Gille, Peter; Dreier, P.; Gräber, M.; Scholpp, T.
Large single-grain AlCoNi quasicrystals grown by the Czochralski method.
In: Journal of Crystal Growth, Vol. 207, Nr. 1: S. 95-101
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The single crystal growth of decagonal quasicrystals in the Al-Co-Ni system has been investigated using the Czochralski method. Using a ceramic tip instead of a native seed, single-grain quasicrystals of average composition Al71Co18Ni11 and approximately 1 cm3 in size have been grown. Very low pulling rates (0.25-0.5 mm/h) were used. Axial segregation and structural perfection were investigated by electron-probe microanalysis and neutron diffraction. The liquidus temperature of the starting melt and composition of the decagonal phase agree well with the published phase diagram data.