Effects of interphase boundary anisotropy on the three-phase growth dynamics in the β(In) – In<sub>2</sub>Bi – γ(Sn) ternary-eutectic system

Mohagheghi, Samira; Hecht, U.; Bottin-Rousseau, Sabine; Akamatsu, Silvère; Faivre, G; Şerefoğlu, Melis

doi:10.1088/1757-899x/529/1/012010

Cited by 11 publications

(11 citation statements)

References 8 publications

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“…[32], could be used so that the 2Dto-3D transition could be avoided at larger velocities. Among other prospects, the thin-sample solidification methodology could be also extended to three-phased growth microstructures in Al-based alloys [54,55]. Finally, the present study may provide fundamental hints for a practical endeavor aiming at developing new meth-ods for the control of textures in directionally solidified eutectic materials that present several types of ORs.…”

Section: Discussionmentioning

confidence: 83%

Locked-lamellar eutectic growth in thin Al-Al2Cu samples: In situ directional solidification and crystal orientation analysis

Bottin-Rousseau

Medjkoune

Senninger

et al. 2021

Journal of Crystal Growth

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We investigated the directional-solidification dynamics of slightly hypoeutectic Al-Al 2 Cu alloys in thin samples. Our goal was to establish a link between the growth of locked, tilted-lamellar patterns and the crystal orientation relationship (OR) between the Al-rich solid solution α and the Al 2 Cu intermetallic θ, as well as to gain information on the OR-dependent anisotropy of the surface energy γ of the α-θ interphase boundaries. Thin Al-Al 2 Cu films of thickness of 13 ± 2 µm were prepared by plasma sputtering. During solidification at pulling velocities between 0.05 and 0.5 µms −1 , the coupled-growth front was observed in situ with a long-distance optics. The growth of millimeter-sized eutectic grains was thus followed in real time during transient and steady-state regimes. The orientation of α and θ crystals was measured ex situ by x-ray diffraction and electron backscattering diffraction. In several eutectic grains, a {123} α plane and a {100} θ plane were found to be closely parallel to each other. These coincident planes define a new family of (type-C) ORs in the Al-Al 2 Cu eutectic, which are distinct from the prevailing ORs that have been previously identified in bulk samples. Crucially, the inclination of the lamellae was systematically close to that of a {100} θ lattice plane, which therefore corresponds to a deep γ minimum in eutectic grains with a type-C OR, or a neighbor one. We initiated a discussion on the selection of the OR, the formation of "stray" eutectic grains, and the lamellar-growth dynamics at eutectic-grain boundaries.

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Section: Discussionmentioning

confidence: 83%

Locked-lamellar eutectic growth in thin Al-Al2Cu samples: In situ directional solidification and crystal orientation analysis

Bottin-Rousseau

Medjkoune

Senninger

et al. 2021

Journal of Crystal Growth

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“…With the development of eutectic solidification theory and research methods, the importance of interfacial energy anisotropy on tilted eutectics is well recognized. [7,[25][26][27][28][29][30][31][32][33][34] From the in-situ directional solidification experiments of transparent alloys, Caroli et al [25] found that the tilted growth of lamellae and symmetry reflection of the solid-liquid interface front profile are broken, induced by interfacial energy anisotropies. Having made further theoretical analysis, they concluded that the anisotropy of solid-solid interface energy attempts to tilt lamellae into the orientation with the lowest α/β interface energy, while the anisotropy of solid-liquid interface energy may modify the pinning angle for α phase and β phase at triple points.…”

Section: Introductionmentioning

confidence: 99%

Effect of interface anisotropy on tilted growth of eutectics: A phase field study

