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Crystal Growth Of A Decagonal AI-Co-Ni Quasicrystal

Published online by Cambridge University Press:  10 February 2011

J.Q. Guo ,
T. J. Sato ,
T. Kimura ,
T. Hirano  and
A. P. Tsai
J.Q. Guo
Affiliation:
Aperiodic Solid Research Team, National Research Institute for Metals, 1–2-1 Sengen, Tsukuba, Ibaraki 305–0047, Japan, [email protected] CREST, Japan Science and Technology Corporation
T. J. Sato
Affiliation:
Aperiodic Solid Research Team, National Research Institute for Metals, 1–2-1 Sengen, Tsukuba, Ibaraki 305–0047, Japan, [email protected]
T. Kimura
Affiliation:
Aperiodic Solid Research Team, National Research Institute for Metals, 1–2-1 Sengen, Tsukuba, Ibaraki 305–0047, Japan, [email protected]
T. Hirano
Affiliation:
Aperiodic Solid Research Team, National Research Institute for Metals, 1–2-1 Sengen, Tsukuba, Ibaraki 305–0047, Japan, [email protected]
A. P. Tsai
Affiliation:
Aperiodic Solid Research Team, National Research Institute for Metals, 1–2-1 Sengen, Tsukuba, Ibaraki 305–0047, Japan, [email protected]
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Abstract

We have grown a decagonal single quasicrystal with a size of centimeter order in an A172Co16Ni12 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 553: Symposium LL – Quasicrystals , 1998 , 37
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

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