Chromium agglomeration induced by Fe+ ion irradiation of Fe-10at%Cr

S. Pantousa; A.J. London; K. Mergia; A. Ionescu; E. Manios; P. Tsavalas; S. Dellis; C. Kinane; S. Langridge; A. Caruana; U. Kentsch; S. Messoloras

Nuclear Materials and Energy (Jun 2024)

Chromium agglomeration induced by Fe+ ion irradiation of Fe-10at%Cr

S. Pantousa,
A.J. London,
K. Mergia,
A. Ionescu,
E. Manios,
P. Tsavalas,
S. Dellis,
C. Kinane,
S. Langridge,
A. Caruana,
U. Kentsch,
S. Messoloras

Affiliations

S. Pantousa: Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, NCSR “Demokritos”, Athens 15341, Greece; Department of Physics, National and Kapodistrian University of Athens, Athens 15784, Greece
A.J. London: UK Atomic Energy Authority, Culham Science Centre, Oxfordshire OX14 3DB, United Kingdom
K. Mergia: Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, NCSR “Demokritos”, Athens 15341, Greece; Corresponding author.
A. Ionescu: Cavendish Laboratory, University of Cambridge, J J Thomson Avenue 19, Cambridge CB3 0HE, United Kingdom
E. Manios: Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, NCSR “Demokritos”, Athens 15341, Greece
P. Tsavalas: Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, NCSR “Demokritos”, Athens 15341, Greece
S. Dellis: Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, NCSR “Demokritos”, Athens 15341, Greece
C. Kinane: ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Chilton OX11 0QX, United Kingdom
S. Langridge: ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Chilton OX11 0QX, United Kingdom
A. Caruana: ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Chilton OX11 0QX, United Kingdom
U. Kentsch: Ion Beam Center, Helmholtz-Zentrum Dresden-Rossendorf, Germany
S. Messoloras: Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, NCSR “Demokritos”, Athens 15341, Greece

Journal volume & issue: Vol. 39
p. 101680

Abstract

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Fe-Cr alloys serve as model alloys for the investigation of radiation induced effects in ferritic-martensitic steels which are candidate structural materials for future fusion reactors. In this work the effect of Cr segregation and/or agglomeration in 490 keV Fe+ ion irradiated Fe-10at%Cr alloys in the form of thin films is investigated. The irradiations took place at 300 °C at doses ranging from 0.5 to 20 displacements per atom (dpa). Polarized Neutron Reflectivity (PNR) measurements were used for the determination of the solute Cr concentration in the Fe-Cr matrix. Cr depletion from the Fe-Cr matrix up to 2.4 at% was found. This is related to solute Cr decrement as the accumulated dose increases. After the damage of 4 dpa, solute Cr reaches the asymptotic value of 8.4 at%, close to that of the thermodynamic equilibrium in Fe-Cr. Atom Probe Tomography (APT) measurements showed that after irradiation Cr accumulates into clusters the majority of which is co-located with oxygen.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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