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Abstract
Effect of boron on iron removal and the feasibility of formation of iron borides in Al melt were studied. The iron composition was not reduced by the addition of boron. Analysis using SEM/EDX and XRD indicated the formation of titanium and vanadium borides in the melt and no iron borides were detected. Thermodynamic calculations proved that iron cannot react with the added boron in the melt to form iron borides under the experimental conditions, and the lowest Fe concentration that can be purified by boron addition is ∼11·7 wt-%.