Electron-beam irradiation effects in Al-Ni-Co decagonal quasicrystal
نویسندگان
چکیده
منابع مشابه
Fermi states and anisotropy of Brillouin zone scattering in the decagonal Al–Ni–Co quasicrystal
Quasicrystals (QCs) are intermetallic alloys that have excellent long-range order but lack translational symmetry in at least one dimension. The valence band electronic structure near the Fermi energy EF in such materials is of special interest since it has a direct relation to their unusual physical properties. However, the Fermi surface (FS) topology as well as the mechanism of QC structure s...
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The adhesion and friction force properties between a tenfold Al‐Ni‐Co decagonal quasicrystal and a titanium nitride (TiN)-coated tip were investigated using an atomic force microscope in ultrahigh vacuum. To suppress the strong chemical adhesion found in the clean quasicrystal surfaces, the sample was exposed to ethylene that formed a protective passivating layer. We show that the deformation m...
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We propose a structural model for decagonal Al-Cu-Co quasicrystals based upon existing experimental diffraction data supplemented by total energy calculations. The model is a decoration of tiles related to the Penrose rhombus tiling. Strong chemical ordering between Cu and Co leads to chains of alternating Cu and Co atoms. These chains project onto tile edges, where they define arrows. At low t...
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The atomic dynamics of decagonal Al-Ni-Co quasicrystals is investigated by molecular dynamics simulations. The model structures used consist of an alternating stacking of two layers, which are decorations of a hexagon-boat-star tiling. Apart from small relaxations, these model structures are essentially stable up to the melting point. Above two thirds of the melting temperature, a large fractio...
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Wahyu Setyawan,1 Nicola Ferralis,2 Renee D. Diehl,2 Milton W. Cole,2 and Stefano Curtarolo1,* 1Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA 2Department of Physics and Materials Research Institute, Penn State University, University Park, Pennsylvania 16802, USA Received 7 December 2005; revised manuscript received 9 May 2006; publ...
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ژورنال
عنوان ژورنال: Microscopy Microanalysis Microstructures
سال: 1993
ISSN: 1154-2799
DOI: 10.1051/mmm:0199300402-3034100