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High-resolution electron microscopy of Al–Ni–Fe decagonal quasicrystal

Published online by Cambridge University Press:  31 January 2011

Kenji Hiraga
Affiliation:
Institute for Materials Research, Tohoku University, Katahira, Aoba-ku, Sendai 980, Japan
Kunio Yubuta
Affiliation:
Institute for Materials Research, Tohoku University, Katahira, Aoba-ku, Sendai 980, Japan
Ki-Tae Park
Affiliation:
Institute for Materials Research, Tohoku University, Katahira, Aoba-ku, Sendai 980, Japan
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Abstract

The structure of a stable decagonal quasicrystal with 0.4 nm periodicity, formed in a conventionally solidified alloy with composition Al71.6Ni23.7Fe4.7, was investigated by high-resolution electron microscopy. It was found that this decagonal phase is one of the best-ordered quasicrystals, without any detectable linear phason strain and with only weak random phason strain. The structure is interpreted as an aperiodic tiling of decagonal atom columns with a diameter of about 1.2 nm. The atomic arrangements in special local regions are discussed on the basis of computer simulations.

Type
Articles
Copyright
Copyright © Materials Research Society 1996

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References

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