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Dislocation Glide Resistance in a Model Quasicrystalline Lattice

Published online by Cambridge University Press:  17 March 2011

R. Tamura ,
S. Takeuchi  and
K. Edagawa
R. Tamura
Affiliation:
Department of Materials Science and Technology, Science University of Tokyo, Noda, Chiba 278-8510, Japan
S. Takeuchi
Affiliation:
Department of Materials Science and Technology, Science University of Tokyo, Noda, Chiba 278-8510, Japan
K. Edagawa
Affiliation:
Institute of Industrial Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8904, Japan
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Abstract

The glide resistance of edge dislocations gliding along a two-dimensional quasiperiodic lattice (Burkov II model of the decagonal quasicrystal) has been calculated. The glide resistance consists of τphason and τPeierls components and the τPeierls component depends strongly on the orientation of the dislocation. For the orientation of large τPeierls component, the τphason component is about half of the τPeierls component for individual dislocation glide but becomes negligibly small for glide of a pair of dislocations. The largest τPeierls component is about 0.1G (G: the shear modulus).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 643: Symposium K – Quasicrystals-Preparation, Properties, and Applications , 2000 , K6.4
Copyright
Copyright © Materials Research Society 2002

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