Small-angle grain boundaries in quasicrystals

Hatwalne, Yashodhan ; Krishnamurthy, H. R. ; Pandit, Rahul ; Ramaswamy, Sriram (1989) Small-angle grain boundaries in quasicrystals Physical Review Letters, 62 (23). pp. 2699-2702. ISSN 0031-9007

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Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.62.269...

Related URL: http://dx.doi.org/10.1103/PhysRevLett.62.2699

Abstract

The Read-Shockley treatment of small-angle grain boundaries in crystals is generalized to the case of quasicrystals. The dependence of the grain-boundary energy on the angle of mismatch between abutting quasicrystalline grains is calculated. It is found that, even for a symmetric tilt boundary in a quasicrystal, dislocations with at least two types of Burgers vectors are required; these dislocations have to be arranged quasiperiodically along the boundary. The possible clumping of these dislocations to form composites is discussed. Explicit calculations are presented for a pentagonal quasicrystal.

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Source:Copyright of this article belongs to American Physical Society.
ID Code:17604
Deposited On:16 Nov 2010 13:00
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