Crystal Growth Of A Decagonal AI-Co-Ni Quasicrystal
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<jats:title>Abstract</jats:title><jats:p>We have grown a decagonal single quasicrystal with a size of centimeter order in an A1<jats:sub>72</jats:sub>Co<jats:sub>16</jats:sub>Ni<jats:sub>12</jats:sub> alloy by floating zone method at a growth rate of 0.5 mm/h. The single decagonal quasicrystal has been inspected by Laue X-ray as well as neutron diffraction, revealing a very high quasicrystalline quality. By quenching the liquid during growth, a flat solid-liquid interface has been directly observed. There exists solute redistribution at the growing solid-liquid interface. At steady state growth Al is enriched and Co, Ni are depleted in front of solid-liquid interface. Solute partition ratios of Al, Co and Ni were determined to be about 0.91, 1.57 and 1.08, respectively.</jats:p>
収録刊行物
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- MRS Proceedings
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MRS Proceedings 553 1998-01-01
Springer Science and Business Media LLC