Single crystalline samples of highly ionic Ca2La8(SiO4)6O2 and covalent 6H–SiC have been irradiated with different ions/energies to study the effects of dose, temperature, damage-energy density, and in-cascade ionization rate on the dynamics of irradiation-induced amorphization. Above temperatures of 100–150 K, the dose for complete amorphization, D, increases with temperature in a single stage and exhibits a strong dependence on the ratio of in-cascade recovery to displacement cross sections, sr/sd. A fit of a dynamic model for amorphization to these data indicates that irradiation-induced dynamicrecovery occurs with an activation energy of 0.15 ± 0.02 and 0.12 ± 0.01 eV for Ca2La8(SiO4)6O2 and 6H–SiC, respectively. Analysis of these data reveals that ionization processes are the dominant contributor to in-cascade recovery in Ca2La8(SiO4)6O2; while in 6H–SiC, ionization processes are less dominant.
Revised: October 15, 2012 |
Published: April 5, 2012
Citation
Weber W.J., Y. Zhang, and L.M. Wang. 2012.Review of Dynamic Recovery Effects on Ion Irradiation Damage in Ionic-Covalent Materials.Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms 277. doi:10.1016/j.nimb.2011.12.043