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Atomic correlations in AlCo decagonal approximant phases

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  • Widom, Mike
  • Cockayne, Eric

Abstract

Many distinct phases of aluminum cobalt alloys occur in a narrow composition range near Al3Co. We compare the distribution functions of these structures with pair potentials calculated for this binary alloy. Both the Al Co and the Co Co distributions display strong modulations out to distances of beyond 10 Å, while the Al Al distributions approach a constant beyond a few Angstroms. Radial distribution functions peaks generally fall in the vicinity of pair potential minima. We show how energetically favorable interatomic spacings relate to local atomic arrangements in a cluster known as a pentagonal bipyramid. Filling space with this cluster suggests a possible tiling model for the decagonal phase.

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  • Widom, Mike & Cockayne, Eric, 1996. "Atomic correlations in AlCo decagonal approximant phases," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 232(3), pages 713-722.
    • Handle: RePEc:eee:phsmap:v:232:y:1996:i:3:p:713-722
    DOI: 10.1016/0378-4371(96)00179-3
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    Cited by:

    1. Miȩkisz, J., 1996. "Low-temperature stability of quasicrystals," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 232(3), pages 657-661.

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