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Title: Structural model for the Al{sub 72}Ni{sub 20}Co{sub 8} decagonal quasicrystals

Abstract

We propose a structure model for the Al{sub 72}Ni{sub 20}Co{sub 8} decagonal quasicrystals based on its {tau}{sup 2}-inflated Al{sub 13}Co{sub 4} approximant phase: Applying a 10{sub 5} screw operation on a monolayer obtained from the approximant reproduces almost all features of 2-nm clusters seen in atomic-resolution Z-contrast images of Al{sub 72}Ni{sub 20}Co{sub 8} decagonal quasicrystals. The exception is the central ring, where the symmetry is broken due to chemical ordering of Al and transition metals. By restricting possible overlaps, this enforces the perfect quasiperiodic tiling. (c) 2000 The American Physical Society.

Authors:
 [1];  [2]
  1. National Renewable Energy Laboratory, Golden, Colorado 80401 (United States)
  2. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
Publication Date:
OSTI Identifier:
20216571
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 61; Journal Issue: 21; Other Information: PBD: 1 Jun 2000; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTAL STRUCTURE; ALUMINIUM BASE ALLOYS; COBALT ALLOYS; NICKEL ALLOYS; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Yan, Yanfa, and Pennycook, Stephen J. Structural model for the Al{sub 72}Ni{sub 20}Co{sub 8} decagonal quasicrystals. United States: N. p., 2000. Web. doi:10.1103/PhysRevB.61.14291.
Yan, Yanfa, & Pennycook, Stephen J. Structural model for the Al{sub 72}Ni{sub 20}Co{sub 8} decagonal quasicrystals. United States. doi:10.1103/PhysRevB.61.14291.
Yan, Yanfa, and Pennycook, Stephen J. Thu . "Structural model for the Al{sub 72}Ni{sub 20}Co{sub 8} decagonal quasicrystals". United States. doi:10.1103/PhysRevB.61.14291.
@article{osti_20216571,
title = {Structural model for the Al{sub 72}Ni{sub 20}Co{sub 8} decagonal quasicrystals},
author = {Yan, Yanfa and Pennycook, Stephen J.},
abstractNote = {We propose a structure model for the Al{sub 72}Ni{sub 20}Co{sub 8} decagonal quasicrystals based on its {tau}{sup 2}-inflated Al{sub 13}Co{sub 4} approximant phase: Applying a 10{sub 5} screw operation on a monolayer obtained from the approximant reproduces almost all features of 2-nm clusters seen in atomic-resolution Z-contrast images of Al{sub 72}Ni{sub 20}Co{sub 8} decagonal quasicrystals. The exception is the central ring, where the symmetry is broken due to chemical ordering of Al and transition metals. By restricting possible overlaps, this enforces the perfect quasiperiodic tiling. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevB.61.14291},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 21,
volume = 61,
place = {United States},
year = {2000},
month = {6}
}