In this study the oxidation state of niobium, within the oxide layer of a low-tin ZIRLO1 irradiated in a nuclear reactor, is examined using synchrotron. The unique set up allows simultaneous acquisition of X-ray florescence (XRF) and X-ray diffraction (XRD) maps. A gradual oxidation and evolution of niobium is observed and quantified which is then compared with the information on the distribution of oxide phases revealed by XRD. The results are discussed with the aim to better understand the hydrogen uptake mechanism for this material, particularly the cause of the increased resistance to hydrogen uptake seen in niobium containing alloys.
|Number of pages||12|
|Early online date||16 Jun 2021|
|Publication status||Published - Sept 2021|
Bibliographical noteFunding Information:
The authors wish to acknowledge swissnuclear for the support of the HyUp research project, from financial and technical point of view. The sample has been provided by Westinghouse and within the frame of the MUZIC-3 working group activities. The authors acknowledge the sample preparation by Dr. Pia Tijeland and her team. Prof. Adrien Couet is acknowledged for the supply of NbO (2+) spectra. Mr Go Sajiki and Prof. Kiyotaka Asakura are thanked for the supply of Nb2O3 (3+) spectra. Sensitivity analysis of the quality of fit of the XANES results was performed with the assistance of resources and services from the Australian National Computational Infrastructure, MASSIVE, the Pawsey Supercomputing Centre and by Intersect Australia Ltd.
© 2021 Elsevier Ltd
- Hydrogen uptake
- Zirconium based fuel cladding
ASJC Scopus subject areas
- Chemical Engineering(all)
- Materials Science(all)