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Simulation of Atypical Dendrite Growth in Ni–Cu Binary Alloy with Phase-Field Method

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Two dimensional non-facet formations during 110 dendrites growth of Ni–Cu binary alloy are simulated with a phase-field model. The gradient terms for both phase field and solute field are considered in the model. The finite difference method is adopted with uniform grid, and the C Programming Code is implemented to complete the phase-field simulation. We focus on effect of the interface kinetics coefficient on dendritic morphology, tip operating state and concentration profile across the liquid–solid interface. The simulation results indicate that the symmetry of crystal growth does not depend on the kinetics coefficient without flow. With increasing of kinetics coefficient, the steady-state dendrite tip velocities increase accordingly, and the level of solute trapping is severe. The crystal growth patterns are formed including a sector form and a plate formation, but the symmetry of dendrite morphology is not disrupted.
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Keywords: 110 DENDRITE GROWTH; PHASE-FIELD METHOD; SOLUTE DISTRIBUTION; TIP OPERATING STATE

Document Type: Research Article

Publication date: September 1, 2012

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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