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Title: Small-scale characterisation of irradiated nuclear materials: Part I – Microstructure

The behaviour of nanometre-scale precipitates in oxide dispersion strengthened (ODS) ferritic alloys and tungsten-rhenium alloys for nuclear applications has been examined by atom probe tomography (APT). Low Re content tungsten alloys showed no evidence of Re clustering following self-ion irradiation whereas the 25 at.% Re resulted in cluster formation. The size and composition of clusters varied depending on the material form during irradiation (pre-sharpened needle or bulk). Lastly, these results highlight the care that must be taken in interpreting data from ion irradiated pre-sharpened needles due to the presence of free surfaces. Self-ion irradiation of the ODS ferritic alloy resulted in a change in the composition of the clusters, indicating a transition from a near-stoichiometric Y 2Ti 2O 7 composition towards a Ti 2YO 5.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Univ. of Oxford (United Kingdom)
Publication Date:
Grant/Contract Number:
AC05-00OR22725; EP/H018921/1
Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 462; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE; Engineering and Physical Sciences Research Council (EPSRC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1261445

Edmondson, P. D., London, A., Xu, A., Armstrong, D. E. J., and Roberts, S. G.. Small-scale characterisation of irradiated nuclear materials: Part I – Microstructure. United States: N. p., Web. doi:10.1016/j.jnucmat.2014.11.067.
Edmondson, P. D., London, A., Xu, A., Armstrong, D. E. J., & Roberts, S. G.. Small-scale characterisation of irradiated nuclear materials: Part I – Microstructure. United States. doi:10.1016/j.jnucmat.2014.11.067.
Edmondson, P. D., London, A., Xu, A., Armstrong, D. E. J., and Roberts, S. G.. 2014. "Small-scale characterisation of irradiated nuclear materials: Part I – Microstructure". United States. doi:10.1016/j.jnucmat.2014.11.067. https://www.osti.gov/servlets/purl/1261445.
@article{osti_1261445,
title = {Small-scale characterisation of irradiated nuclear materials: Part I – Microstructure},
author = {Edmondson, P. D. and London, A. and Xu, A. and Armstrong, D. E. J. and Roberts, S. G.},
abstractNote = {The behaviour of nanometre-scale precipitates in oxide dispersion strengthened (ODS) ferritic alloys and tungsten-rhenium alloys for nuclear applications has been examined by atom probe tomography (APT). Low Re content tungsten alloys showed no evidence of Re clustering following self-ion irradiation whereas the 25 at.% Re resulted in cluster formation. The size and composition of clusters varied depending on the material form during irradiation (pre-sharpened needle or bulk). Lastly, these results highlight the care that must be taken in interpreting data from ion irradiated pre-sharpened needles due to the presence of free surfaces. Self-ion irradiation of the ODS ferritic alloy resulted in a change in the composition of the clusters, indicating a transition from a near-stoichiometric Y2Ti2O7 composition towards a Ti2YO5.},
doi = {10.1016/j.jnucmat.2014.11.067},
journal = {Journal of Nuclear Materials},
number = C,
volume = 462,
place = {United States},
year = {2014},
month = {11}
}