Preparation of Decagonal Al-Ni-Co Single Quasicrystal by Czochralski Method
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We constructed a partial isothermal phase diagram including a decagonal (d-) phase in the Al–Ni–Co system and determined the composition of the liquid in equilibrium with the stoichiometric d-phase. The d-phase is formed through a peritectic reaction between the B2 phase and the liquid phase. A seed d-phase prepared by selecting an optimum composition of the liquid phase was used for growing a large-scale d-quasicrystal by the Czochralski method. As a result, we have product a single decagonal quasicrystal with the size of 60 mm in length and 1 to 7 mm in diameter and the mean composition of Al<SUB>72.2</SUB>Ni<SUB>12.1</SUB>Co<SUB>15.7</SUB>.
- MATERIALS TRANSACTIONS
MATERIALS TRANSACTIONS 38(11), 943-949, 1997-11
The Japan Institute of Metals