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Local Order in Single Grain Cd-Yb Icosahedral Phase

Published online by Cambridge University Press:  01 February 2011

Y. Q. Wu ,
M. J. Kramer  and
T. A. Lograsso
Y. Q. Wu
Affiliation:
Metals and Ceramics Sciences, Ames Laboratory, Ames, Iowa 50011
M. J. Kramer
Affiliation:
Metals and Ceramics Sciences, Ames Laboratory, Ames, Iowa 50011
T. A. Lograsso
Affiliation:
Metals and Ceramics Sciences, Ames Laboratory, Ames, Iowa 50011
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Abstract

Single grains of icosahedral Cd84Yb16 quasicrystalline phase were characterized using high resolution transmission electron microcopy (HRTEM) technique. Image reconstruction of the obtained multiple through-focal series for both the two and five-fold axes are consistent with the local cluster structure of concentric polyhedra consisting of Cd tetrahedron (1/3 occupied icosahedron), Cd dodecahedron, Yb icosahedron and a Cd icosidodecahedron. Edge-sharing of the clusters can result in complete tiling of the 2-D projections. Simple matching rules are being investigated to construct a 3-D model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 805: Symposium LL – Quasicrystals , 2003 , LL7.4
Copyright
Copyright © Materials Research Society 2004

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References

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