TEM characterisation of heavy-ion irradiation damage in FeCr alloys

Heavy-ion damage in a series of FeCr binary alloys and pure Fe has been investigated by TEM. Specimens were irradiated in bulk with 1.5 MeV Fe + ions at an irradiation temperature of 300 °C. A TEM specimen preparation technique has been developed to access the peak of the buried damage region. The d...

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Bibliographic Details
Published in:Journal of nuclear materials 2009-04, Vol.386, p.161-164
Main Authors: Xu, S., Yao, Z., Jenkins, M.L.
Format: Article
Language:English
Subjects:
Applied sciences
Burgers vector
Controled nuclear fusion plants
Damage
Density
Dislocation loops
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Ferrous alloys
Fission nuclear power plants
Fuels
Installations for energy generation and conversion: thermal and electrical energy
Intermetallic compounds
Iron
Irradiation
Nuclear fuels
Transmission electron microscopy
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Summary:Heavy-ion damage in a series of FeCr binary alloys and pure Fe has been investigated by TEM. Specimens were irradiated in bulk with 1.5 MeV Fe + ions at an irradiation temperature of 300 °C. A TEM specimen preparation technique has been developed to access the peak of the buried damage region. The damage took the form of dislocation loops with sizes ranging up to a few tens of nanometres. Loops with Burgers vectors of type b = and b = ½ were both present in all the specimens, but the proportion of loops was higher in FeCr alloys than in pure Fe. In Fe–8%Cr the loop number density was determined to be (1.6 ± 0.2) × 1021 m-2. Nature determinations showed that loops in Fe–11Cr and ½ loops in Fe–8Cr were of interstitial type.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2008.12.078