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Mechanisms of radiation-induced viscous flow: Role of point defects

Mayr, S. G. and Ashkenazy, Y. and Albe, K. and Averback, R. S. (2003):
Mechanisms of radiation-induced viscous flow: Role of point defects.
In: Phys. Rev. Lett., American Physical Society, pp. 055505-1, 90, (5), [Online-Edition: http://prl.aps.org/abstract/PRL/v90/i5/e055505],
[Article]

Abstract

Mechanisms of radiation-induced flow in amorphous solids have been investigated using molecular dynamics computer simulations. It is shown for a model glass system, CuTi, that the radiation-induced flow is independent of recoil energy between 100 eV and 10 keV when compared on the basis of defect production and that there is a threshold energy for flow of approximate to10 eV. Injection of interstitial- and vacancylike defects induces the same amount of flow as the recoil events, indicating that point-defect-like entities mediate the flow process, even at 10 K. Comparisons of these results with experiments and thermal spike models are made.

Item Type: Article
Erschienen: 2003
Creators: Mayr, S. G. and Ashkenazy, Y. and Albe, K. and Averback, R. S.
Title: Mechanisms of radiation-induced viscous flow: Role of point defects
Language: English
Abstract:

Mechanisms of radiation-induced flow in amorphous solids have been investigated using molecular dynamics computer simulations. It is shown for a model glass system, CuTi, that the radiation-induced flow is independent of recoil energy between 100 eV and 10 keV when compared on the basis of defect production and that there is a threshold energy for flow of approximate to10 eV. Injection of interstitial- and vacancylike defects induces the same amount of flow as the recoil events, indicating that point-defect-like entities mediate the flow process, even at 10 K. Comparisons of these results with experiments and thermal spike models are made.

Journal or Publication Title: Phys. Rev. Lett.
Volume: 90
Number: 5
Publisher: American Physical Society
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
Date Deposited: 28 Feb 2012 14:49
Official URL: http://prl.aps.org/abstract/PRL/v90/i5/e055505
Identification Number: doi:10.1103/PhysRevLett.90.055505
Related URLs:
Funders: The research was supported by the U.S. Department of Energy, Division of Materials Science, under Grant No. DEFG02-91-ER45439, and through the University of California under subcontract B341494.
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