Dislocation motion in quasicrystals and implications for macroscopic properties
- 1 June 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 33 (11) , 7715-7719
- https://doi.org/10.1103/physrevb.33.7715
Abstract
Dislocation mobilities in quasicrystals are calculated from recently developed hydrodynamic equations. The mobilities are expressed in terms of vacancy diffusion constants for the quasicrystal. Estimates of these diffusion constants based on their values in conventional crystals lead to far smaller dislocation mobilities than in conventional crystals. Plastic flow should therefore be effectively prohibited; one dramatic consequence is that quasicrystals should be extremely brittle. A detailed microscopic calculation of vacancy diffusion constants is urged. Implications for icosahedral-order theories of glasses are discussed.Keywords
This publication has 23 references indexed in Scilit:
- Hydrodynamics of icosahedral quasicrystalsPhysical Review B, 1985
- Symmetry, stability, and elastic properties of icosahedral incommensurate crystalsPhysical Review B, 1985
- Elasticity and Dislocations in Pentagonal and Icosahedral QuasicrystalsPhysical Review Letters, 1985
- Phenomenological Theory of Icosahedral Incommensurate ("Quasiperiodic") Order in Mn-Al AlloysPhysical Review Letters, 1985
- 6-dimensional properties of Al0.86Mn0.14 alloyJournal de Physique Lettres, 1985
- Quasicrystals: A New Class of Ordered StructuresPhysical Review Letters, 1984
- Metallic Phase with Long-Range Orientational Order and No Translational SymmetryPhysical Review Letters, 1984
- On periodic and non-periodic space fillings ofEmobtained by projectionActa Crystallographica Section A Foundations of Crystallography, 1984
- Non-periodic central space filling with icosahedral symmetry using copies of seven elementary cellsActa Crystallographica Section A, 1982
- AMORPHOUS STRUCTURAL MODELS USING REGULAR TESSELLATION OF CURVED SPACESLe Journal de Physique Colloques, 1980