Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7893016 | Corrosion Science | 2018 | 4 Pages |
Abstract
Density functional theory simulations were used to study Sn defect clusters in the oxide layer of Zr-alloys. Clustering was shown to play a key role in the accommodation of Sn in ZrO2, with the {SnZr:VO}à bound defect cluster dominant at all oxygen partial pressures below 10â20â¯atm, above which SnZrà is preferred. {SnZr:VO}à is predicted to increase the tetragonal phase fraction in the oxide layer, due to the elevated oxygen vacancy concentration. As corrosion progresses, the transition to SnZrÃ, and resultant destabilisation of the tetragonal phase, is proposed as a possible explanation for the early first transition observed in Sn-containing Zr-Nb alloys.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
B.D.C. Bell, S.T. Murphy, R.W. Grimes, M.R. Wenman,