Three-dimensional F quasilattice model of decoration for Al─Cu─Fe icosahedral alloys

Lann, A. Le

doi:10.1080/13642819208207666

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…Insertion of the {3, 3, 5} and {5, 3, 3} polytopes into the E 8 root lattices ensures the possibility of 'lifting' 3D atomic coordinates of our model into the 6D lattice. A similar construction has been elaborated by Le Lann [32], where the hierarchical model of the IQC Al-Cu-Fe was inserted into the D 6 lattice, that model was formed by concentric shells (dodecahedronicosidodecahedron-rhombicosidodecahedron, icosidodecahedron formed by rhombicosidodecahedra etc).…”

Section: Discussionmentioning

confidence: 99%

Model for the transformation of an icosahedral phase into a B2 crystalline phase

Крапошин

Талис

Lam

et al. 2008

J. Phys.: Condens. Matter

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A model for the transformation of an Al-Cu-Fe icosahedral quasicrystal into a crystal with a B2-type phase is proposed. The model is based on two assumptions: (1) the main building block for the quasicrystal structure is a hierarchical dodecahedron composed of two icosahedral clusters, coinciding with two different sections of the {3, 3, 5} polytope; (2) the transformation of the quasicrystal into a B2-type crystal phase can be described as the transition between 3D sections of two polytopes, namely {3, 3, 5} and {3, 4, 3}. In the framework of the proposed model, two experimental facts gain plausible explanations: the transformation of the Al-Cu-Fe quasicrystal into the BCC phase specifically and the orientational relationships observed between this BCC phase and the initial icosahedral quasicrystal.

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Section: Discussionmentioning

confidence: 99%

Model for the transformation of an icosahedral phase into a B2 crystalline phase

Крапошин

Талис

Lam

et al. 2008

J. Phys.: Condens. Matter

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“…Five-fold and three-fold planes are perpendicular to the A 5 and A 3 axes. Each two-fold axis bears nodes belonging to only one sublattice [11]; this allows a simple description of the cubic cells.…”

Section: Translation Defectsmentioning

confidence: 99%

Structural transformation from the AlCuFe icosahedral phase to the 1/1 cubic (AlSi)CuFe approximant phase; three dimensional models of translation defects

Lann

Devaud

2000

Eur. Phys. J. B

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Unusual results are obtained by High Resolution Electron Microscopy (HREM) studies of the 1/1 cubic approximant phase of the (AlSi)CuFe icosahedral phase. We study, in a 3D model of AlCuFe icosahedral phase, the possibilities of transformation of this structure into a periodic cubic structure. We propose a model of transformation coherent with the experimental results. PACS. 61.64.Br Quasicrystals

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“…Recent models were devised for the i-Al 63 Cu 25 Fe 12 phase [9,10], based upon neutron diffraction experiments [2]. These models correctly account for the intensities diffracted by a 'perfect' Al 63 Cu 25 Fe 12 quasicrystal, grown at 860 • C from a partially molten alloy [2].…”

Section: Atomic Sites In I-alcufementioning

confidence: 99%

The Au-substituted Al - Cu - Fe icosahedral phase: evidence for bond hybridization

Popescu

Macovei

Manciu

et al. 1997

J. Phys.: Condens. Matter

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Au-substituted Al-Cu-Fe icosahedral phases, Al 62 Cu 25.5−x Au x Fe 12.5 (x 7), were prepared by melt spinning. EDS data showed that Cu as well as Al atoms are effectively substituted for with Au. The hypercubic lattice parameter of as-quenched samples slowly increases with x, while phonon-and phason-type disorders are not affected by Au substitution. Experimental structure factors for 'sum' lines were used to derive an average radius of the atomic hypersurfaces. Comparison of experimental versus calculated ratios of structure factors for different models yielded information about the Au distribution over the icosahedral sites. It was inferred that a fraction of the gold shapes its Al surrounding in a AuAl 2-type configuration. Evidence was found for d-sp hybridization of Au-Al bonds, on the basis of the 'white-line' area at the Au L 3 absorption edge.

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Three-dimensional F quasilattice model of decoration for Al─Cu─Fe icosahedral alloys

Cited by 6 publications

References 15 publications

Model for the transformation of an icosahedral phase into a B2 crystalline phase

Model for the transformation of an icosahedral phase into a B2 crystalline phase

Structural transformation from the AlCuFe icosahedral phase to the 1/1 cubic (AlSi)CuFe approximant phase; three dimensional models of translation defects

The Au-substituted Al - Cu - Fe icosahedral phase: evidence for bond hybridization

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