Modification of icosahedral quasicrystal Al65Cu20Fe15 by 170-MeV 58Ni+12 beam
TL;DR: In this paper, the effect of SHI on icosahedral quasicrystal Al 65 Cu 20 Fe 15 was studied for the first time and the dynamic variation of resistance was studied on-line during and after irradiation.
About: This article is published in Materials Research Bulletin.The article was published on 2001-11-01. It has received 5 citations till now. The article focuses on the topics: Ion beam & Swift heavy ion.
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TL;DR: In this article, the microstructure, fabrication and properties of quasicrystalline Al-Cu-Fe alloys are reviewed from the perspective of materials engineer, aiming at a better understanding of the basic differences between crystalline and non-crystalline materials with respect to structure and properties.
229 citations
21 citations
TL;DR: In this paper, the effect of 100 MeV 58 Ni +8 ion irradiation on the electrical transport behavior of Al-Cu-Fe quasicrystalline thin films have been investigated by in situ and ex situ resistivity measurements.
2 citations
TL;DR: In this article , the authors explored the catalytic action of Al65Cu20Fe15 quasicrystal (QC) on the de/re-hydrogenation study of NaAlH4.
2 citations
TL;DR: In this paper, the effects of irradiation of quasicrystalline targets with swift heavy ions have been discussed in terms of resistivity measurements (i.e., resistivity changes with increasing flux (ions/cm2) and ex-situ resistivity vs temperature measurements before and after irradiation).
Abstract: The present level of understanding of the effects of irradiation of quasicrystalline targets with swift heavy ions has been reviewed here. The results of systematic deposition of large amount of energy densities (12 keV/nm < (dE/dx)e < 40 keV/nm) in Al-Cu-Fe based system are discussed in terms of resistivity measurements (in-situ measurements of resistivity changes with increasing flux (ions/cm2) and ex-situ resistivity vs temperature measurements before and after irradiation) & standard and high-resolution X-ray diffraction measurements made before and after irradiation. The studies are aimed at understanding the changes that may occur in these alloys as a result of the relaxation of such highly excited states of matter. Also, we attempt to learn whether such changes are typical to the long-range quasicrystallinity of the system or not.
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TL;DR: In this article, a metallic solid with long-range orientational order, but with icosahedral point group symmetry, which is inconsistent with lattice translations, was observed and its diffraction spots are as sharp as those of crystals but cannot be indexed to any Bravais lattice.
Abstract: We have observed a metallic solid (Al-14-at.%-Mn) with long-range orientational order, but with icosahedral point group symmetry, which is inconsistent with lattice translations. Its diffraction spots are as sharp as those of crystals but cannot be indexed to any Bravais lattice. The solid is metastable and forms from the melt by a first-order transition.
5,702 citations
TL;DR: In this article, diffraction RX and microscopie electronique en transmission of the structure of quasicristaux Al 65 Cu 20 M 15 fabriques par filage depuis l'etat liquide.
Abstract: Analyse par diffraction RX et microscopie electronique en transmission de la structure des quasicristaux Al 65 Cu 20 M 15 fabriques par filage depuis l'etat liquide. Determination de leur stabilite thermique et de leur conductivite electrique entre 0 et 300 K
95 citations
TL;DR: In this article, the authors show that thin films 3000 A in thickness of the icosahedral AlCuFe phase can be formed by solid state diffusion of sputtered Al, Cu, and Fe layers.
Abstract: We show that thin films 3000 A in thickness of the icosahedral AlCuFe phase can be formed by solid state diffusion of sputtered Al, Cu, and Fe layers. As for bulk materials, we propose that the icosahedral phase grows by diffusion of the Cu in the Al3Fe layer previously formed by interdiffusion of the Al and Fe layers. These films present high resistivity values comparable to those obtained in bulk samples of high structural quality.
65 citations
TL;DR: The measurements show that the Fermi level in a quasicrystal lies in a deep narrow pseudogap 60 meV wide, and above an applied voltage of 50 mV a ${V}^{1/2}$ contribution to the DOS is observed in agreement with electron-electron interaction effects.
Abstract: We present the first experimental determination by tunneling spectroscopy of the density of states (DOS) close to the Fermi energy of AlCuFe quasicrystalline thin film samples. The measurements show that the Fermi level in a quasicrystal lies in a deep narrow pseudogap 60 meV wide. Above an applied voltage of 50 mV a ${V}^{1/2}$ contribution to the DOS is observed in agreement with electron-electron interaction effects.
55 citations
TL;DR: In this paper, powder X-ray diffraction was used to study structural transformations resulting from phason instabilities in icosahedral Al-Cu-Fe using a projection of a distorted cubic six-dimensional lattice.
Abstract: Structural transformations resulting from phason instabilities in icosahedral Al–Cu–Fe have been studied by powder X-ray diffraction. Three approximant phases, the modulated icosahedral phase and a state with substantial phason disorder are located in the phase diagram. Diffraction scans of the transformations are modelled using a projection of a distorted cubic six-dimensional lattice.
38 citations