Preparation of a decagonal Al-Cu-Co single quasicrystal by the Czochralski method

Yoshihiko Yokoyama; Ryunosuke Note; Atsushi Yamaguchi; Akihisa Inoue; Kenzo Fukaura; Hisakichi Sunada

doi:10.2320/matertrans1989.40.123

Preparation of a decagonal Al-Cu-Co single quasicrystal by the Czochralski method

Yoshihiko Yokoyama, Ryunosuke Note, Atsushi Yamaguchi, Akihisa Inoue, Kenzo Fukaura, Hisakichi Sunada

Research output: Contribution to journal › Article › peer-review

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Abstract

Production of several phase diagrams including a decagonal(d)-phase in Al-Cu-Co alloy system was investigated to reveal the composition of the liquid in equilibrium with the stoichiometric Al₆₅Cu₁₅Co₂₀ d-phase as objective phase. The d-quasicrystal is only formed through the peritectic reaction between primary crystalline cubic phase and liquid phase. In order to avoid the peritectic reaction, the molten alloy composition was collected Al_63.9Cu_28.2Co_7.9 in the crucible which composition equilibrates to the Al₆₅Cu₁₅Co₂₀ d-solid phase at 1173 K with the condition of the Czochralski method. As a result, we have succeeded in the production of a single decagonal quasicrystal, 30 mm in length and 1 to 5 mm in diameter, with a mean composition of about Al₆₅Cu₁₅Co₂₀.

Original language	English
Pages (from-to)	123-131
Number of pages	9
Journal	Materials Transactions, JIM
Volume	40
Issue number	2
DOIs	https://doi.org/10.2320/matertrans1989.40.123
Publication status	Published - 1999
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)

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abstract = "Production of several phase diagrams including a decagonal(d)-phase in Al-Cu-Co alloy system was investigated to reveal the composition of the liquid in equilibrium with the stoichiometric Al65Cu15Co20 d-phase as objective phase. The d-quasicrystal is only formed through the peritectic reaction between primary crystalline cubic phase and liquid phase. In order to avoid the peritectic reaction, the molten alloy composition was collected Al63.9Cu28.2Co7.9 in the crucible which composition equilibrates to the Al65Cu15Co20 d-solid phase at 1173 K with the condition of the Czochralski method. As a result, we have succeeded in the production of a single decagonal quasicrystal, 30 mm in length and 1 to 5 mm in diameter, with a mean composition of about Al65Cu15Co20.",

author = "Yoshihiko Yokoyama and Ryunosuke Note and Atsushi Yamaguchi and Akihisa Inoue and Kenzo Fukaura and Hisakichi Sunada",

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T1 - Preparation of a decagonal Al-Cu-Co single quasicrystal by the Czochralski method

AU - Yokoyama, Yoshihiko

AU - Note, Ryunosuke

AU - Yamaguchi, Atsushi

AU - Inoue, Akihisa

AU - Fukaura, Kenzo

AU - Sunada, Hisakichi

PY - 1999

Y1 - 1999

N2 - Production of several phase diagrams including a decagonal(d)-phase in Al-Cu-Co alloy system was investigated to reveal the composition of the liquid in equilibrium with the stoichiometric Al65Cu15Co20 d-phase as objective phase. The d-quasicrystal is only formed through the peritectic reaction between primary crystalline cubic phase and liquid phase. In order to avoid the peritectic reaction, the molten alloy composition was collected Al63.9Cu28.2Co7.9 in the crucible which composition equilibrates to the Al65Cu15Co20 d-solid phase at 1173 K with the condition of the Czochralski method. As a result, we have succeeded in the production of a single decagonal quasicrystal, 30 mm in length and 1 to 5 mm in diameter, with a mean composition of about Al65Cu15Co20.

AB - Production of several phase diagrams including a decagonal(d)-phase in Al-Cu-Co alloy system was investigated to reveal the composition of the liquid in equilibrium with the stoichiometric Al65Cu15Co20 d-phase as objective phase. The d-quasicrystal is only formed through the peritectic reaction between primary crystalline cubic phase and liquid phase. In order to avoid the peritectic reaction, the molten alloy composition was collected Al63.9Cu28.2Co7.9 in the crucible which composition equilibrates to the Al65Cu15Co20 d-solid phase at 1173 K with the condition of the Czochralski method. As a result, we have succeeded in the production of a single decagonal quasicrystal, 30 mm in length and 1 to 5 mm in diameter, with a mean composition of about Al65Cu15Co20.

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Preparation of a decagonal Al-Cu-Co single quasicrystal by the Czochralski method

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