New stable icosahedral al-cu-ru and al-cu-os alloys

An Pang Tsai; Akihisa Inoue; Tsuyoshi Masumoto

doi:10.1143/JJAP.27.L1587

New stable icosahedral al-cu-ru and al-cu-os alloys

An Pang Tsai, Akihisa Inoue, Tsuyoshi Masumoto

Center for Exploration of New Inorganic Materials

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

190 Citations (Scopus)

Abstract

A thermodynamically stable quasi-crystalline single phase with an icosahedral structure was found to be formed at atomic compositions of Al₆₅Cu₂₀Ru₁₅ and Al₆₅Cu₂₀Os₁₅ in conventionally solidified and fully annealed states as well as in a rapidly solidified state. The quasi-crystalline nature determined by X-ray diffractometry is the highest for the fully annealed ingot, indicating the existence of a truly equilibrium icosahedral structure. The stable quasi-crystals appear to have a growth morphology of pentagonal dodecahedron with an average size of 0.03 mm in a fully annealed state.

Original language	English
Pages (from-to)	L1587-L1590
Journal	Japanese journal of applied physics
Volume	27
Issue number	9 A
DOIs	https://doi.org/10.1143/JJAP.27.L1587
Publication status	Published - 1988 Sep

Keywords

Al-Cu-Os system
Al-Cu-Ru system
Growth morphology
Icosahedral alloy
Neutron diffraction
Pentagonal dodecahedron
Stable quasi-crystal

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "New stable icosahedral al-cu-ru and al-cu-os alloys",

abstract = "A thermodynamically stable quasi-crystalline single phase with an icosahedral structure was found to be formed at atomic compositions of Al65Cu20Ru15 and Al65Cu20Os15 in conventionally solidified and fully annealed states as well as in a rapidly solidified state. The quasi-crystalline nature determined by X-ray diffractometry is the highest for the fully annealed ingot, indicating the existence of a truly equilibrium icosahedral structure. The stable quasi-crystals appear to have a growth morphology of pentagonal dodecahedron with an average size of 0.03 mm in a fully annealed state.",

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year = "1988",

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T1 - New stable icosahedral al-cu-ru and al-cu-os alloys

AU - Tsai, An Pang

AU - Inoue, Akihisa

AU - Masumoto, Tsuyoshi

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N2 - A thermodynamically stable quasi-crystalline single phase with an icosahedral structure was found to be formed at atomic compositions of Al65Cu20Ru15 and Al65Cu20Os15 in conventionally solidified and fully annealed states as well as in a rapidly solidified state. The quasi-crystalline nature determined by X-ray diffractometry is the highest for the fully annealed ingot, indicating the existence of a truly equilibrium icosahedral structure. The stable quasi-crystals appear to have a growth morphology of pentagonal dodecahedron with an average size of 0.03 mm in a fully annealed state.

AB - A thermodynamically stable quasi-crystalline single phase with an icosahedral structure was found to be formed at atomic compositions of Al65Cu20Ru15 and Al65Cu20Os15 in conventionally solidified and fully annealed states as well as in a rapidly solidified state. The quasi-crystalline nature determined by X-ray diffractometry is the highest for the fully annealed ingot, indicating the existence of a truly equilibrium icosahedral structure. The stable quasi-crystals appear to have a growth morphology of pentagonal dodecahedron with an average size of 0.03 mm in a fully annealed state.

KW - Al-Cu-Os system

KW - Al-Cu-Ru system

KW - Growth morphology

KW - Icosahedral alloy

KW - Neutron diffraction

KW - Pentagonal dodecahedron

KW - Stable quasi-crystal

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