@inproceedings{1ba8abf5b61d44d4bae2db0bd042345c,
title = "High resolution mapping of light elements in zirconium oxide with SIMS",
abstract = "The degradation of zirconium (Zr) fuel cladding alloys as a result of oxidation and the effects of hydrogen is a topic of importance to the nuclear industry. This paper presents the results of NanoSIMS studies into the corrosion behavior of Zircaloy-4 and zirconium-niobium (Zr-Nb) alloys through the use of isotopic spiking with 2H and 18O and with samples that are both irradiated and unirradiated. This paper shows that the unique capabilities of the NanoSIMS allow the study of the distribution of hydrogenic species over large areas with submicron resolution, leading to several conclusions. First, 2H and 18O have different distributions within the oxide layer, with oxygen transport being dominated by penetration through cracks, whereas hydrogen transport is largely diffusive in nature. Second, Zircaloy-4 and Nb-containing alloys show different hydrogen distributions within the oxide layer, and the hydrogen distribution in the Nb-containing alloys is strongly affected by exposure to neutron irradiation. Third, the hydrogen diffusion coefficients for Zircaloy-4, Zr-1 wt% Nb, and Zr-2.5 wt% Nb (both in and out of reactor) have been calculated and agree with previous experimental results. Finally, hydrogen in the a-Zr lattice is localized strongly to random, high misorientation grain boundaries.",
keywords = "corrosion, deuterium, hydrogen, irradiation, NanoSIMS, oxygen, zirconium",
author = "Christopher Jones and Kexue Li and Junliang Liu and Thomas Aarholt and Mhairi Gass and Moore, {Katie L.} and Michael Preuss and Grovenor, {Chris R.M.}",
note = "Funding Information: This work is part of a larger project, which is funded in part by the Engineering and Physical Sciences Research Council through the Centre for Doctoral Training in Materials for Demanding Environments, Grant EP/L01680X/1. Funding Information: EPSRC grants (EP/K040375/1 and EP/N010868/1) are acknowledged for funding the South of England Analytical Electron Microscope and the Zeiss Crossbeam FIB/ SEM used in this research. Support for work on active samples was provided by EPSRC Grant EP/M018237/1 and access to the Culham Materials Research Facility. Funding Information: The Manchester NanoSIMS was funded by UK Research Partnership Investment Funding Manchester RPIF Round 2. Some of this work was supported by UK EPSRC Grant EP/M017540/1, and Michael Preuss would also like to acknowledge his EPSRC Leadership Fellowship funding, EP/I005420/1. Funding Information: The authors acknowledge the support of The University of Manchester{\textquoteright}s Dalton Cumbrian Facility, a partner in the National Nuclear User Facility, the EPSRC UK National Ion Beam Centre, and the Henry Royce Institute. The authors recognize Samir de Moraes Shubeita, Paul Wady, and Andrew Smith for their assistance during the H+ irradiation. Publisher Copyright: Copyright {\textcopyright} 2021 by ASTM International.; International Symposium on Zirconium in the Nuclear Industry 2021 ; Conference date: 19-05-2019 Through 23-05-2019",
year = "2021",
month = jul,
day = "28",
doi = "10.1520/STP162220190037",
language = "English",
series = "ASTM Special Technical Publication",
publisher = "ASTM International",
pages = "513--536",
editor = "Motta, {Arthur T.} and Yagnik, {Suresh K.}",
booktitle = "Zirconium in the Nuclear Industry",
url = "https://www.astm.org/products-services/standards-and-publications/symposia-papers/all-symposia-papers.html",
}