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Transmission Electron Microscopy Characterization of Early Pre-Transition Oxides Formed on ZIRLOTM
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  • Journal title : Corrosion Science and Technology
  • Volume 14, Issue 6,  2015, pp.301-312
  • Publisher : The Corrosion Science Society of Korea
  • DOI : 10.14773/cst.2015.14.6.301
 Title & Authors
Transmission Electron Microscopy Characterization of Early Pre-Transition Oxides Formed on ZIRLOTM
Bae, Hoyeon; Kim, Taeho; Kim, Ji Hyun; Bahn, Chi Bum;
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 Abstract
Corrosion of zirconium fuel cladding is known to limit the lifetime and reloading cycles of fuel in nuclear reactors. Oxide layers formed on ZIRLO cladding samples, after immersion for 300-hour and 50-day in a simulated primary water chemistry condition ( and 20 MPa), were analyzed by using the scanning transmission electron microscopy (STEM), in-situ transmission electron microscopy (in-situ TEM) with the focused ion beam (FIB) technique, and X-ray diffraction (XRD). Both samples (immersion for 300 hours and 50 days) revealed the presence of the ZrO sub-oxide phase at the metal/oxide interface and columnar grains developed perpendicularly to the metal/oxide interface. Voids and micro-cracks were also detected near the water/oxide interface, while relatively large lateral cracks were found just above the less advanced metal/oxide interface. Equiaxed grains were mainly observed near the water/oxide interface.
 Keywords
ZIRLO;oxide;pre-transition;primary water;in-situ transmissionelectron microscopy;
 Language
English
 Cited by
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