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Large single-grain AlCoNi quasicrystals grown by the Czochralski method

Journal of Crystal Growth 207(1-2): 95-101

Autoren/Herausgeber: Gille P
Dreier P
Graber M
Scholpp T
Erschienen: 1999

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 cm(3) 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. (C) 1999 Elsevier Science B.V. All rights reserved.