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
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DOI：
10.1016/j.corsci.2011.08.013
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发表时间：
2011-12-01
影响因子：
8.3
通讯作者：
Grovenor, C. R. M.
中科院分区：
文献类型：
--
作者：
Ni, N.;Lozano-Perez, S.;Grovenor, C. R. M.
利用FIB切片和重建技术，我们对ZIRLO（TM）合金在高温水中形成的氧化物中裂纹的微观结构和金属-氧化物界面的形貌进行了定量分析。最重要的观察结果是在动力学转变前后连续产生裂纹，而不是文献中假设的在转变时裂纹成核的突然爆发。通过得出结论，裂纹不会产生的过渡的结果，并不是主要原因，我们建议的过程中，裂纹内的规模成为连接到氧化环境，通过互连的纳米孔隙率可能是至关重要的，在控制整体氧化速率。(C)2011爱思唯尔有限公司保留所有权利。
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 (TM) 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. (C) 2011 Elsevier Ltd. All rights reserved.