Jiang

Wang

et al. 2022

Chinese Phys. B

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Interfacial energy anisotropy plays an important role in tilted growth of eutectics. However, previous studies mainly focused on the solid-solid interface energy anisotropy, whether the solid-liquid interface energy anisotropy can significantly affect tilted growth of eutectics remains unclear. In this study, a multi-phase field model was employed to investigate both the effects of solid-liquid and solid-solid interfacial energy anisotropies on tilted growth of eutectics. The findings revealed that both the solid-liquid and the solid-solid interfacial energy anisotropies can induce tilted growth of eutectics. The results also demonstrated that when the rotation angle is within the range of 30°~ 60°, the growth of tilted eutectics is governed jointly by the solid-solid and solid-liquid interfacial energy anisotropies; otherwise, it is mainly controlled by the solid-solid interfacial energy anisotropy. Further analysis showed that, the unequal pinning angles at triple points caused by the adjustment of the force balance results in different solute-diffusion rates on both sides of triple points. This will further induce an asymmetrical concentration distribution along the pulling direction near the solidliquid interface and the tilted growth of eutectics. Our findings not only shed light on the formation mechanism of tilted eutectics but also provide theoretical guidance for controlling the microstructure evolution during eutectic solidification.

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“…Similar to binary eutectic alloys several experimental studies have been conducted on three-phase eutectic alloys, that include Ag-Al-Cu [16][17][18][19][20][21][22], In-Bi-Sn [23][24][25][26][27][28][29][30], Sn-Ag-Cu [31],…”

Section: Introductionmentioning

confidence: 99%

Role of interfacial energy and liquid diffusivities on pattern formation during thin-film three-phase eutectic growth

Khanna,

Choudhury

2021

Preprint

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In this paper, we investigate three-phase eutectic growth during thin-film directional solidification of a model symmetric ternary eutectic alloy. In contrast to two-phase eutectics that have only a single possibility, αβαβ . . ., as the growth pattern, during three-phase eutectic growth infinite possibilities exist. Here, we explore the possible existence of pattern selection influenced by the change in the solid-solid interfacial energies and the diffusivities. We begin the study by estimating the undercooling vs. spacing variation for the simplest possible configurations of pattern lengths 3 and 4, where phase-field simulations are utilized to quantify the influence of the solidsolid interfacial energy and the contrast in the component diffusivities. Subsequently, extended simulations consisting of multiple periods of αβδ . . . as well as αβδβ . . . are carried out for assessing the stability of the configurations to long-wavelength perturbations in spacing. Thereafter, growth competition among the simplest patterns is investigated through phase-field simulations of coupled growth of configurations of the type [αβδ] m [αβδβ] n , (m,n) being the respective number of periods. Finally, pattern selection is studied by initializing with random initial configurations and classifying the emerging patterns based on the phase sequences. The principal finding is that, while there is no strong phase selection, between the solid-solid interfacial energies and the contrast in the component diffusivities, we find the latter to strongly influence pattern morphology.

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Effects of interphase boundary anisotropy on the three-phase growth dynamics in the β(In) – In₂Bi – γ(Sn) ternary-eutectic system

Cited by 11 publications

References 8 publications

Locked-lamellar eutectic growth in thin Al-Al2Cu samples: In situ directional solidification and crystal orientation analysis

Locked-lamellar eutectic growth in thin Al-Al2Cu samples: In situ directional solidification and crystal orientation analysis

Effect of interface anisotropy on tilted growth of eutectics: A phase field study

Role of interfacial energy and liquid diffusivities on pattern formation during thin-film three-phase eutectic growth

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Effects of interphase boundary anisotropy on the three-phase growth dynamics in the β(In) – In2Bi – γ(Sn) ternary-eutectic system

Cited by 11 publications

References 8 publications

Locked-lamellar eutectic growth in thin Al-Al2Cu samples: In situ directional solidification and crystal orientation analysis

Locked-lamellar eutectic growth in thin Al-Al2Cu samples: In situ directional solidification and crystal orientation analysis

Effect of interface anisotropy on tilted growth of eutectics: A phase field study

Role of interfacial energy and liquid diffusivities on pattern formation during thin-film three-phase eutectic growth

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Effects of interphase boundary anisotropy on the three-phase growth dynamics in the β(In) – In₂Bi – γ(Sn) ternary-eutectic system