Re. Stoller, POINT-DEFECT SURVIVAL AND CLUSTERING FRACTIONS OBTAINED FROM MOLECULAR-DYNAMICS SIMULATIONS OF HIGH-ENERGY CASCADES, Journal of nuclear materials, 237, 1996, pp. 999-1003
Citations number
10
Categorie Soggetti
Nuclear Sciences & Tecnology","Mining & Mineral Processing","Material Science
The evolution of high-energy displacement cascades in iron has been in
vestigated for times up to 200 ps using the method of molecular dynami
cs simulation. The simulations were carried out using the MOLDY code a
nd a modified version of the many-body interatomic potential developed
by Finnis and Sinclair. Previously reported results have been supplem
ented by a series of 10 keV simulations at 900 K and 20 keV simulation
s at 100 K. The results indicate that the fraction of the Frenkel pair
s escaping in-cascade recombination is somewhat higher and the fractio
n of the surviving point defects that cluster is lower in iron than in
materials such as copper. In particular, vacancy clustering appears t
o be inhibited in iron. Many of the larger interstitial clusters were
observed to exhibit a complex, three-dimensional morphology. The appar
ent mobility of the [111] crowdion and clusters of [111] crowdions was
very high.