کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5454367 | 1514164 | 2016 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Oxide evolution on Alloy X-750 in simulated BWR environment Oxide evolution on Alloy X-750 in simulated BWR environment](/preview/png/5454367.png)
In order to simulate the environment experienced by spacer grids in a boiling water reactor (BWR), specimens of the Ni-based Alloy X-750 were exposed to a water jet in an autoclave at a temperature of 286 °C and a pressure of 80 bar. The oxide microstructure of specimens exposed for 2 h, 24 h, 168 h and 840 h has been investigated mainly using electron microscopy. The specimens suffer mass loss due to dissolution during exposure. At the same time a complex layered oxide develops. After the longest exposure the oxide consists of two outer spinel layers consisting of blocky crystals, one intermediate layer of nickel oxide interspersed with Ti-rich oxide needles, and an inner layer of oxidized base metal. The evolution of the oxide leading up to this structure is discussed and a model is presented.
Journal: Journal of Nuclear Materials - Volume 482, 15 December 2016, Pages 19-27