In situ preparation of symmetrically graded microstructures by solidification in high-gradient magnetic field after melt and partial-melt processes

Dong, Meng; Liu, Tie; Liao, Jing; Xiao, Yu; Yuan, Yong; Wang, Qiang

doi:10.1016/j.jallcom.2016.08.074

Cited by 15 publications

(12 citation statements)

References 24 publications

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“…According to the magnetic susceptibility of materials, the magnetic force is imposed in the direction of gravity or the opposite direction of gravity. The force on the z-axis component is given by [32]…”

Section: Magnetic Forcementioning

confidence: 99%

“…In any material, if there is an interface with a temperature gradient, then an thermoelectric current will be generated in a closed loop based on the Seebeck effect [31], and thus F TEMF will be produced by the interaction between the current and the imposed magnetic field. Supposing that there is a magnetic field gradient, the magnetic force will be generated by the interaction between the applied magnetic field gradient and the magnetization of the material [32]. In these cases, a segregation or separation of diverse phases may be expected.…”

Section: Introductionmentioning

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: Magnetic Forcementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solidification of Immiscible Alloys under High Magnetic Field: A Review

Chen

Wang

et al. 2021

Metals

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“…Another interesting reference object is the bulge cluster NGC 6712 at [Fe/H]=−1.01 dex (Yong et al 2008). This object has lost a considerable amount of its mass as manifested in its mass and luminosity functions (de Marchi et al 1999).…”

Section: Comparison With Other Clustersmentioning

confidence: 99%

Galactic Pal-eontology: abundance analysis of the disrupting globular cluster Palomar 5

Koch

Côté

2017

A&A

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We present a chemical abundance analysis of the tidally disrupted globular cluster (GC) Palomar 5. By co-adding high-resolution spectra of 15 member stars from the cluster's main body, taken at low signal-to-noise with the Keck/HIRES spectrograph, we were able to measure integrated abundance ratios of 24 species of 20 elements including all major nucleosynthetic channels (namely the light element Na; α-elements Mg, Si, Ca, Ti; Fe-peak and heavy elements Sc, V, Cr, Mn, Co, Ni, Cu, Zn; and the neutron-capture elements Y, Zr, Ba, La, Nd, Sm, Eu). The mean metallicity of −1.56 ± 0.02 ± 0.06 dex (statistical and systematic errors) agrees well with the values from individual, low-resolution measurements of individual stars, but it is lower than previous high-resolution results of a small number of stars in the literature. Comparison with Galactic halo stars and other disrupted and unperturbed GCs renders Pal 5 a typical representative of the Milky Way halo population, as has been noted before, emphasizing that the early chemical evolution of such clusters is decoupled from their later dynamical history. We also performed a test as to the detectability of light element variations in this co-added abundance analysis technique and found that this approach is not sensitive even in the presence of a broad range in sodium of ∼0.6 dex, a value typically found in the old halo GCs. Thus, while methods of determining the global abundance patterns of such objects are well suited to study their overall enrichment histories, chemical distinctions of their multiple stellar populations is still best obtained from measurements of individual stars.

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“…Design and fabrication of FGMs with continuous distribution of composition and microstructure is the focus of research and application. Many valuable methods have been tried to prepare FGMs, such as friction stir processing (Hangai et al, 2012), electrophoretic deposition process (Carvalho et al, 2016), powder metallurgy process (Mahamood and Akinlabi, 2015), centrifugal casting method (Siddhartha et al, 2011), and also magnetic field treatment (Dong et al, 2016). Our group prepared Ni/ZrO 2 FGMs by casting method in gradient magnetic field several years ago (Peng et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Fabrication, Microstructure and Properties of Nickel/Epoxy Resin Functionally Graded Materials With Magnetic-Field-Driving Method

Zhan

Chang

2021

Front. Mater.

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Functionally graded materials are attracting more attentions because of the continuously varying properties in different locations. How to design and fabricate FGMs has become a key and difficult point. In this paper, a magnetic-field-driving method is developed to prepare Ni/epoxy resin FGMs by moving a narrow magnetic field from one end of the sample to the other end with the moving direction perpendicular to the field direction. Ni follows the moving of the magnetic field, and a gradient distribution is obtained. The composition gradients are influenced by Ni content, moving velocity, and also cycle times. The results illustrate that this magnetic-field-driving method is an effective way to prepare FGMs, which is very promising into scientific and technological applications.

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In situ preparation of symmetrically graded microstructures by solidification in high-gradient magnetic field after melt and partial-melt processes

Cited by 15 publications

References 24 publications

Solidification of Immiscible Alloys under High Magnetic Field: A Review

Solidification of Immiscible Alloys under High Magnetic Field: A Review

Galactic Pal-eontology: abundance analysis of the disrupting globular cluster Palomar 5

Fabrication, Microstructure and Properties of Nickel/Epoxy Resin Functionally Graded Materials With Magnetic-Field-Driving Method

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