The structure of an Al-Co-Ni crystalline approximant with an ordered arrangement of atomic clusters with pentagonal symmetry

K. Hiraga; T. Ohsuna; K. Yubuta; S. Nishimura

doi:10.2320/matertrans.42.897

The structure of an Al-Co-Ni crystalline approximant with an ordered arrangement of atomic clusters with pentagonal symmetry

K. Hiraga, T. Ohsuna, K. Yubuta, S. Nishimura

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

11 Citations (Scopus)

Abstract

The structure of a crystalline approximant (called "PD_3c phase") in an Al_71.5Co₁₆Ni_12.5 alloy annealed at 900°C for 120 h has been studied by high-angle annular detector scanning transmission electron microscopy (HAADF-STEM) and high-resolution transmission electron microscopy (HREM). The PD_3c phase has an orthorhombic structure with lattice parameters a = 5.2 nm, b = 0.4 nm and c = 3.7 nm, and the space group of Pmn2₁ (No. 31). Its structure is characterized as an ordered arrangement of columnar atom clusters with pentagonal symmetry, and can be interpreted as a crystalline approximant related to an ordered decagonal quasicrystal formed by the projection of a NaCl-type hypercubic lattice.

Original language	English
Pages (from-to)	897-900
Number of pages	4
Journal	Materials Transactions
Volume	42
Issue number	5
DOIs	https://doi.org/10.2320/matertrans.42.897
Publication status	Published - 2001
Externally published	Yes

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.2320/matertrans.42.897

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abstract = "The structure of a crystalline approximant (called {"}PD3c phase{"}) in an Al71.5Co16Ni12.5 alloy annealed at 900°C for 120 h has been studied by high-angle annular detector scanning transmission electron microscopy (HAADF-STEM) and high-resolution transmission electron microscopy (HREM). The PD3c phase has an orthorhombic structure with lattice parameters a = 5.2 nm, b = 0.4 nm and c = 3.7 nm, and the space group of Pmn21 (No. 31). Its structure is characterized as an ordered arrangement of columnar atom clusters with pentagonal symmetry, and can be interpreted as a crystalline approximant related to an ordered decagonal quasicrystal formed by the projection of a NaCl-type hypercubic lattice.",

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T1 - The structure of an Al-Co-Ni crystalline approximant with an ordered arrangement of atomic clusters with pentagonal symmetry

AU - Hiraga, K.

AU - Ohsuna, T.

AU - Yubuta, K.

AU - Nishimura, S.

PY - 2001

Y1 - 2001

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AB - The structure of a crystalline approximant (called "PD3c phase") in an Al71.5Co16Ni12.5 alloy annealed at 900°C for 120 h has been studied by high-angle annular detector scanning transmission electron microscopy (HAADF-STEM) and high-resolution transmission electron microscopy (HREM). The PD3c phase has an orthorhombic structure with lattice parameters a = 5.2 nm, b = 0.4 nm and c = 3.7 nm, and the space group of Pmn21 (No. 31). Its structure is characterized as an ordered arrangement of columnar atom clusters with pentagonal symmetry, and can be interpreted as a crystalline approximant related to an ordered decagonal quasicrystal formed by the projection of a NaCl-type hypercubic lattice.

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The structure of an Al-Co-Ni crystalline approximant with an ordered arrangement of atomic clusters with pentagonal symmetry

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