Defect cluster formation in vanadium irradiated with heavy ions

摘要: Abstract Irradiation data of vanadium alloys have been accumulated by intensive irradiation experiments in fission reactors. In evaluating performance the fusion environments, we should consider effects high energy cascade damage and transmutation reactions under 14 MeV neutron irradiation. Effects generation rate helium on microstructural evolution mechanical properties studied several techniques including dynamic charging (DHCE) boron doping. However, fundamental understanding defect cluster formation has not yet clarified detail. this study, effect vacancy was investigated as a function transfer cascades using kinds heavy ion irradiations to thin foils specimens. No clusters were observed transmission electron microscope (TEM) 99.8% pure irradiated with 200 400 keV self-ions (V + ) up 1 × 10 16 ion/m 2 at room temperature. Thin foil specimens also Au Xe ions . Energies irradiating 50, 100, 200, 300 keV. ions, about 2–2.5 nm detected TEM. The areal density increased found be dependent thickness region specimens, per deposition energy. These indicate that are produced displacements damage. thicker interstitials can easily annihilate form interstitial clusters. At 20 nm, minimum gold produce estimated 120 This corresponds 4.5 keV/nm/ion.