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Diffuse X-ray scattering measurements of point defects and clusters in iron
- Source :
- Journal of Nuclear Materials. :269-275
- Publication Year :
- 2007
- Publisher :
- Elsevier BV, 2007.
-
Abstract
- The nature of residual damage from atomic displacement cascades in iron has been investigated by diffuse X-ray scattering. A single crystal iron sample was irradiated at ∼60 °C in the High Flux Isotope Reactor at the Oak Ridge National Laboratory to a fluence of 1 × 10 23 n/m 2 ( E > 0.1 MeV), or ∼0.01 dpa. Diffuse X-ray scattering measurements were carried out at the Advanced Photon Source at the Argonne National Laboratory on three specimens: unirradiated, as-irradiated, and irradiated and annealed for one hour at 450 °C (IA). The specimens were cooled to ∼40 K to minimize thermal diffuse scattering. Subsequent measurements of the specimen lattice parameter were completed at ORNL. The diffuse scattering in the as-irradiated specimen was dominated by interstitial defect clusters exhibiting a tetragonal distortion consistent with a 〈1 0 0〉 type defect. Substantial recovery of this defect component was observed following the anneal at 450 °C. A lattice parameter increase was observed following irradiation, which is also consistent with a substantial population of interstitial type defects. A net lattice parameter decrease was observed in the IA specimen, indicating loss of the interstitial defects with a residual population of vacancy-type defects.
- Subjects :
- Nuclear and High Energy Physics
education.field_of_study
Chemistry
Scattering
Population
Advanced Photon Source
Crystallographic defect
Molecular physics
Tetragonal crystal system
Crystallography
Lattice constant
Nuclear Energy and Engineering
Interstitial defect
General Materials Science
education
Single crystal
Subjects
Details
- ISSN :
- 00223115
- Database :
- OpenAIRE
- Journal :
- Journal of Nuclear Materials
- Accession number :
- edsair.doi...........98dd715143a35c7469030bb4f7b5c219