Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 455, Issue 1-3, Pages 10-15Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2014.02.031
Keywords
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Funding
- CEA [V 3542.001]
- Fonds Europeens de Developpement Regional
- EDF-CNRS joint laboratory EM2VM
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Density Functional Theory calculations and Molecular Dynamics with a recently developed potential for W He were used to evaluate the thermal stability of helium vacancy clusters (nHe.mv) as well as pure interstitial helium clusters in tungsten. The stability of such objects results from a competitive process between thermal emission of vacancies, self interstitial atoms (SlAs) and helium, depending on the helium-to-vacancy ratio in mixed clusters or helium number in pure interstitial helium clusters. We investigated in particular the thermodynamics and kinetics of self trapping and trap mutation, i.e. the emission of one SIA along with the creation of one vacancy from a vacancy helium or pure helium object. (C) 2014 Elsevier B.V. All rights reserved.
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