Raman spectra and nano-indentation of Ar-irradiated borosilicate glass

Zhang, G.F.; Wang, T.S.; Yang, Kunjie; Chen, L.; Zhang, L.M.; Peng, Haibo; Wang, Yuan; Tian, Feng

doi:10.1016/j.nimb.2013.09.020

Cited by 40 publications

(46 citation statements)

References 22 publications

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“…The migration of Na also indicated that the extra positive charge have no obvious effects on our results. Alkali phase separation have been reported in experiments by electrons and heavy ions irradiation …”

Section: Resultssupporting

confidence: 90%

“…The average Si‐O‐Si angle of pristine glass was around 144° as shown in Figure B, which was consistent with experimental values 144°‐147° . The results of decreased Si‐O‐Si average angles were agreed with results in which the glasses were irradiated by heavy ions and electron . The peaks located around 90° appeared in glasses of S3, S4, and S5, which indicated that small size rings (especially rings with 4 atoms such as two silicon and two oxygen atoms) were formed and increased with decrease in oxygen atoms.…”

Section: Resultssupporting

confidence: 87%

“…Decrease in average of Si‐O‐Si were often confirmed by the Raman spectrum . In this work, the angular distribution of Si‐O‐Si is shown in Figure .…”

Section: Resultssupporting

confidence: 68%

“…However, Jiang et al suggested that the conversion of [BO 4 ] into [BO 3 ] units when electrons bombarded the sodium borosilicate glasses would lead to the formation of O 2 molecules or clusters. While in our previous work, the O 2 peak was identified by Raman spectrum as well as the depth profile while Electron Paramagnetic Resonance (EPR) suggested presence of ≡Si‐O‐O − , which was attributed to glass network [SiO 4 ] units (break of ≡Si‐O‐Na or ≡Si‐O‐O − respectively).…”

Section: Introductionmentioning

confidence: 80%

“…As a kind of candidate of High Level nuclear Waste forms (HLW), the glass suffers irradiations of alpha, beta, and gamma rays during the geological disposal . In order to understand the mechanism of those irradiation effects, the borosilicate glass was extensively irradiated by heavy ions, electrons, and gamma rays . Variations of properties such as volume, hardness, microstructure, induced defects, and the formation of bubbles were characterized by nanoindentation, Raman spectroscopy, infrared spectroscopy (IR), Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM) and so on.…”

Section: Introductionmentioning

confidence: 99%

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Origin of molecular oxygen formation in irradiated borosilicate glasses studied by molecular dynamics simulation

Wang

Peng

et al. 2018

Int J of Appl Glass Sci

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Formation of molecular oxygen was observed in borosilicate glasses irradiated with energetic ions and electrons, which has significant effects on mechanical properties of glasses and evaluation of High Level nuclear Waste (HLW) immobilization. Though O2 was considered from the broken of X‐O‐Na (X is Si or B) in borosilicate glass, what was X species remained unclear. To find out the original source of molecular oxygen O2 in irradiated borosilicate glasses, several oxygen atoms were artificial randomly removed from the pristine glasses by molecular dynamics simulation (MD). The simulation results suggested that the formation of O2 firstly came from [BO4] units by the conversion of [BO4] to [BO3] units. When the conversion reached saturation, the [SiO4] units acted as the secondary source. Sodium phase separation was also derived after oxygen atoms reduced, which was well‐agreed with electron irradiated glasses. After the oxygen was removed, average Si‐O‐Si angle decreased and the small size rings increased. These simulation results were in good agreement with experiments.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 87%

“…Decrease in average of Si‐O‐Si were often confirmed by the Raman spectrum . In this work, the angular distribution of Si‐O‐Si is shown in Figure .…”

Section: Resultssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 80%