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A TEM Study of Bubbles Growth with Temperature in Xenon and Krypton Implanted Uranium Dioxide

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Abstract:

Transmission electron microscopy (TEM) characterizations were carried out on a set of UO2 thin foils previously implanted at room temperature with 400 keV Xe2+ and 250 keV Kr2+ ions at the fluence 7.1015 at.cm-2 (equivalent to 1 at.%/at. UO2). The experiment was devoted to the study of the evolution of the fission gases bubbles populations with increasing temperature. Annealings were performed in the laboratory furnace at 600°C, 800°C, 1000°C for 12h, 1400°C for 4h and 1500°C for 2h under Ar-5%H2 atmosphere. For each annealing condition and for as-implanted specimens the bubble population has been characterized in size and number density. A comparison between Xe and Kr has been done that showed a similar behaviour. Globally, from the as-implanted sample to the 1500°C annealed, the bubbles growth phenomenon and the microstructure evolution with temperature was put in relieve.

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Periodical:

Defect and Diffusion Forum (Volumes 323-325)

Pages:

191-196

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.323-325.191

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Online since:

April 2012

Authors:

Amélie Michel, C. Sabathier, G. Carlot, M. Cabié, S. Bouffard, Philippe Garcia

Keywords:

Bubble, Growth, Krypton, TEM, Uranium Dioxide, Xenon

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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