TY - JOUR
T1 - EELS and atom probe tomography study of the evolution of the metal/oxide interface during zirconium alloy oxidation
AU - De Gabory, Benoit
AU - Dong, Yan
AU - Motta, Arthur T.
AU - Marquis, Emmanuelle A.
N1 - Funding Information:
The authors would like to thank Trevor Clark, Ke Wang and Josh Maier for their invaluable help and advice regarding the operation of the TEM and the FIB. This work has been made possible thanks to the variety of samples oxidized by Robert Comstock at Westinghouse, as part of the MUZIC2 program. This research was performed using funding received from the DOE Office of Nuclear Energy’s Nuclear Energy University Programs under contracts # NE0000315 and # 00121106 , and was partly supported by the University of Michigan College of Engineering .
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/6/14
Y1 - 2015/6/14
N2 - In an effort to understand the mechanisms resulting in the variations of corrosion rate observed throughout corrosion including at the first kinetic transition when the oxide temporarily loses its protective character, the oxide/metal interfaces of autoclave corroded Zircaloy-4 and ZIRLO™ before and after the transition are characterized using electron energy loss spectroscopy and atom probe tomography. The results reveal a complex structure of different phases at different stages of corrosion. The oxide/metal interface exhibits an intermediate layer, with an oxygen content between 45 and 55 O at.% and a suboxide layer corresponding to an oxygen-saturated solid solution in the metal matrix side (∼30 O at.%). Local variations are observed in the width of these characteristic structural features, especially near the transition. Good agreement on the layers present as well as their order, composition, and width was seen with the two techniques.
AB - In an effort to understand the mechanisms resulting in the variations of corrosion rate observed throughout corrosion including at the first kinetic transition when the oxide temporarily loses its protective character, the oxide/metal interfaces of autoclave corroded Zircaloy-4 and ZIRLO™ before and after the transition are characterized using electron energy loss spectroscopy and atom probe tomography. The results reveal a complex structure of different phases at different stages of corrosion. The oxide/metal interface exhibits an intermediate layer, with an oxygen content between 45 and 55 O at.% and a suboxide layer corresponding to an oxygen-saturated solid solution in the metal matrix side (∼30 O at.%). Local variations are observed in the width of these characteristic structural features, especially near the transition. Good agreement on the layers present as well as their order, composition, and width was seen with the two techniques.
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U2 - 10.1016/j.jnucmat.2015.03.043
DO - 10.1016/j.jnucmat.2015.03.043
M3 - Article
AN - SCOPUS:84931287720
VL - 462
SP - 304
EP - 309
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
ER -