Coatings Applied to Steel Using Additive Technologies

et al. 2020

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The influence of laser power on the microstructural, strength, and tribological characteristics of aluminum bronze coatings applied to steel by laser cladding was studied. It was found that with an increase in laser power, the morphology of the coating surface becomes more uniform without extreme height differences. This study revealed that the coating microstructure corresponds to that of a composite material and consists of a bronze matrix and iron dendrites of different sizes (depending on the laser power). Such a microstructure affects the microhardness indices, which have a scatter of values over the coating thickness. There is a diffusion zone at the steel–bronze interface, which promotes adhesion of the matrix and coating materials. According to the results of tribological tests, the dry friction coefficient for the studied samples is in the range of 0.389–0.574.

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“…Meanwhile, the dual FCC phases in the 2.5Al and 10Al alloys also show dendritic and inter-dendritic microstructures. It should be noted that spherical morphologies are observed in the microstructure that underwent liquid-liquid phase separation [42]. However, the present Al-Co-Cu-Mn alloys exhibit typical dendritic and inter-dendritic microstructures, meaning that the resulting microstructure is not a footprint of the liquid-liquid phase separation during casting.…”

Section: Discussionmentioning

confidence: 70%

Novel Co-Cu-Based Immiscible Medium-Entropy Alloys with Promising Mechanical Properties

Son

Moon

Kwon

et al. 2021

Metals

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New AlxCo50−xCu50−xMnx (x = 2.5, 10, and 15 atomic %, at%) immiscible medium-entropy alloys (IMMEAs) were designed based on the cobalt-copper binary system. Aluminum, a strong B2 phase former, was added to enhance yield strength and ultimate tensile strength, while manganese was added for additional solid solution strengthening. In this work, the microstructural evolution and mechanical properties of the designed Al-Co-Cu-Mn system are examined. The alloys exhibit phase separation into dual face-centered cubic (FCC) phases due to the miscibility gap of the cobalt-copper binary system with the formation of CoAl-rich B2 phases. The hard B2 phases significantly contribute to the strength of the alloys, whereas the dual FCC phases contribute to elongation mitigating brittle fracture. Consequently, analysis of the Al-Co-Cu-Mn B2-strengthened IMMEAs suggest that the new alloy design methodology results in a good combination of strength and ductility.

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Novel insight into evolution mechanism of second liquid-liquid phase separation in metastable immiscible Cu-Fe alloy

Cited by 78 publications

References 44 publications

The formation of Fe Cu composite based on bimetallic nanoparticles

The formation of Fe Cu composite based on bimetallic nanoparticles

A Study of Characteristics of Aluminum Bronze Coatings Applied to Steel Using Additive Technologies

Novel Co-Cu-Based Immiscible Medium-Entropy Alloys with Promising Mechanical Properties

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