The Flow of Glasses and Glass–Liquid Transition under Electron Irradiation
Recent discovery and investigation of the flow of glasses under the electron beams of transmission electron microscopes raised the question of eventual occurrence of such type effects in the vitrified highly radioactive nuclear waste (HLW). In connection to this, we analyse here the flow of glasses...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
|
| Series: | International Journal of Molecular Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1422-0067/24/15/12120 |
| _version_ | 1797586674814812160 |
|---|---|
| author | Michael I. Ojovan |
| author_facet | Michael I. Ojovan |
| author_sort | Michael I. Ojovan |
| collection | DOAJ |
| description | Recent discovery and investigation of the flow of glasses under the electron beams of transmission electron microscopes raised the question of eventual occurrence of such type effects in the vitrified highly radioactive nuclear waste (HLW). In connection to this, we analyse here the flow of glasses and glass–liquid transition in conditions of continuous electron irradiation such as under the e-beam of transmission electron microscopes (TEM) utilising the configuron (broken chemical bond) concept and configuron percolation theory (CPT) methods. It is shown that in such conditions, the fluidity of glasses always increases with a substantial decrease in activation energy of flow at low temperatures and that the main parameter that controls this behaviour is the dose rate of absorbed radiation in the glass. It is revealed that at high dose rates, the temperature of glass–liquid transition sharply drops, and the glass is fully fluidised. Numerical estimations show that the dose rates of TEM e-beams where the silicate glasses were fluidised are many orders of magnitude higher compared to the dose rates characteristic for currently vitrified HLW. |
| first_indexed | 2024-03-11T00:26:24Z |
| format | Article |
| id | doaj.art-6598a64a364749bcbc0e0173fa5dad90 |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-11T00:26:24Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-6598a64a364749bcbc0e0173fa5dad902023-11-18T23:00:39ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672023-07-0124151212010.3390/ijms241512120The Flow of Glasses and Glass–Liquid Transition under Electron IrradiationMichael I. Ojovan0Department of Materials, Imperial College London, London SW7 2AZ, UKRecent discovery and investigation of the flow of glasses under the electron beams of transmission electron microscopes raised the question of eventual occurrence of such type effects in the vitrified highly radioactive nuclear waste (HLW). In connection to this, we analyse here the flow of glasses and glass–liquid transition in conditions of continuous electron irradiation such as under the e-beam of transmission electron microscopes (TEM) utilising the configuron (broken chemical bond) concept and configuron percolation theory (CPT) methods. It is shown that in such conditions, the fluidity of glasses always increases with a substantial decrease in activation energy of flow at low temperatures and that the main parameter that controls this behaviour is the dose rate of absorbed radiation in the glass. It is revealed that at high dose rates, the temperature of glass–liquid transition sharply drops, and the glass is fully fluidised. Numerical estimations show that the dose rates of TEM e-beams where the silicate glasses were fluidised are many orders of magnitude higher compared to the dose rates characteristic for currently vitrified HLW.https://www.mdpi.com/1422-0067/24/15/12120glassglass transitionirradiationdose rateconfiguronpercolation |
| spellingShingle | Michael I. Ojovan The Flow of Glasses and Glass–Liquid Transition under Electron Irradiation International Journal of Molecular Sciences glass glass transition irradiation dose rate configuron percolation |
| title | The Flow of Glasses and Glass–Liquid Transition under Electron Irradiation |
| title_full | The Flow of Glasses and Glass–Liquid Transition under Electron Irradiation |
| title_fullStr | The Flow of Glasses and Glass–Liquid Transition under Electron Irradiation |
| title_full_unstemmed | The Flow of Glasses and Glass–Liquid Transition under Electron Irradiation |
| title_short | The Flow of Glasses and Glass–Liquid Transition under Electron Irradiation |
| title_sort | flow of glasses and glass liquid transition under electron irradiation |
| topic | glass glass transition irradiation dose rate configuron percolation |
| url | https://www.mdpi.com/1422-0067/24/15/12120 |
| work_keys_str_mv | AT michaeliojovan theflowofglassesandglassliquidtransitionunderelectronirradiation AT michaeliojovan flowofglassesandglassliquidtransitionunderelectronirradiation |