Fe+ ion irradiation effects in Fe-10at%Cr films irradiated at 300 °C. (March 2022)

• Record Type: Journal Article
• Authors: Pantousa, S.; Mergia, K.; Ionescu, A.; Manios, E.; Dellis, S.; Kinane, C.; Langridge, S.; Caruana, A.; Kentsch, U.; Messoloras, S.
• Is Part Of: Nuclear materials and energy. Volume 30(2022)
• Publication Date: 2022-03
• Subjects: Fe-Cr alloys -- Ion irradiation -- Lattice damage -- Cr depletion -- Polarized neutron reflectivity -- Magnetization; Nuclear energy -- Periodicals; Nuclear fuels -- Periodicals; Nuclear reactors -- Materials -- Periodicals; Radioactive substances -- Periodicals; 621.4833
• DOI: 10.1016/j.nme.2022.101147
• Languages: English
• ISSNs: 2352-1791

Abstract

Highlights: Fe + ion irradiation of Fe-10at%Cr films at 300 °C. The irradiation produced dose dependent: - lattice constant increase, - grain growth, - Cr depletion in the matrix. These changes occur largely up to 4 displacements per atom (dpa) and afterwards the system attains a dynamic equilibrium. Abstract: Fe-Cr alloys constitute the model systems for the investigation of radiation damage effects in ferritic-martensitic steels which are candidate structural materials for fusion reactors. In the current study Fe-10at%Cr alloy films of 70 nm thickness were irradiated by 490 keV Fe + ions at 300 °C at doses ranging from 0.5 up to 20 displacements per atom (dpa). The Fe + ion energy chosen corresponds to the energy of primary Fe(Cr) knock-on atoms from 14 MeV neutrons. The irradiation effects were investigated employing X-ray diffraction and X-ray and polarized neutron reflectivity. The irradiation produced dose dependent: a) lattice constant increase, b) grain size growth and c) Cr depletion in the matrix. These changes occur largely up to 4 dpa and afterwards the system attains a dynamic equilibrium.