Abstract
A decagonal quasicrystal alloy Al72Ni12Co16 was melted by containerless processing and chilled on copper and glass substrates in an electromagnetic facility. X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) techniques were adopted to investigate the microstructure and the phase composition. All chilled samples were composed of a decagonal quasicrystal. The sample chilled on the copper showed facet morphology and grew in a lateral growth mode at the direction of two-fold axis, while the one chilled on the glass grew in a continuous pattern along the ten-fold direction. The experimental results were consistent with the prediction of Toner’s theoretical atomic growth model.
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