Surface and bulk electron irradiation effects in simple and complex glasses

Electron and electron-ion sequential irradiation of borosilicate glasses: Impact of the pre-existing defects

“…As discussed in more details in Ref. [12] and briefly in the current article, the surface of the glass irradiated by 2.3 MeV electrons up to 4.5 GGy tends to evolve towards a phase separated glass with a lower mixing of boron and silicon atoms. This can be attributed to the loss of the sodium atoms from the surface (∼660 nm) as observed with the ToF-SIMS.…”

“…However, the structural modifications at the sample surface (<1 μm region) were strikingly different from that in the bulk of the glass (>1 μm region) ( Fig. 5) (see also [12] for more details). The surface Raman spectra showed a large peak at 1552 cm −1 indicating the formation of molecular oxygen (note that a very small peak was observed after Xe ion irradiation).…”

“…A close similarity of the 4 × 10 13 Xe.cm −2 and 0.15 GGy+4 × 10 13 Xe.cm −2 cases shows that the electron pre-irradiation at least up to 0.15 GGy does not have any effect on the structural changes induced by the Xe ions (same was observed at lower Xe fluences. The structural changes due to Xe ion irradiation saturated after irradiation with 8x10 12 Xe.cm −2 ).…”

“…The intensity of the Na ions was normalised by the intensity of silicon ions (more details can be found in Ref. [12].…”

Composition effects on mechanical properties of pristine sodium borosilicate glass

“…And the polymerization for glass system will increase or decrease correspondingly. In some works, a sodium depleted layer around glass surface was observed after irradiation. The deletion of sodium will result in the conversion of [BO 4 ] back to [BO 3 ], then the network will become more depolymerized.…”