Diffusion properties of tungsten from atomistic simulations with ab initiopotentials

The results of atomistic simulations of migration and formation energies of mono- and di-vacancies in bulk tungsten are presented in our paper. The in teratomic potential for tungsten was extracted with the recursive procedure from ah initio calculations of the cohesive energy. A stochastic molecular dynamics using a generalized simulated annealing procedure was employed in the simulations. Calculated values of mono- and di-vacancies energy parame ters are in a good agreement with experimental data and with the results of other calculations. (C) 2001 Elsevier Science B.V. All rights reserved.