Search Results - "Gratias, D"

Identification of the atomic structure of the fivefold surface of an icosahedral Al-Pd-Mn quasicrystal: helium diffraction and scanning tunneling microscopy studies by Barbier, L, Le Floc'h, D, Calvayrac, Y, Gratias, D

“…High resolution He diffraction and scanning tunneling microscopy images of the fivefold surface of a single-grain i-AlPdMn quasicrystal are obtained showing an…”
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Structures of quasicrystals: Where are the atoms? by Gratias, D., Quiquandon, M.

“…This paper is an attempt to present a chronological review of the structural concepts that have been developed to characterize quasicrystals, starting from the…”
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Dislocation climb in icosahedral quasicrystals by Caillard, D, Mompiou, F, Bresson, L, Gratias, D

“…We discuss here some arguments in favor of climb being the dominant mode of dislocation motion responsible for the plastic deformation of icosahedral…”
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Dislocation motions in 5-fold planes of icosahedral Al-Pd-Mn by Caillard, D., Roucau, C., Bresson, L., Gratias, D.

“…Dislocations moving in 5-fold planes of icosahedral AlPdMn have been observed in in situ heating TEM experiments. Similar dislocations forming a deformation…”
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A brief survey of quasicrystallography by Gratias, D.

“…We describe some main basic crystallographic tools used for characterizing the atomic structures of idealized quasicrystals…”
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Metallic Phase with Long-Range Orientational Order and No Translational Symmetry by Shechtman, D, Blech, I, Gratias, D, Cahn, J W

“…A metallic solid (Al--14 at.% Mn) with long-range orientational order, but with icosahedral point group symmetry, which is inconsistent with lattice…”
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Simulations of high-resolution electron microscopy images of icosahedral quasicrystals by Quiquandon, M., Beauchesne, J.-T., Gratias, D.

“…We apply the scattering matrix formulation for calculating the images of high-resolution electron microscopy (HREM) images of quasiperiodic crystals and…”
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Geometry of dislocations in icosahedral quasicrystals by Gratias, D., Beauchesne, J. T., Mompiou, F., Caillard, D.

“…Quasicrystals are complex metallic alloys that are ductile at high temperatures close to their melting point. It has been early recognized that their…”
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X-ray diffraction study of the 5-fold plane surface of a Al70.4Pd21.4Mn8.2 single-grain by Capitan, M.J, Calvayrac, Y, Gratias, D, Alvarez, J

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Quasicrystals: A New Kind of Ordered Solids by Gratias, D

“…The various approaches proposed so far to describe the atomic structure of quasicrystals are discussed together with some of the descriptions of the newly…”
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Indexing approximants of icosahedral quasicrystals by Quiquandon, M., Katz, A., Puyraimond, F., Gratias, D.

“…It is well known that the crystallography of approxi­mants is directly related to that of the parent quasicrystal, once its unit‐cell vectors are identified as…”
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Atomic structure of the cubic 1/1 approximant α-(Al,Si)CuFe by Puyraimond, F., Tillard, M., Belin, C., Quiquandon, M., Gratias, D., Quivy, A., Calvayrac, Y.

“…A X-ray diffraction structural analysis has been performed on single crystals of the α-(Al, Si)CuFe cubic 1/1 approximant of the parent icosahedral phase…”
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Neutron-diffraction study of icosahedral Al-Cu-Fe single quasicrystals by CORNIER-QUIQUANDON, M, QUIVY, A, LEFEBVRE, S, ELKAIM, E, HEGER, G, KATZ, A, GRATIAS, D

“…Neutron-diffraction results on a single icosahedral quasicrystal of Al sub 63 Cu sub 25 Fe sub 12 are reported. The basic properties of the structure have been…”
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Short-range order in electron-irradiated Cu-Pd: fluctuations in a nonequilibrium steady state by KULIK, J, GRATIAS, D, DE FONTAINE, D

“…We present electron diffraction results on specimens of Cu-Pd alloys under irradiation with 1.5-MeV electrons at temperatures from 200 to 400 K. The…”
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SPATIAL ORDER AND DIFFRACTION IN QUASICRYSTALS AND BEYOND by Gratias, Denis, Bresson, Lionel, Quiquandon, Marianne

“…▪ Abstract  This review is an introduction to the problem of determining the nature of the diffraction spectra of ordered solids. After explicit computation…”
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High resolution scanning tunneling microscopy studies of quasicrystal surfaces: an efficient tool to investigate quasiperiodic atomic structures by Barbier, Luc, Gratias, Denis

“…High resolution scanning tunneling microscopy (HRSTM) images of i-Al–Pd–Mn reveal wide flat terraces along the 5-fold (5f) direction with quasiperiodic atomic…”
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Dislocation climb in icosahedral quasicrystals: Viewpoint set No.30: Mechanical properties of quasicrystals by CAILLARD, D, MOMPIOU, F, BRESSON, L, GRATIAS, D

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Six-dimensional Fourier analysis of the icosahedral Al73Mn21Si6 alloy by GRATIAS, D, CAHN, J. W, MOZER, B

“…Fourier analysis of X-ray and neutron diffraction data of an icosahedral Al73Mn21Si6 alloy are displayed both as a three-dimensional (3D) quasiperiodic…”
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Patterson Fourier analysis of the icosahedral (Al,Si)-Mn alloy by CAHN, J. W, GRATIAS, D

“…Neutron and absolute X-ray diffraction data obtained from single-phase icosahedral powder Al sub 73 Mn sub 21 Si sub 6 are analyzed using a generalized…”
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Indexing of icosahedral quasiperiodic crystals by Cahn, John W., Shechtman, Dan, Gratias, Denis

“…Since the definition of quasiperiodicity is intimately connected to the indexing of a Fourier transform, for the case of an icosahedral solid, the step…”
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