Formation of icosahedral phase by solid-state diffusion of alternating thin layers
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Thin alternating layers of Al-Cr were produced by sputtering. Heat treatment transforms them to the icosahedral phase. The effect of the layer thickness on their ability to transform to single-phase icosahedral film was examined and it was found that very thin alternating layers react completely to form a single icosahedral phase, while heat treatment of thicker layers always produced the icosahedral phase with residual aluminium. An attempt has been made to explain the results based on the crystallographic structure of the icosahedral phase.
KeywordsPolymer Aluminium Heat Treatment Thin Layer Layer Thickness
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