کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1469770 | 990309 | 2011 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Focussed ion beam sectioning for the 3D characterisation of cracking in oxide scales formed on commercial ZIRLO™ alloys during corrosion in high temperature pressurised water Focussed ion beam sectioning for the 3D characterisation of cracking in oxide scales formed on commercial ZIRLO™ alloys during corrosion in high temperature pressurised water](/preview/png/1469770.png)
Using FIB sectioning and reconstruction techniques we have performed a quantitative analysis on the microstructure of cracks and the topography of the metal–oxide interface in oxides formed on ZIRLO™ alloys in high-temperature water. The most significant observation is the continuous production of cracks both before and after the transition in kinetics, not a sudden burst of crack nucleation at transition as assumed in the literature. By concluding that cracks are not generated as a result of the transition and are not the primary cause, we suggest that a process by which cracks within the scale become connected to the oxidising environment through interconnected nanoporosity may be critical in controlling the overall rate of oxidation.
► FIB 3D sectioning has been used for the analysis of cracking in zirconium oxides.
► We observe a gradual production of cracks, not a sudden burst of crack nucleation at transition.
► The location of cracks near the metal/oxide interface is closely linked to the interface geometry.
► Cracks are not generated as a result of the kinetic transition, but may instead play a role in encouraging the transition.
► The process by which cracks become connected to the oxidising environment may be critical controlling the corrosion rate.
Journal: Corrosion Science - Volume 53, Issue 12, December 2011, Pages 4073–4083