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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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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.
ZIRLO;oxide;pre-transition;primary water;in-situ transmissionelectron microscopy;
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