Dynamics of core–shell particle formation in drop-tube processed metastable monotectic alloys

Jegede, Oluwatoyin Enitan; Bigg, Timothy D.; Mullis, Andrew M.

doi:10.1016/j.actamat.2020.02.017

Cited by 39 publications

(9 citation statements)

References 25 publications

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“…Although we have unveiled that BCC dendritic growth occurs in powders d < 212 µm in size, measuring the undercooling required for this growth condition is not possible during drop-tube experiments. However, it has previously been estimated that the undercooling of Co-Cu droplets of similar size, based on the kinetics of monotectic liquid phase separation, is 210-250 K [40]. This value is in-line with the undercooling observed to mediate the order-disorder transformation in other materials [40].…”

Section: Resultssupporting

confidence: 64%

Rapid solidification of AlCoCrFeNi2.1 High-entropy Alloy

Nassar

Mullis

Aslam

et al. 2022

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 64%

Rapid solidification of AlCoCrFeNi2.1 High-entropy Alloy

Nassar

Mullis

Aslam

et al. 2022

Journal of Alloys and Compounds

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“…Mechanism of formation and characteristics of these microstructures in drop tube processed 50 at. % Co alloy is available in literature [12,13]. Other researchers have also reported that the alloy is dendritic and that LPS is only feasible in the alloy at higher degree of undercooling [2,8,9].…”

Section: Takedownmentioning

confidence: 99%

Solidification transformations in liquid phase separated metastable monotectic Cu-50 at. % Co alloy

2021

Self Cite

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Metastable monotectic Cu – 50 at. % Co alloy produced by arc melting has been processed under micro gravity condition using a drop tube and subjected to differential thermal analysis (DTA). Microstructural evidence from the as solidified sample revealed that rapid cooling of the arc melt process was enough to incite liquid phase separation in the alloy. In the drop tube samples, the melting temperature of the β- phase (Cu – rich) was determined to be 1294.8 K while that of the α- phase (Co – rich) was found to vary with cobalt content.

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“…When the uniform immiscible alloy melt is cooled into the miscibility gap of the component, the evolution of the microstructure in liquid-liquid phase transformation is the result of the interaction of droplet nucleation, diffusion growth/coarsening [33,34], spatial migration and the resulting collision and coagulation and two-phase separation [35,36]. The solidification pathways in immiscible Cu-Co alloy with different undercoolings were systematically expounded by Wei at al.…”

Section: The Solidification Process Of Immiscible Alloymentioning

confidence: 99%

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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Dynamics of core–shell particle formation in drop-tube processed metastable monotectic alloys

Abstract: This is a repository copy of Dynamics of core-shell particle formation in drop-tube processed metastable monotectic alloys.

Cited by 39 publications

References 25 publications

Rapid solidification of AlCoCrFeNi2.1 High-entropy Alloy

Rapid solidification of AlCoCrFeNi2.1 High-entropy Alloy

Solidification transformations in liquid phase separated metastable monotectic Cu-50 at. % Co alloy

Solidification of Immiscible Alloys under High Magnetic Field: A Review

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