Paper Title:
Orientation of Interstitials in Clusters in α-Fe: A Comparison between Empirical Potentials
  Abstract

We have addressed two issues concerning the relative stabilities of various orienta- tions of interstitial clusters in iron by making a comprehensive comparison between four recent empirical potentials. First, we have investigated the effect of finite temperature on the com- petition between clusters made of a few dumbbells oriented along h111i or h110i. We show by quasi-harmonic calculations that h111i clusters have much larger vibrational formation en- tropies and that they are therefore stabilized with respect to h110i clusters at high temperature. Second, we have compared the formation energies of loops with several hundred atoms with Burgers vector 1 2 h111i or h100i. The 1 2 h111i loops are found to be always more stable, but the energy differences with h100i loops depend strongly on the potential.

  Info
Periodical
Solid State Phenomena (Volume 129)
Edited by
R. Kozubski, G.E. Murch and P. Zięba
Pages
67-74
DOI
10.4028/www.scientific.net/SSP.129.67
Citation
M. C. Marinica, F. Willaime, "Orientation of Interstitials in Clusters in α-Fe: A Comparison between Empirical Potentials ", Solid State Phenomena, Vol. 129, pp. 67-74, 2007
Online since
November 2007
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$32.00
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