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

Edmondson, P. D.; London, A.; Xu, A.; Armstrong, D. E. J.; Roberts, S. G.

doi:10.1016/j.jnucmat.2014.11.067

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

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Abstract

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.

Authors:

Edmondson, P. D. ^[1]; London, A. ^[1]; Xu, A. ^[1]; Armstrong, D. E. J. ^[1]; Roberts, S. G. ^[1]

Univ. of Oxford (United Kingdom)

Publication Date:: Wed Nov 26 00:00:00 EST 2014

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE; Engineering and Physical Sciences Research Council (EPSRC)

OSTI Identifier:: 1261445

Grant/Contract Number:: AC05-00OR22725; EP/H018921/1

Resource Type:: Journal Article: Accepted Manuscript

Journal Name:: Journal of Nuclear Materials

Additional Journal Information:: Journal Volume: 462; Journal Issue: C; Journal ID: ISSN 0022-3115

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    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., 2014. 
        Web.  doi:10.1016/j.jnucmat.2014.11.067.

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                    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.  https://doi.org/10.1016/j.jnucmat.2014.11.067

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                    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.  https://doi.org/10.1016/j.jnucmat.2014.11.067.  https://www.osti.gov/servlets/purl/1261445.

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@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},

  url          = {https://www.osti.gov/biblio/1261445},
  journal      = {Journal of Nuclear Materials},

  issn         = {0022-3115},

  number       = C,

  volume       = 462,

  place        = {United States},

  year         = {Wed Nov 26 00:00:00 EST 2014},

  month        = {Wed Nov 26 00:00:00 EST 2014}

}

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