@inproceedings{53ee9b3d5e85429ab6ca6df70aa70f7e,
title = "Anisotropy of the vacancy migration in Ti, Zr and Hf hexagonal close-packed metals from first principles",
abstract = "The vacancy properties in group-IV hexagonal close-packed metals (Ti, Zr and Hf) have been investigated by Density Functional Theory (DFT) calculations performed with the SIESTA code. The migration energies are found to be systematically lower by ∼0.15eV within the basal plane than out of the basal plane. The electronic origin of this significant contribution to diffusion anisotropy is evidenced by the analysis of the local electronic densities of states and by a comparison with and empirical potential. The average value of the migration energy is in very good agreement with available experimental data in Zr. The activation energies for self-diffusion obtained assuming a vacancy mechanism are in good agreement with experiments in Zr and Hf, although slightly too small, but a significant discrepancy is observed in Ti.",
keywords = "Hafnium, Hexagonal close-packed metals, Titanium, Vacancy, Zirconium, ab initio",
author = "Guillaume V{\'e}rit{\'e} and F. Willaime and Chu, \{Chun Fu\}",
year = "2007",
month = jan,
day = "1",
doi = "10.4028/3-908451-39-6.75",
language = "English",
isbn = "9783908451396",
series = "Solid State Phenomena",
publisher = "Trans Tech Publications Ltd",
pages = "75--81",
booktitle = "Multiscale Kinetic Modelling of Materials - Proceedings of the Symposium {"}Multiscale Kinetic Modelling of Materials{"} organised within the EMRS Fall Meeting 2006",
note = "Symposium {"}Multiscale Kinetic Modelling of Materials{"}, EMRS Fall Meeting 2006 ; Conference date: 04-09-2006 Through 08-09-2006",
}