Explanation of peak shapes observed in diffraction from icosahedral quasicrystals

Explanation of peak shapes observed in diffraction from icosahedral quasicrystals

The distinctive peak shapes observed in diffraction studies of the icosahedral phases of Al--Mn, Al--Li--Cu, and related alloys are shown to arise from a specific configuration of quenched phason strains in a grain. This configuration is determined by considerations of symmetry and continuity of the...

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Veröffentlicht in:Phys. Rev. Lett.; (United States) 1987-07, Vol.59 (2), p.221-224
Hauptverfasser: SOCOLAR, J. E. S, WRIGHT, D. C
Format: Artikel
Sprache:eng
Schlagworte:
ALLOYS
ALUMINIUM ALLOYS
COHERENT SCATTERING
Condensed matter: structure, mechanical and thermal properties
COPPER ALLOYS
Cross-disciplinary physics: materials science
rheology
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
ELECTRON DIFFRACTION
Exact sciences and technology
GRAIN BOUNDARIES
LITHIUM ALLOYS
MANGANESE ALLOYS
MATERIALS SCIENCE
Metals, semimetals and alloys
MICROSTRUCTURE
Physics
SCATTERING 360102 > Metals & Alloys-- Structure & Phase Studies
Specific materials
STRAINS
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
SYMMETRY
SYMMETRY BREAKING
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Zusammenfassung:The distinctive peak shapes observed in diffraction studies of the icosahedral phases of Al--Mn, Al--Li--Cu, and related alloys are shown to arise from a specific configuration of quenched phason strains in a grain. This configuration is determined by considerations of symmetry and continuity of the phason field. Al--Mn and Al--Li--Cu peak shapes are explained by minor variations of a single mechanism. 17 ref.--AA(US).
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.59.221